FCC ID: TE6DM1800 TRANSMITTER-MODULAR APPROVAL

DM1800-

916MB 916.50 MHz Transceiver Module Preliminary

Base Station with Host Serial Interface

Compatible with RFM miniMESHTM Network Protocol

3 V, Very Low Current Operation

Ready-to-Use OEM Module The DM1800-916MB is the 916.50 MHz base station module in the DM1800 family of RF transceiv-

ers. The DM1800 family is designed for adding embedded wireless connectivity to a wide range of monitoring and control systems. The DM1800-916MB is equipped with a serial I/O port to interface to a host microcontroller. The module also includes an analog input, a logic input, and a logic output for local monitoring and control. Radio communications range in an open field environment is typi-

cally 200 meters/hop. The DM1800-916MB combines RFMs very low current ASH radio technol-

ogy with low power microcontroller technology to achieve long battery life. This module is compatible with RFMs miniMESHTM network protocol, which provides add-on plug-and-play multicast mesh network routing. The DM1800-916MB is certified for operation under FCC 15.249 regulations. Absolute Maximum Ratings Rating All Input/Output Pins Except VIN Non-Operating Ambient Temperature Range Electrical Characteristics Value Units

-0.3 to +3.3

-50 to +100 V oC Characteristic Sym Notes Minimum Typical Maximum Units Operating Frequency Modulation Type RF Encoded Data Transmission Rate Average Receiver Input Current, No External Power Supply Load Receiver Input Signal for 10-3 BER, 25 C Peak Transmitter Input Current, No External Power Supply Load Peak Transmitter Output Power Analog Input Measurement Range (10-bit ADC) Source Impedance to Analog Input fO IR ITP PO Digital In Logic High Digital In Logic Low Digital Out Logic High, No Load Digital In Logic Low, No Load Digital Output Source Current, 1K load Digital Output Sink Current, 1K load Serial Port Data Rate Power Supply Input Voltage Range, -40 to +85 oC Power Supply Input Voltage Range, 0 to +85 oC Regulated Power Supply Output Voltage, VIN 3.1 to 14 V Regulated Power Supply Voltage Ripple VIN VIN VOUT 1 916.30 916.70 MHz OOK 4.8 4

-98 1 1.1 1.2 9.6 3.0 kb/s mA dBm mA mW V K V V V V mA mA kb/s V V Vdc mVP-P 13.5 VOUT 10

.45 0.3 14 14 10 0 2.4 2.4 2.6 3.1 Figure 1 Theory of Operation The major components of the DM1800-916MB include an RFM TR1000 ASH transceiver and a Microchip PIC16F688 microcontroller. The TR1000 operates on a frequency of 916.50 MHz, at a nominal output power of 1 mW. The 16F688 provides a 9.6 kb/s serial interface for communication with a host microcontroller. A compan-

ion interface board is available with USB bridge cir-

cuitry to interface the DM1800-916MB to a host PC. Three of the 16F688 I/O pins are configured for exter-

nal monitoring or control. Digital In is configured as a logic input with a weak pull-up for sensing a contact closure to a ground pad. Digital Out is configured a logic output. Analog In is configured as a 10-bit ana-

log-to-digital input. The DM1800 includes two LEDs that indicate the modules operating mode. This certification applies only when a DM1800-916MB is equipped with one of the following RFM antennas:

helical antenna, RFM part number 500-1195-003 helical antenna, RFM part number 500-1195-103 the DM1800-916MB must be re-certified WARNING:

if used with any antennas other than the two listed above. Contact RFM for further information if your ap-

plication requires a special antenna configuration. FCC Notices and Labels 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 re-

ceived, including interference that may cause unde-

sired operation. The DM1800-916MB is compatible with RFMs miniMESHTM network protocol, which provides add-on plug-and-play mesh network routing to improve com-

munication range and robustness. A clearly visible label is required on the outside of the users (OEM) enclosure stating that this product con-

tains a DM1800-916MB transceiver assembly, FCC ID: TE6-DM1800. DM1800-916MB FCC Certification The DM1800-916MB hardware has been certified for operation under FCC Part 15 Rules, Section 15.249. WARNING: This device operates under Part 15 of the FCC rules. Any modification to this device, not ex-

pressly authorized by RF Monolithics, Inc., may void the users authority to operate this device. 2 6

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DM1800-916MB I/O Pad Descriptions Pin J1-1 J1-2 Name Description GND This pad is a signal and power supply ground. VIN This is the power supply input pad. The allowed input voltage range is 2.6 to 14 V. J1-3 VOUT VOUT tracks 50 to 100 mV below VIN when VIN is in the range of 2.6 to 3.1 V. When VIN is in the range of 3.1 to 14 V, VOUT is regulated at 3.0 Vdc. Up to 10 mA can be supplied from this pad for powering external circuits such as thermistor-resistor networks. External circuitry must not impress more than 10 mVp-p ripple on the regu-

lated output voltage. J1-4 BIND This pad is connected to a logic input on the microcontroller, and is configured with a weak pull-up. When this pin is momentarily grounded (to J1-1 or J1-10, the module is placed into the bind mode, allowing this module to be associated with other modules to form a network. J1-5 DIGITAL IN This pad is connected to a logic input on the microcontroller, and is configured with a weak pull-up, allowing both logic signals and contact closures referenced to J-1 or J-10 to be read. The value of this input is sent over the RF channel as a response to an RF command. The input voltage range on this pad is 0 to VOUT. Applying a voltage outside of this range may damage the module. J1-6 ANALOG IN This pad in the input to the microcontrollers 10-bit analog-to-digital (ADC) converter. The ADC input range is 0 to VOUT, referenced to J1-1 or J1-10. The input voltage range on this pad is 0 to VOUT. Applying a voltage outside of this range may damage the module. The ADC reading is sent over the RF channel as a response to an RF command. J1-7 DIGITAL OUT This pad is connected to a logic output on the microcontroller through a 1 kilohm resistor, which provides short-circuit protection. The value of this output is set or read over the RF channel as a response to an RF com-

mand. J1-8 SERIAL RX This pad is connected to the modules serial data input (USART). Data to this pin is received at 9.6 kb/s, using 8 data bits, no parity, and one stop bit. The input voltage range on this pad is 0 to VOUT. Applying a voltage outside of this range may damage the module. J1-9 SERIAL TX This pad is connected to the modules serial data output (USART) through a 1 kilohm resistor, which provides short-circuit protection. Data from this pad is sent at 9.6 kb/s, using 8 data bits, no parity, and one stop bit. J1-10 J2-1 J2-2 J2-3 GND GND ANT GND This pad is a signal and power supply ground. This pad is a ground for the antenna port. This pad is the antenna port. This pad is a ground for the antenna port. 3 Figure 2 Figure 3 4 file: dm1800_916bk.vp, 2005.12.07 rev Note: Specifications subject to change without notice.

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