SBC-EC8800 User Manual User Manual
[ SBC-EC8800 ]
Embest Technology Co. Ltd | http://www.embest-tech.com 1 SBC-EC8800 User Manual Copyright Statement:
The Evaluation Board of SBC-EC8800 and related intellectual property owned by Shenzhen Embest Technology Co. Ltd. Shenzhen Embest Technology has the copyright of this document and reserves all rights. Any part of the document should not be modified, distributed or duplicated in any approach and form with the written permission issued by Embest Technology Co., Ltd. Disclaimer:
Shenzhen Embest Technology does not take warranty of any kind, either expressed or implied, as to the program source code, software and documents in the CD/DVD-ROMs provided along with the products, and including, but not limited to, warranties of fitness for a particular purpose; The entire risk as to the quality or performance of the program is with the user of products. Compliance Information:
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help. Embest Technology Co. Ltd | http://www.embest-tech.com 2 SBC-EC8800 User Manual History Rev. Rev1.0 Rev1.1 Note Initial Changed the description of WLAN Author John Xin John Xin Embest Technology Co. Ltd | http://www.embest-tech.com 3 SBC-EC8800 User Manual Catalog History............................................................................................................................................................... 3 Catalog..... ................................................................................................................................................................ 4 Chapter 1 Product Overview .................................................................................................................................... 5 1.1 Brief Introduction .................................................................................................................................... 5 1.1.1 Packing List ................................................................................................................................... 5 1.1.2 Product Features .......................................................................................................................... 5 1.2 1.3 1.4 Board Component Locations ................................................................................................................... 6 System Block Diagram ............................................................................................................................. 7 Product Dimensions (unit: mm) ............................................................................................................... 8 Chapter 2 Introduction to Hardware System ........................................................................................................... 9 2.1 Minimum System ..................................................................................................................................... 9 2.1.1 CPU............................................................................................................................................... 9 2.1.2 Memory ..................................................................................................................................... 10 2.1.3 PMIC ........................................................................................................................................... 14 2.2 External interface................................................................................................................................... 15 2.2.1 LED ............................................................................................................................................. 16 2.2.2 Button and DIP Switch ............................................................................................................... 16 2.2.3 Ethernet ..................................................................................................................................... 18 2.2.4 USB ............................................................................................................................................. 19 2.2.5 UART .......................................................................................................................................... 20 2.2.6 WLAN+Bluetooth ....................................................................................................................... 21 2.2.7 RS485 ......................................................................................................................................... 23 2.2.8 CAN ............................................................................................................................................ 24 2.2.9 MicroSD ..................................................................................................................................... 25 2.2.10 LCD ............................................................................................................................................. 26 2.2.11 Camera ....................................................................................................................................... 28 2.2.12 Expansion Interface ................................................................................................................... 30 Technical Support and Warranty ............................................................................................................................... 34 Embest Technology Co. Ltd | http://www.embest-tech.com 4 SBC-EC8800 User Manual Chapter 1 Product Overview 1.1 Brief Introduction SBC-EC8800 is designed by Embest Technology Co., Ltd, targeting on medical instruments, industrial control, communications and other fields launched an evaluation board based on TI AM437x. This processor integrates up to 1GHz ARM Cortex-A9 core and provides rich peripheral interfaces. SBC-EC8800 can provide a series of expansion peripheral interfaces, including one network interface, one USB 2.0 Host interface and one USB 2.0 OTG interface, one debug UART interface, one TFT screen and resistive touch screen interface, one camera interface, one MicroSD card interface, one WLAN+Bluetooth interface. In addition, from the expansion headers, there are a number of other signals including one RS485, two CAN, two I2C, two UART, one RGMII, one SPI, one MCASP, four ADC, three PWM and two GPIO etc. SBC-EC8800 has a very wide range of application scenarios to meet, including gaming peripherals, home and industrial automation, consumer medical devices, printers, intelligent charging system, intelligent vending machines, weighing system, terminal education, toys, and so on, in all areas of different needs. 1.1.1 Packing List SBC-EC8800 Evaluation Board X1 Desiccant X1 Antistatic Bag X1 Generic Safety Leaflet X1 Quick Start Guide X1 Packing Box X1 1.1.2 Product Features Electrical Features Operating Temperature: 0~70CCommercial, -40~85CIndustrial Power Supply: 5V/2A (The power adapter with short circuit current limit) Operating Humidity: 20% ~ 90%no condensation Main Board Size: 100 mm 65 mm PCB Specification: 8 layer design Processor Features 1000 MHz ARM Cortex-A9 32-Bit RISC Microprocessor SGX530 Graphics Engine Embest Technology Co. Ltd | http://www.embest-tech.com 5 Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-ICSS) Real-Time Clock (RTC) Onboard Hardware Features:
SBC-EC8800 User Manual 1GB DDR3 SDRAM 4GB eMMC Flash 32KB EEPROM 32MB QSPI Flash Three LED, one is power LED, the other two are user LED One Gigabit Ethernet interface, RJ45 terminal One USB 2.0 Host interface, one USB 2.0 OTG interface One TFT screen and resistive touch screen One camera interface One MicroSD card interface One debug UART Three buttons, one of which is power button, one is reset button, and one is boot button One WLAN+Bluetooth interface With two 40Pin 2.54mm pitch connectorsincluding one RS485, two CAN, two I2C, two UART, one RGMII, one SPI, one MCASP, four ADC, three PWM and two GPIO etc. 1.2 Board Component Locations Embest Technology Co. Ltd | http://www.embest-tech.com 6 Figure 1-1. SBC-EC8800 Top Figure 1-2. SBC-EC8800 Bottom 1.3 System Block Diagram SBC-EC8800 User Manual Figure 1-3. SBC-EC8800 System Block Diagram Embest Technology Co. Ltd | http://www.embest-tech.com 7 1.4 Product Dimensions (unit: mm) SBC-EC8800 User Manual Figure 1-4. Product Dimensions Embest Technology Co. Ltd | http://www.embest-tech.com 8 Chapter 2 Introduction to Hardware System This chapter will introduce the structure, expansion and peripheral interfaces of SBC-EC8800 hardware system in SBC-EC8800 User Manual detail. 2.1 Minimum System The minimum unit of hardware system is generally composed of CPU, Memory and Management Power. SBC-EC8800 is no exception, and this section mainly introduces the three parts. 2.1.1 CPU The SBC-EC8800 uses the AM4378 from TI as the CPU and AM4378 is a member of TI AM437x series. The series of high performance processor based on ARM Cortex-A9 core. The processors are enhanced with 3D graphics acceleration for rich graphical user interfaces, as well as a coprocessor for deterministic, real-time processing including industrial communication protocols, such as EtherCAT, PROFIBUS, EnDat, and others. These devices offer an upgrade to systems based on lower performance ARM cores and provide updated peripherals, including memory options such as QSPI-NOR and LPDDR2. The processors contain the subsystems shown in Figure 2-1, and a brief description of each follows. The processor subsystem is based on the ARM Cortex-A9 core, and the POWERVR SGX graphics accelerator subsystem provides 3D graphics acceleration to support display and advanced user interfaces. The programmable real-time unit subsystem and industrial communication subsystem (PRU-ICSS) is separate from the ARM core and allows independent operation and clocking for greater efficiency and flexibility. The PRU-ICSS enables additional peripheral interfaces and real-time protocols such as EtherCAT, PROFINET, EtherNet/IP, PROFIBUS, Ethernet Powerlink, Sercos, EnDat, and others. The PRU-ICSS enables EnDat and another industrial communication protocol in parallel. Additionally, the programmable nature of the PRU-ICSS, along with their access to pins, events and all system-on-chip (SoC) resources, provides flexibility in implementing fast real-time responses, specialized data handling operations, custom peripheral interfaces, and in off-loading tasks from the other processor cores of the SoC. High-performance interconnects provide high-bandwidth data transfers for multiple initiators to the internal and external memory controllers and to on-chip peripherals. The device also offers a comprehensive clock-management scheme. One on-chip analog to digital converter (ADC0) can couple with the display subsystem to provide an integrated touch-screen solution. The other ADC (ADC1) can combine with the pulse width module to create a closed-loop motor control solution. Embest Technology Co. Ltd | http://www.embest-tech.com 9 SBC-EC8800 User Manual The real-time clock (RTC) provides a clock reference on a separate power domain. The clock reference enables a battery-backed clock reference. The camera interface offers configuration for a single- or dual-camera parallel port. Cryptographic acceleration is available in every AM437x device. Secure boot can also be made available for anticloning and illegal software update protection. Figure 2-1. Functional Block Diagram 2.1.2 Memory DDR3 AM437x provides a memory controller for the expansion of external dynamic storage space. SBC-EC8800 extends two DDR3L SDRAM devices from Micron (The part number is MT41K256M16TW-107), and can provide 1GB external RAM access space. Embest Technology Co. Ltd | http://www.embest-tech.com 10 Schematic as shown below:
SBC-EC8800 User Manual QSPI Flash Figure 2-2. DDR3 SBC-EC8800 board contains a 32MB QSPI Flash, model for N25Q256A13EF840. The QSPI can be used for booting, and the remaining storage space can also be used to store file. If QSPI Flash has been burned to a boot loader, SBC-EC8800 will run the software system from QSPI Flash, detailed in the introduction, referring to the software manual. Schematic as shown below:
Embest Technology Co. Ltd | http://www.embest-tech.com 11 SBC-EC8800 User Manual Figure 2-3. QSPI Flash eMMC Flash AM437x provides three MMC interfaces, that can support the memory card and eMMC memory, SBC-EC8800 board contains a 4GB eMMC Flash, using MMC1 bus. Schematic as shown below:
Embest Technology Co. Ltd | http://www.embest-tech.com 12 SBC-EC8800 User Manual Figure 2-4. eMMC EEPROM SBC-EC8800 board contains a 32KB EEPROM, by P/N CAT24C256W. As a non-volatile memory, the memory can be used to store some important information, such as the board configuration information, etc. Schematic as shown below:
Embest Technology Co. Ltd | http://www.embest-tech.com 13 SBC-EC8800 User Manual Figure 2-5. EEPROM 2.1.3 PMIC SBC-EC8800 board contains the power management chip TPS65218, the chip is a high-performance PMIC launched by TI for AM437x and AM335x specifically, including the multi-channel power output, used to support the various power for AM437x. SBC-EC8800 is powered through the DC power supply socket J7 with recommended input voltage 5V, ranged from 4.5V to 5.5V. When the input voltage exceeds 5.5V, the power input protection circuit will disconnect the input power supply and PMIC chip connection automatically, and the red LED D7 which is the over voltage indicator will turn on. When the input power supply voltage is normal, the D7 will turn off, and the green LED D10 will turn on, it means that PMIC is working normally. The RTC backup power supply is used through the J12, the recommended use of 3V coin-cell battery, allowing the voltage range of 2.2V to 3.3V. If not use, this interface cannot be connected, and be left floating. Schematic as shown below:
Figure 2-6. Input Power Overvoltage Protection Circuit Embest Technology Co. Ltd | http://www.embest-tech.com 14 SBC-EC8800 User Manual Figure 2-7. Input Power Overvoltage Indicator LED Figure 2-8. PMIC Circuit 2.2 External interface To make users understand the boards hardware circuit better, this section will describe the structure, working principle, interface definition, etc. Embest Technology Co. Ltd | http://www.embest-tech.com 15 2.2.1 LED There are three green LED on the SBC-EC8800. D10 is 3.3V power indicator LED, and be on when the system is being powered on; D8 and D9 are programmable LED, user can control the LED using GPIO. SBC-EC8800 User Manual Figure 2-9. LED 2.2.2 Button and DIP Switch SBC-EC8800 provides three buttons and one DIP switch, which SW1 for the Power ON/OFF button, SW2 for the Reset button, SW4 for the Boot selection button, SW3 for the Boot select DIP switch, respectively, as follows:
Power ON/OFF Button SW1 is connected to the Pin44 of U16 which is the PMIC, can be used to power-up the board. If you want to know more information about the Pin, please refer to the Datasheet of TPS65218. The button is DNP (Do Not Place) by default, so the power output of the SBC-EC8800 is not controlled by this button, that is, when the power supply to the board, PMIC will power on automatically. Embest Technology Co. Ltd | http://www.embest-tech.com 16 SBC-EC8800 User Manual Figure 2-10. Power ON/OFF Button Reset Button SW2 for the hardware reset button, press this button, the system will reset, than reboot the board. Figure 2-11. Reset Button Boot Configuration Button SW4 is the Boot configuration button, and can be configured to change the boot order. Without holding the button, the board will try to boot from the QSPI Flash. If it is empty, then it will try booting from the MicroSD slot. If you hold the boot switch down during the removal and reapplication of power to the board, and you have a MicroSD card inserted with a bootable image, the board will boot from the MicroSD card. Figure 2-12. Boot Configuration Button Boot Configuration DIP Switch Embest Technology Co. Ltd | http://www.embest-tech.com 17 SBC-EC8800 User Manual SW3 is a four-channel DIP switch, the DIP switch and the surrounding components constitute a group of Boot configuration circuit, this part of the circuit has the same functions with SW4, and can configure the board booting from the QSPI flash, or MicroSD card. This part of the circuit is a backup circuit, so these components are not placed standard on the board. To use this, these components in Figure 2-13 will need to be soldered onto the board. Figure 2-13. Boot Configuration DIP Switch 2.2.3 Ethernet SBC-EC8800 provides a 10/100/1000 Mbps three speed Ethernet interface, RGMII1 as the use of bus, PHY transceiver using MICREL company's KSZ9031, interface through the RJ45 terminal, the part reference number is J8, schematic as shown below:
Embest Technology Co. Ltd | http://www.embest-tech.com 18 SBC-EC8800 User Manual Figure 2-14. Ethernet Circuit 2.2.4 USB SBC-EC8800 provides two USB 2.0 interfaces. The power switch IC is SP2526A-1EN-L which is a dual USB high-side power switch. Each USB can supply 5V 500mA minimum, and the fault currents are limited to 1.0A typical and the flag output pin for each switch is available to indicate fault conditions to the CPU controller. The schematic as shown:
Embest Technology Co. Ltd | http://www.embest-tech.com Figure 2-15. USB Power 19 SBC-EC8800 User Manual USB0 is the OTG USB interface, which uses the standard Micro USB AB connector. The schematic as shown:
Figure 2-16. USB OTG USB1 is the Host USB interface, which uses a single USB Type A female connector. The schematic as shown:
2.2.5 UART Figure 2-17. USB Host There are four UARTs on SBC-EC8800 board, UART0 of these is the debug UART, to be input and output interface of the information from system as default. UART1 is connected to the expansion interface J11, UART3 with flow control is converted to RS485, and UART5 with flow control is connected to Bluetooth module and is multiplexed to J11. Embest Technology Co. Ltd | http://www.embest-tech.com 20 Debug UART0 is isolated by the buffer chip SN74LVC2G241, and is connected to J13 which is 2.54MM connector. SBC-EC8800 User Manual And the level of signal is 3.3V CMOS. The schematic as shown below:
Figure 2-18. Debug UART 2.2.6 WLAN+Bluetooth SBC-EC8800 provides one WLAN+Bluetooth interface, the function block diagram as the Figure 2-19. Please refer to the schematic and datasheet of WG7831-D0 for more information. NOTE:
This equipment must be installed and operated in accordance with provided instructions and the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. Embest Technology Co. Ltd | http://www.embest-tech.com 21 SBC-EC8800 User Manual Figure 2-19. WLAN+Bluetooth Function Block Diagram WLAN and Bluetooth Features as follows:
WLAN Features Integrated 2.4 GHz Power Amplifier (PA) for WLAN solution WLAN MAC Baseband Processor and RF transceiver - IEEE802.11b/g/n compliant WLAN 11n 40MHz (SISO) and 11n 20MHz (SISO) Baseband Processor IEEE Std 802.11b/g/n data rates and IEEE Std 802.11n data rates up to 40 MHz SISO Fully calibrated system. No production calibration required Medium Access Controller (MAC) Embedded ARM Central Processing Unit (CPU) Hardware-Based Encryption/Decryption using 64-, 128-, and 256-Bit WEP, TKIP or AES Keys Embest Technology Co. Ltd | http://www.embest-tech.com 22 Supports requirements for Wireless Fidelity (Wi-Fi) Protected Access (WPA and WPA2.0) and IEEE Std 802.11i [includes hardware-accelerated Advanced Encryption Standard (AES)]
SBC-EC8800 User Manual Designed to work with IEEE Std 802.1x IEEE Std 802.11d, e, h, i, k, r PICS compliant New advanced co-existence scheme with BT 802.11V supports for high-precision timing and location approximation Supports 4 bit SDIO host interface, including high speed (HS) and V3 modes Bluetooth Features Supports Bluetooth 4.0 BLE Includes built -in coexistence and prioritization handling for BT, BLE, ANT, and WLAN Dedicated Audio processor supporting on chip SBC encoding + A2DP:
Assisted A2DP (A3DP) support - SBC encoding implemented internally Assisted WB-Speech (AWBS) support - modified SBC codec implemented internally 2.2.7 RS485 SBC-EC8800 provides one RS485 interface, using the ADM3485 from Analog Devices as the transceiver IC, networking applications as follows:
Figure 2-20. RS485 Networking The board uses UART3 to achieve RS485 communication with the ESD protection. The RS485 bus is connected to the expansion interface J5. The schematic as follows:
Embest Technology Co. Ltd | http://www.embest-tech.com 23 SBC-EC8800 User Manual Figure 2-21. RS485 Bus 2.2.8 CAN SBC-EC8800 provides two CAN buses with ESD protection, The CAN controller is integrated in the CPU, and the transceiver uses MC33901 from NXP. Two CAN buses are connected to the expansion interface J5. The schematic as follows:
Embest Technology Co. Ltd | http://www.embest-tech.com 24 SBC-EC8800 User Manual 2.2.9 MicroSD Figure 2-22. CAN Bus A MicroSD connector is located on the backside of the board, and the bus uses MMC0, 4bit data width. Embest Technology Co. Ltd | http://www.embest-tech.com 25 Figure 2-23. MicroSD 2.2.10 LCD SBC-EC8800 provides one 24Bit RGB LCD interface, the part location number is J1, interface definition and signal description as shown in Figure 2-24 and Table 2-1:
SBC-EC8800 User Manual Figure 2-24. LCD Interface Table 2-1. LCD Interface J1 Specification Pin Signal Name Direction Type / Tolerance Description 1 2 3 4 LCD_DATA0 Output CMOS 3.3V LCD_DATA1 Output CMOS 3.3V LCD_DATA2 Output CMOS 3.3V LCD_DATA3 Output CMOS 3.3V 8 bit Blue color data Embest Technology Co. Ltd | http://www.embest-tech.com 26 SBC-EC8800 User Manual 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 LCD_DATA4 Output CMOS 3.3V LCD_DATA5 Output CMOS 3.3V LCD_DATA6 Output CMOS 3.3V LCD_DATA7 Output CMOS 3.3V GND Ground Signal and power return, and GND reference LCD_DATA8 Output CMOS 3.3V LCD_DATA9 Output CMOS 3.3V LCD_DATA10 Output CMOS 3.3V LCD_DATA11 Output CMOS 3.3V LCD_DATA12 Output CMOS 3.3V LCD_DATA13 Output CMOS 3.3V LCD_DATA14 Output CMOS 3.3V LCD_DATA15 Output CMOS 3.3V 8 bit Green color data GND LCD_DATA16 Output Ground Signal and power return, and GND reference CMOS 3.3V LCD_DATA17 Output CMOS 3.3V LCD_DATA18 Output CMOS 3.3V LCD_DATA19 Output CMOS 3.3V LCD_DATA20 Output CMOS 3.3V LCD_DATA21 Output CMOS 3.3V LCD_DATA22 Output CMOS 3.3V LCD_DATA23 Output CMOS 3.3V 8 bit RED color data GND LCD_DE Output Ground Signal and power return, and GND reference CMOS 3.3V Display Enable LCD_HSYNC Output CMOS 3.3V Horizontal Sync LCD_VSYNC Output CMOS 3.3V Vertical Synch GND LCD_CLK GND ADC0_AIN0 ADC0_AIN1 ADC0_AIN2 ADC0_AIN3 Output Input Input Input Input Ground Signal and power return, and GND reference CMOS 3.3V Pixel clock Ground Signal and power return, and GND reference Analog 1.8V Analog Signal input Analog 1.8V Analog Signal input Analog 1.8V Analog Signal input Analog 1.8V Analog Signal input SPI2_CLK Output CMOS 3.3V SPI Master Clock output 39 SPI2_D0 Output CMOS 3.3V SPI Master Data output (output from CPU, input to SPI device) 40 SPI2_D1 Input CMOS 3.3V SPI Master Data input (input to CPU, output from SPI Embest Technology Co. Ltd | http://www.embest-tech.com 27 SBC-EC8800 User Manual device) SPI2_CS3 Output CMOS 3.3V SPI Master Chip Select output I2C1_SCL Bi-Dir OD CMOS 3.3V I2C data signal I2C1_SDA Bi-Dir OD CMOS 3.3V I2C clock signal GND 3V3_LCD 3V3_LCD 5V_LCD 5V_LCD Output Ground Signal and power return, and GND reference Power 3.3V Power 3.3V output Output Power 3.3V Power 3.3V output Output Power 5V Power 5V output Output Power 5V Power 5V output SYS_RESETn Output CMOS 3.3V General purpose reset output LCD_PWM Output CMOS 3.3V Display backlight PWM control GND GND Ground Ground Board Lock, Connect to GND Board Lock, Connect to GND 41 42 43 44 45 46 47 48 49 50 51 52 2.2.11 Camera SBC-EC8800 provides one 12Bit Camera interface, the part location number is J3, interface definition and signal description as shown in Figure 2-25 and Table 2-2:
Figure 2-25. Camera Interface Embest Technology Co. Ltd | http://www.embest-tech.com 28 Table 2-2. Camera Interface J3 Specification Pin Signal Name Direction Type / Tolerance Description SBC-EC8800 User Manual GND Ground Signal and power return, and GND reference CAM0_DATA0 Input CMOS 3.3V CAM0_DATA1 Input CMOS 3.3V CAM0_DATA2 Input CMOS 3.3V CAM0_DATA3 Input CMOS 3.3V CAM0_DATA4 Input CMOS 3.3V CAM0_DATA5 Input CMOS 3.3V CAM0_DATA6 Input CMOS 3.3V CAM0_DATA7 Input CMOS 3.3V CAM0_DATA8 Input CMOS 3.3V CAM0_DATA9 Input CMOS 3.3V CAM0_DATA10 Input CMOS 3.3V CAM0_DATA11 Input CMOS 3.3V Parallel camera input data GND Ground Signal and power return, and GND reference CAM0_PCLK Input CMOS 3.3V CCD Data Pixel Clock GND Ground Signal and power return, and GND reference CAM0_HSYNC Input CMOS 3.3V CCD Data Horizontal Detect 5V_CAM Output Power 5V Power 5V output CAM0_VSYNC Input CMOS 3.3V CCD Data Vertical Detect 3V3_CAM Output Power 3.3V Power 3.3V output CAM0_XCLK Output CMOS 3.3V Parallel camera Master Clock output RESERVED Output CMOS 3.3V No signal GND CAM0_FIELD CAM0_WEN Input Input Ground Signal and power return, and GND reference CMOS 3.3V CCD Data Field Indicator CMOS 3.3V CCD Data Write Enable CAM0_STROBE Output CMOS 3.3V GPIO I2C1_SDA Bi-Dir OD CMOS 3.3V I2C data signal I2C1_SCL Bi-Dir OD CMOS 3.3V I2C clock signal GND Ground Signal and power return, and GND reference 3V3_CAM Output Power 3.3V Power 3.3V output GND GND Ground Ground Board Lock, Connect to GND Board Lock, Connect to GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Embest Technology Co. Ltd | http://www.embest-tech.com 29 SBC-EC8800 User Manual 2.2.12 Expansion Interface There are some unused IOs from AM437x in SBC-EC8800, and are connected to the J5 and J11 which are 2*20Pin expansion headers. These IOs can be used as GPIO, and also can be configured as bus, such as SPI, IIC, etc. There are one RS485 and two CAN bus in J5, and can be used as serial interfaces. Interface definition and signal description as shown in Figure 2-26, Table 2-3 and Table 2-4:
Figure 2-26. Expansion Connectors Table 2-3. Expansion Connector J5 Specification Pin Signal Name Direction Type / Tolerance Description 1 2 3 4 5 6 7 8 9 10 11 12 13 VDD_5V V3_3D_B VDD_5V V3_3D_B GND GND ADC0_AIN4 ADC0_AIN5 ADC0_AIN6 ADC0_AIN7 GND GND Output Output Output Output Input Input Input Input Power 5V Power 5V output Power 3.3V Power 3.3V output Power 5V Power 5V output Power 3.3V Power 3.3V output Ground Ground Signal and power return, and GND reference Signal and power return, and GND reference Analog 1.8V Analog Signal input Analog 1.8V Analog Signal input Analog 1.8V Analog Signal input Analog 1.8V Analog Signal input Ground Ground Signal and power return, and GND reference Signal and power return, and GND reference SPI4_CLK Output CMOS 3.3V SPI Master Clock output Embest Technology Co. Ltd | http://www.embest-tech.com 30 SBC-EC8800 User Manual 14 SPI4_CS0 Output CMOS 3.3V SPI Master Chip Select output 15 SPI4_D0 Output CMOS 3.3V SPI Master Data output (output from CPU, input to SPI device) 16 UART3_CTS Input CMOS 3.3V SPI4_CS1 17 SPI4_D1 Input CMOS 3.3V SPI Master Data input (input to CPU, output from SPI device) GND Ground Signal and power return, and GND reference SYS_RESETn Output CMOS 3.3V General purpose reset output UART5_TXD Output CMOS 3.3V UART Transmit Data EHRPWM1A Output CMOS 3.3V PWM(Pulse Width Modulation) Out UART5_RXD Input CMOS 3.3V UART Receive Data EHRPWM0A Output CMOS 3.3V PWM(Pulse Width Modulation) Out UART5_CTS Input CMOS 3.3V UART Clear to Send EHRPWM0B Output CMOS 3.3V PWM(Pulse Width Modulation) Out UART5_RTS Output CMOS 3.3V UART Request to Send GPIO_1 GPIO_2 Bi-Dir Bi-Dir CMOS 3.3V General purpose input/output CMOS 3.3V General purpose input/output ETH_MDIO_DA TA ETH_MDIO_CL K GND GND CAN0_H CAN1_H CAN0_L CAN1_L GND GND RS485_A RS485_B Bi-Dir OD CMOS 3.3V MDIO Data Bi-Dir OD CMOS 3.3V MDIO CLK Bi-Dir Bi-Dir Bi-Dir Bi-Dir Bi-Dir Bi-Dir Ground Ground CAN CAN CAN CAN Ground Ground RS485 RS485 Signal and power return, and GND reference Signal and power return, and GND reference CAN Differential Signal +
CAN Differential Signal +
CAN Differential Signal -
CAN Differential Signal -
Signal and power return, and GND reference Signal and power return, and GND reference RS485 Differential Signal +
RS485 Differential Signal -
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Table 2-4. Expansion Connector J11 Specification Pin Signal Name Direction Type / Tolerance Description 1 2 V3_3D_B VDD_5V Output Output Power 3.3V Power 3.3V output Power 5V Power 5V output Embest Technology Co. Ltd | http://www.embest-tech.com 31 SBC-EC8800 User Manual 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 I2C2_SDA Bi-Dir OD CMOS 3.3V I2C data signal VDD_5V I2C2_SCL GND MCASP0_CLKO UT1 Output Power 5V Power 5V output Bi-Dir OD CMOS 3.3V I2C clock signal Ground Signal and power return, and GND reference Output CMOS 3.3V McASP0 Master clock output to Audio codec UART1_TXD Output CMOS 3.3V UART Transmit Data GND Ground Signal and power return, and GND reference UART1_RXD Input CMOS 3.3V UART Receive Data RGMII2_TXD0 Output CMOS 3.3V RGMII Transmit Data bit 0 MCASP0_ACLK X Output CMOS 3.3V McASP0 Transmit Bit Clock RGMII2_TXD1 Output CMOS 3.3V RGMII Transmit Data bit 1 GND Ground Signal and power return, and GND reference RGMII2_TXD2 Output CMOS 3.3V RGMII Transmit Data bit 2 RGMII2_TXD3 Output CMOS 3.3V RGMII Transmit Data bit 3 V3_3D_B Output Power 3.3V Power 3.3V output RGMII2_TXCTL Output CMOS 3.3V RGMII Transmit Control 19 SPI2_D0 Output CMOS 3.3V SPI Master Data output (output from CPU, input to SPI device) 20 GND Ground Signal and power return, and GND reference 21 SPI2_D1 Input CMOS 3.3V SPI Master Data input (input to CPU, output from SPI device) 22 23 24 25 26 27 28 29 30 31 32 33 34 RGMII2_TXCLK Output CMOS 3.3V RGMII Transmit Clock SPI2_CLK SPI2_CS0 GND Output Output CMOS 3.3V SPI Master Clock output CMOS 3.3V SPI Master Chip Select output Ground Signal and power return, and GND reference SPI2_CS3 Output CMOS 3.3V SPI Master Chip Select output ID_I2C0_SDA Bi-Dir OD CMOS 3.3V I2C data signal ID_I2C0_SCL Bi-Dir OD CMOS 3.3V I2C clock signal RGMII2_RXD0 Input CMOS 3.3V RGMII Receive Data bit 0 GND Ground Signal and power return, and GND reference RGMII2_RXD1 Input CMOS 3.3V RGMII Receive Data bit 1 RGMII2_RXD3 Input CMOS 3.3V RGMII Receive Data bit 3 RGMII2_RXD2 Input CMOS 3.3V RGMII Receive Data bit 2 GND Ground Signal and power return, and GND reference 35 MCASP0_FSX Output CMOS 3.3V McASP0 Transmit Frame Sync Embest Technology Co. Ltd | http://www.embest-tech.com 32 SBC-EC8800 User Manual 36 37 38 RGMII2_RXCTL Input CMOS 3.3V RGMII Receive Control RGMII2_RXCLK Input CMOS 3.3V RGMII Receive Clock MCASP0_AXR0 _OUT Output CMOS 3.3V McASP0 Serial Data Out 39 GND Ground Signal and power return, and GND reference 40 MCASP0_AXR1 _IN Input CMOS 3.3V McASP0 Serial Data In Embest Technology Co. Ltd | http://www.embest-tech.com 33 SBC-EC8800 User Manual Technical Support and Warranty Technical Support Embest Technology provides its product with one-year free technical support including:
Providing software and hardware resources related to the embedded products of Embest Technology;
Helping customers properly compile and run the source code provided by Embest Technology;
Providing technical support service if the embedded hardware products do not function properly under the circumstances that customers operate according to the instructions in the documents provided by Embest Technology;
Helping customers troubleshoot the products. The following conditions will not be covered by our technical support service. We will take appropriate measures accordingly:
Customers encounter issues related to software or hardware during their development process;
Customers encounter issues caused by any unauthorized alter to the embedded operating system;
Customers encounter issues related to their own applications Customers encounter issues caused by any unauthorized alter to the source code provided by Embest Technology. Warranty Conditions 1 12-month free warranty on the PCB under normal conditions of use since the sales of the product;
2 The following conditions are not covered by free services; Embest Technology will charge accordingly:
Customers fail to provide valid purchase vouchers or the product identification tag is damaged, unreadable, altered or inconsistent with the products;
Not according to the user's manual operation causes damage to the product;
Products are damaged in appearance or function caused by natural disasters (flood, fire, earthquake, lightning strike or typhoon) or natural aging of components or other force majeure;
Products are damaged in appearance or function caused by power failure, external forces, water, animals or foreign materials;
Embest Technology Co. Ltd | http://www.embest-tech.com 34 SBC-EC8800 User Manual Products malfunction caused by disassembly or alter of components by customers or, products disassembled or repaired by persons or organizations unauthorized by Embest Technology, or altered in factory specifications, or configured or expanded with the components that are not provided or recognized by Embest Technology and the resulted damage in appearance or function;
Product failures caused by the software or system installed by customers or inappropriate settings of software or computer viruses;;
Products purchased from unauthorized sales;
Warranty (including verbal and written) that is not made by Embest Technology and not included in the scope of our warranty should be fulfilled by the party who committed. Embest Technology has no any responsibility;
3 Within the period of warranty, the freight for sending products from customers to Embest Technology should be paid by customers; the freight from Embest to customers should be paid by us. The freight in any direction occurs after warranty period should be paid by customers;
4 Please contact technical support if there is any repair request. Note:
Embest Technology will not take any responsibility on the products sent back without the permission of the Contact Information company. Technical Support Tel: +86-755-25635626-872/875/897 Email: support@embest-tech.com Sales Information Tel: +86-755-25635626-860/861/862 Fax: +86-755-25616057 Email: chinasales@embest-tech.com Company Information Wabsite: http://www.embest-tech.cn Embest Technology Co. Ltd | http://www.embest-tech.com 35 Address: Tower B 4/F,Shanshui Building,Nanshan Yungu Innovation Industry Park,Liuxian Ave.No.1183,Nanshan SBC-EC8800 User Manual District,Shenzhen,Guangdong,China Embest Technology Co. Ltd | http://www.embest-tech.com 36