FCC ID: 2ARVF-MLU290 Intelligent Processing Card

Cambricon 1 MLU290-M5 Intelligent Accelerating Card Product Manual V0.2.0 Preliminary Copyright 2020 Cambricon Corporation Cambricon 1. Preface.............................................................................................................................................................. 1 1.1. Copyright Declaration ......................................................................................................................... 1 1.2. Version ..................................................................................................................................................... 2 1.3. Update history ....................................................................................................................................... 2 2. Overview .......................................................................................................................................................... 3 3. Product Specification Overview ............................................................................................................... 4 3.1 Overview of Product Specification Parameters............................................................................ 4 3.2 Overview of structure specifications................................................................................................ 5 3.3 Overview of Power Supply Specifications...................................................................................... 5 3.4 Overview of heat dissipation specifications .................................................................................. 5 3.5 Overview of interface specifications ................................................................................................ 6 4. Electrical specifications ............................................................................................................................... 7 4.1 Connector pin description .................................................................................................................. 7 4.2 Power supply requirements ............................................................................................................ 10 4.3 Signal description ............................................................................................................................... 11 5. Heat dissipation specifications .............................................................................................................. 18 5.1 Heat dissipation instructions ........................................................................................................... 18 5.2 Maximum operating temperature................................................................................................. 18 5.3 Slowdown temperature .................................................................................................................... 18 5.4 Shutdown temperature..................................................................................................................... 18 5.5 Air inlet temperature requirements .............................................................................................. 19 6. Cambricon NeuWare development environment .......................................................................... 20 7. Compliance .................................................................................................................................................. 21 Copyright 2020 Cambricon Corporation 2 Cambricon 1. Preface 1.1. Copyright Declaration Disclaimer Cambricon Technologies Corporation Limited(hereinafter referred to as "Cambricon ") does not represent, guarantee (express, implied or statutory) or guarantee the information contained in this document and expressly waives any and all implied guarantees of saleability, ownership, non-aggression of intellectual property or applicability for a specific purpose, and cambricon does not assume any liability arising from the application or use of any product or service. cambricon shall not be liable for any breach of contract, damages, costs or problems arising from :(1) any way of using cambricon products contrary to this Guide; or (2) customer product design. Limitation of liability In no case shall Cambricon be liable for any damage caused by the use or inability to use this Guide

(including but not limited to damage such as loss of profits, business disruption and loss of information), even if Cambricon has been advised that such damage may be suffered. Although the customer may suffer any damage for any reason, according to the terms and conditions of sale of the products of the Cambricon, the total and cumulative liability of Cambricon to the customer for the products described in this Guide shall be limited. Accuracy of information The information provided in this document is owned by Cambricon and Cambricon reserves the right to make any changes to this document information or to any products and services without notice. The information contained in this guide and all other information of the Cambricon documents cited in this guide are provided

"as is ". Cambricon does not guarantee the accuracy or completeness of information, texts, patterns, links or other items contained in this guide. Cambricon may make changes to this Guide or to the products described in this Guide without notice, but does not undertake to update this Guide. The performance tests and grades listed in this guide are to be measured using a specific chip or computer system or component. After such tests, the results shown in this guide reflect the general performance of Cambricon products. Any difference in system hardware or software design or configuration will affect actual performance. As mentioned above, Cambricon does not represent, warrant or guarantee that the products described in this Guide will apply for any particular purpose.Cambricon does not represent or guarantee testing all parameters of each product.The customer is solely responsible for ensuring that the product is suitable and applicable to the application of the customer plan and for performing the necessary tests on the application, Copyright 2020 Cambricon Corporation 1 Cambricon with a view to avoiding the default of the application or product. The fragility of customer product design can affect the quality and reliability of Cambricon products and lead to additional or different circumstances and/or requirements beyond the scope of this guide. Notice of Intellectual Property The Cambricon and Cambricon symbols are trademarks and/or registered trademarks of Cambricon Technologies Corporation Limited in the United States and other countries. Other companies and product names shall be trademarks of the respective companies associated with them. This guide is copyrighted and protected by the provisions of copyright laws and treaties worldwide.This guide can not be reproduced, reworked, modified, published, uploaded, published, transmitted or distributed in any way without the prior written permission of Cambricon. Except for the customer's right to use this guide information and products, according to this guide, Cambricon does not grant any other express or implied rights or permits. It is doubtful that the Cambricon does not grant any (express or implied) rights or permits to the customer based on any patent, copyright, trademark, trade secret or any other Cambricon intellectual property or ownership. Copyright Declaration 1.2. Version Cambricon Technologies Corporation Limited reserves all rights. 1Table 1.1 Version Record Document MLU290-M5 Intelligent Accelerating Card name Version number Author Date created Product Manual V0.2.0 Cambricon 2020.07.10 1.3. Update history V0.2.0 Update:

Update time: 2020.07.10

Initial version Copyright 2020 Cambricon Corporation 2 Cambricon 2. Overview MLU290-M5 is the first high performance Intelligent Accelerating Card for cloud data center in cambricon, which provides excellent performance and energy efficiency ratio. At the same time it supports heavy tasks such as deep learning training, large-scale data analysis, artificial intelligence reasoning and so on. MLU290-M5 supports cambricon adaptive precision training and provides up to 512 TOPs INT8 hashrate to align the data accuracy of training and reasoning business. MLU290-M5 provides inter-chip high speed interconnection technology CCLINK, supports cross-system direct connection, which can build large scale training clusters easily.The new vMLU function fully supports SRIOV, which can provide services by multiple virtual instances to give full play to computing efficiency. Copyright 2020 Cambricon Corporation 3 Cambricon 3. Product Specification Overview 3.1 Overview of Product Specification Parameters MLU290-M5 Intelligent Accelerating Card specification parameters are as follows:

1Table 3.1 MLU290-M5 Specification Parameters Integer speed (INT8) 512TOPS (Dense) Calculation accuracy support INT16,INT8,INT4,FP32,FP16 Specification indicators Product model Core architecture Core frequency Video decoding Memory capacity Memory width Memory bandwidth PCI identifier CCLINK interface CCLINK bandwidth TDP power consumption ECC protection Heat dissipation scheme Note MLU290-M5 Cambricon MLUv02 1GHz Support 32GB 4096- bit 1024GB/s 6Ports 600GB /S 350W Yes Passive PCIE Vendor ID 0xCABC PCIE Device ID 0x0290 PCIE Sub-Vendor ID xCABC 0 PCIE Sub-System ID 0x0012 System interface PCI Express 4.0x16, lane reversal supported Copyright 2020 Cambricon Corporation 4 Cambricon 3.2 Overview of structure specifications MLU290-M5 Intelligent Accelerating Card structure specifications:

2Table 3.2 MLU290-M5 Structure Specification Specification indicators Card shape Card Weight Minimum chip pressure Maximum chip pressure 102 mm*165mm,OAM standard Note 1.47 Kg 30PSI 60PSI Partner labelling area 16.1mm*40.2mm 3.3 Overview of Power Supply Specifications MLU290-M5 Intelligent Accelerating Card power specifications:

Specification indicators Note 3Table 3.3 MLU290-M5 Power Supply Specifications Input voltage DC54V5%6.48 A5%

Electrical data peak processing

(EDPp) 1.6X TDP 2ms 1.5X TDP 5ms 1.2X TDP 10ms 1.1X TDP 20ms 3.4 Overview of heat dissipation specifications MLU290-M5 Intelligent Accelerating Card heat dissipation specifications:

4Table 3.4 MLU290-M5 Heat dissipation Specifications Specification indicators MLU maximum operating temperature (Tj) MLU slowdown temperature (Tj) MLU shutdown temperature (Tj) Note 95 97 100 MLU power reduction ratio 1/2 to 1/8 Copyright 2020 Cambricon Corporation 5 Cambricon 3.5 Overview of interface specifications MLU290-M5 Intelligent Accelerating Card interface specifications:

5Table 3.5 MLU290-M5 Interface Specification Interface Note PF (1,64 bit):

BAR0256MB prefetchable BAR2256MB prefetchable BAR4256MB prefetchable VF (4,64 bit):

BAR0256MB prefetchable BAR2256MB prefetchable BAR4256MB prefetchable PCIE Base address SMBus (8bit address) 0 x8E (Write) 0x8F (Read) Copyright 2020 Cambricon Corporation 6 Cambricon 4. Electrical specifications 4.1 Connector pin description MLU290-M5 Intelligent Accelerating Card using two 688-pin Molex Mirror Mezz snap connectors.The design impedance of the connector is 905%, which can be compatible with both 85 and 100 protocols. The signal and power are connected to the main board through this connector, and the connector pin area is divided as follows:

1Figure 4.1 Connector pin area division The connector pins are shown in the following table:

1Table 4.1 MLU290-M5 connector arrangement of pin 0 Signal Direction of signal Signal description Voltage PWR_54V PVREF[1:0]

PETp/n [15:0]

I O O MLU290-M5 power input pin which support 40V-60V power supply MLU290-M5 JTAG interface, I/O signal and voltage indication signal ,1.8 V. PCIE signal sending. MLU290-M5 send, baseboard receive.Make sure that AC 40V-60V 1.8V

7 Copyright 2020 Cambricon Corporation Cambricon MODULE_PWRGD O MLU290-M5 power good indication signal I2C_SLV_D I/O coupling capacitor is placed near the fastener connector of the baseboard. The recommended capacitance value is 220 nF PCIE signal receiving. MLU290-M5 receive, baseboard send. Make sure that AC coupling capacitor is placed near the sending chip or fastener connector of the baseboard. The recommended capacitance value is 220 nF PCIE 100MHz reference clock MLU290-M5 reset signal, low level effective Baseboard power good indication signal Power brake, reduce to 1/4 of current power consumption, low level effective MLU290-M5 slot ID. MLU290-M5 internal default 10K pull-up resistor I2C data signal, MLU290-M5 works in slave mode slave mode mode I2C clock signal, MLU290-M5 working in I2C alarm signal, MLU290-M5 works in slave MLU290-M5 MCU UART serial port output MLU290-M5 MCU UART serial port input MLU290-M5 JTAG0 TRST reset signal MLU290-M5 JTAG0 TMS mode selection signal MLU290-M5 JTAG0 TCK clock signal PERp/n [15:0]

PE_REFCLKp/n PERST#

HOST_PWRGD PWRBRK#

MODULE_ID[4:0]

I2C_SLV_CLK I2C_SLV_ALERT#

UART_TXD UART_RXD JTAG0_TRST JTAG0_TMS JTAG0_TCK JTAG0_TDO JTAG0_TDI PRSNT0#

MANF_MODE#

FW_RECOVERY#

TEST_MODE#

RFU I I I I I I I I I I I I O O O I I I

O MLU290-M5 JTAG0 TDO data output signal MLU290-M5 JTAG0 TDI data input signal MLU290-M5 fastener connector 0 in position signal, MLU290-M5 default 1K pull-down 1.8V or resistor. Recommend 10K pull-up resistor 3.3V on baseboard. Undefined functions Undefined functions Test mode. NC is acceptable Reserved pin 2Table 4.2 MLU290-M5 connector arrangement of pin 1 Signal Direction of signal Signal description Copyright 2020 Cambricon Corporation

3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 1.8V 1.8V 1.8V 1.8V 1.8V 1.8V or 3.3V 3.3V 3.3V

Voltage voltage 8 THERMTRIP#

O automatically shut down, please check the 3.3V AUX_156M_REFCLKp/n CClink 156.25MHz reference clock PWRRDT#[1:0]

3.3V Cambricon SERDES_4Tp/n [15:0]

SERDES_4Rp/n [15:0]

SERDES_5Tp/n [7:0]

SERDES_5Rp/n [7:0]

SERDES_6Tp/n [15:0]

SERDES_6Rp/n [15:0]

SERDES_7Tp/n [15:8]

SERDES_7Rp/n [15:8]

LINK_CONFIG[4:0]

PE_BIF[1:0]

PLINK_CAP PRSNT1#

SCALE_DEBUG_EN DEBUG_PORT_PRSNT#

O O I I I I I O O I I O O O O I

CCLINK4[15:0] transmit signal CCLINK4[15:0] receiving signal CCLINK5[7:0] transmit signal CCLINK5[7:0] receiving signal CCLINK6[15:0] transmit signal CCLINK6[15:0] receiving signal CCLINK7[15:8] transmit signal CCLINK7[15:8] receiving signal TDP power setting pin, 3.3V pull-up is provided by the baseboard. 11L0 level, normal TDP power consumption 350 W default. 10L0 level,TDP power consumption reduced to 300 W. 01:L2 level,TDP power consumption reduced to 250 W. 00:L3 level,TDP power consumption reduced to 200 W. MLU290-M5 over-temperature alarm, which will trigger MLU290-M5 chassis fault (such as fan fault) and then restart the device, low level effective Serdes link configuration topology, MLU290-M5 internal default 10 K pull-up Indication of PCIE interface bit width :

MLU290-M5 default 00 00-1 x16( default) 01-2 x8 00-4 x4 00- Reserved M5 default 0 Support of PCIE port protocol : MLU290-

0= Only support PCIE protocol(default) 1= Support other protocols, reserved MLU290-M5 fastener connector 1 in

3.3V 3.3V or 1.8V 3.3V or 1.8V 3.3V 1.8V 9 position, MLU290-M5 default 1K pull-

3.3V or down resistor . Recommend 10K pull-up 1.8V resistor on baseboard. Undefined functions Baseboard debug port in position indication signal. NC is acceptable. RFU Reserved pin Copyright 2020 Cambricon Corporation Cambricon Note:connector signal pin list and pin map see attached document. 4.2 Power supply requirements 4.2.1 Input power supply MLU290-M5 Intelligent Accelerating Card input power requirements:

3Table 4.3 MLU290-M5 Input Power Specification Input voltage 54V5%

Note:

Input Current 6.48 A5%

1.The voltage value shall be the test value at the connector;

2.If the input voltage is low, the current value needs to be raised to meet TDP 350W specification;

4.2.2 Peak current of power supply MLU290-M5 Intelligent Accelerating Card is able to reduce power consumption adjustment for transient power changes above the s level. the power regulator can support power fluctuations within the ms level (e.g .1.2 x TDP). 4 Table 4.4 MLU290-M5 EDPp Specification EDP 1.6*TDP 1.5*TDP 1.2*TDP 1.1*TDP Duration 2 ms 5 ms 10 ms 20 ms 4.2.3 HSC protection circuit MLU290-M5 Intelligent Accelerating Card input voltage is DC 54V.Hot Swap Controllers (HSC) is required on the baseboard to provide slow start, short circuit protection and over-current/voltage protection for MLU290-M5. It is recommended to provide a separate HSC for each MLU290-M5. The transient power consumption need to support more than 2 ms within 1.6 *TDP.The block diagram of HSC is as follows:

Copyright 2020 Cambricon Corporation 10 Cambricon 54VDC In Fuse 20 Amp Littlfuse 456 MezzCard 0.1uF TVS GND 47uF Qty=6 10uF Qty=10 Hot Swap Mosfet Hot Swap Ckt GND 2Figure 4.2 HSC block diagram LM5069 and LM5066I of TI are recommended by the HSC controller.The selection of MOS should focus on SOA curve. Infineon IPB017N10N5LF and Nexperia PSMN4R8-100BSE are recommended. 4.2.4 Power on time sequence When MLU290-M5 Intelligent Accelerating Card power on normally with DC 54V voltage,the HOST_PWRGD signal is sent out after the reference clock (156.25MHz) is stable.Detailed timing sequence is as follows:

54V HOST_PWRGD AUX_156M_REFCLK

<4s

>100ms 3Figure 4.3 Power on Timing Sequence 4.3 Signal description 4.3.1 Clock signal AUX_156M_REFCLKp/n receiving support LVPECL,LVDS,CML,HCSL and other common differential level signal input.As a CCLINK high-speed SERDES reference clock, its phase noise jitter is required less than 270fs. 5 Table 4.5 AUX_156M_REFCLK Specifications Parameters Conditions Minimum Maximum Units value value Typical values Copyright 2020 Cambricon Corporation 11 Cambricon Frequency Frequency offset Maximum voltage value Minimum voltage value Differential swing Duty cycle

4.3.2 PCIE signal MHz PPM V V V

100 156.25

-100

GND 0.15 45

50

400 100 3.3

1.3 55 Phase noise jitter 12KHz 20MHz 270 fs RMS MLU290-M5 Intelligent Accelerating Card supports PCIE GEN4.0 x16 bit width default.There is no AC coupling capacitor in MLU290-M5. Sending and receiving AC coupling capacitors are placed on the baseboard and the value range is 176nF-265nF (220nF recommended). The placement position reference diagram is as follows:

BaseBorad TX 220nF RX 220nF MezzCrad RX TX CPU/Switch Mirror Mezz connector MLU290 4Figure 4.4 PCIE AC Coupled Capacitance jitter should be less than 0.5 ps. PE_REFCLK reference clock shall meet the requirements of PCIE GEN4.0 specification, phase noise Signal Direction of signal Signal description 6Table 4.6 PE_REFCLK Specifications PETp/n [15:0]

PERp/n [15:0]

O I PCIE sending signal. MLU290-M5 send, baseboard receive. PCIE receiving signal. MLU290-M5 receive, baseboard send. Copyright 2020 Cambricon Corporation 12 Cambricon PE_REFCLKp/n I PCIE 100MHz reference clock 4.3.3 CCLINK signal CCLINK is an internal connection link between MLU290-M5 Intelligent Accelerating Cards.The maximum transmission rate of CCLINK can be 50 Gbps PAM4, which is compatible with OAM specifications. SERDE _[31]R/T[15:0],SERDE _5R/T[15:8] and SERDE _7R/T[7:0] are not used in MLU290-M5. The 48 pairs of serdes in the table below are usedwhich are compatible with combine topology. For detailed internal connection topology please refer to the reference topology chapter. Signal Direction of signal Signal description 7Table 4.7 CCLINK Signal description SERDES_4Tp/n [15:0]

CCLINK4[15:0] transmit signal SERDES_4Rp/n [15:0]

CCLINK4[15:0] receiving signal SERDES_5Tp/n [7:0]

SERDES_5Rp/n [7:0]

CCLINK5[7:0] transmit signal CCLINK5[7:0] receiving signal SERDES_6Tp/n [15:0]

CCLINK6[15:0] transmit signal SERDES_6Rp/n [15:0]

CCLINK6[15:0] receiving signal SERDES_7Tp/n [15:8]

CCLINK7[15:8] transmit signal SERDES_7Rp/n [15:8]

CCLINK7[15:8] receiving signal O O I I I I O O 4.3.4 Other signals 4.3.4.1 SMBUS signal I2C_SLV_D /CLK/ALERT# satisfy the SMBus protocol and supports 400KHz max, with 8 bit addresses of 0x8E( write)/0x8F( read). MLU290-M5 works in slave mode. Signal Direction of signal Signal description 8Table 4.8 SMBUS Signal description I2C_SLV_D I2C_SLV_CLK I2C_SLV_ALERT#

I/O I2C data signal I O I2C clock signal I2C alarm signal SMBUS registers are described as follows:

Copyright 2020 Cambricon Corporation 13 Cambricon 9Table 4.9 SMBUS Register description Register definition Address Note Reading and writing RO RO RO Card power consumption 0x01 Power consumption, float, unit W Card Temperature Chip temperature power brake 0x02 0x03 0x05 Card temperature,float, unit Chip temperature,float, unit WO Main frequency reduce to 25% of current value when write 0x04, and recover to the frequency before reducing when write 0x01. PCIE Vendor ID and Device ID 0xA0 RO

[15:0] Vendor ID 0xCABC

[31:16] Device ID 0x0290 PCIE Sub-Vendor ID and 0xA1 RO

[15:0] Sub-Vendor ID 0xCABC Sub-System ID

[31:16] Sub-System ID 0x0042 PCIE _negotiated_speed 0xA2 RO Display PCIE negotiation rate, e.g .0 x 04 PCIE_negotiated_link_width 0xA3 R O Display PCIE negotiation width, e.g .0 Type of card Manufacturer 0xF0 0xF1 Hardware version number 0xF2 Display hardware version number Firmware version number 0xF3 RO RO RO RO indicate gen4 16GT/s x16 means X16. Display card type Display equipment manufacturer number Show firmware version number, e.g .0 x04420100 means master chip version number 0x04, card type 0x42master version number 0x01, sub version number 0x0 and patch number 0x0. Manufacturing time 0xF4 RO Display manufacturing time, e.g

.0 x2006 means manufactured in June Serial number 0xF5 RO Display the serial number of the device, e.g .0 x30001 indicating a serial number 2020 of 30001 Copyright 2020 Cambricon Corporation 14 Cambricon 4.3.4.2 THERMTRIP# overtemperature alarm signal THERMTRIP# is triggered when MLU290-M5 chip junction temperature is over 100, which is irreversible after effective. It is recommended to trigger fan full speed when the chip temperature of MLU290-M5 is below 93, trigger power drop to 1/2 when chip temperature rises to 97, trigger power drop to 1/4 when chip temperature rises to 98 , trigger power drop to 1/8 when chip temperature rises to 99.If the chip temperature rises to 100, which means the power reduction measures fail, the system may have fan failure or other catastrophic failures. At this time MLU290-M5 will pull down the THERMTRIP# signal to alarm baseboard management system. MLU290-M5 will automatically cut off the power supply for shutdown protection after 1s. THERMTRIP# signal will continue to be low after effective. It is recommended to confirm manually on site, and restart the system after troubleshooting. 4.3.4.3 Power Configuration Signal MLU290-M5 Intelligent Accelerating Card provides two power configuration pins:PWRBRK#

and PWRRDT#[10].PWRBRK# is based on the current power consumption and responses fast.When the current power consumption.PWRRDT#[10] is a hardware implementation mode of power capping, which can set 4 types of TDP power consumption: 350 W, 300W, 250W, 200. It is recommended that the baseboard should be pulled up to 3.3V by default to obtain better performance. is effective,it to 1/4 of low-level reduced is The MLU290-M5 Intelligent Accelerating Card also supports setting the upper limit of TDP power consumption by sending power capping instructions through the I2C interface, and the setting range is 175 W-350W. Signal 10Table 4.10 Power Configuration Signal Description Direction of signal Signal description PWRBRK#

PWRRDT#[1:0]

I I Power brake,power is reduced to 1/4 of current power consumption, low level is effective TDP power setting pin, baseboard must provide default 3.3 V high level 11 - L0 level, normal TDP power consumption 350 W, default 10 - L1 level,TDP power consumption reduced to 300 W 01 - L2 level,TDP power consumption reduced to 250 W 00 - L3 level,TDP power consumption reduced to 200 W Copyright 2020 Cambricon Corporation 15 Cambricon 4.3.4.4 Other configuration signals Signal 11Table 4.11 Other configuration signals descriptions Direction of signal Signal description MLU290-M5 slot ID. MLU290-M5 internal default 10 K pull up Serdes link configuration topology, MLU290-

M5 internal default 10 K pull up PCIE interface bit width indication: MLU290-M5 default 00 00-1 x16( default) 01-2 x8 00-4 x4 00- Reserved Support of PCIE port protocol: MLU290-M5 default value is 0 0= Only support PCIE protocol (default) 1= Support other agreements , reserved MODULE_ID[4:0]

LINK_CONFIG[4:0]

PE_BIF[1:0]

PLINK_CAP 4.3.4.5 Reserved signals The following signals are defined in OAM protocol, but not used in MLU290-M5,which are recommended to NC. 12Table 4.12 Reserved signal description Signal Direction of signal Signal description SCALE_DEBUG_EN O Undefined functions DEBUG_PORT_PRSNT#

Baseboard debug port in position indicator signal. NC MANF_MODE#

FW_RECOVERY#

Undefined functions Undefined functions Copyright 2020 Cambricon Corporation 16 I I O O I I I Cambricon TEST_MODE#

RFU NC Test mode. NC Reserved pin Suspension pin I

Copyright 2020 Cambricon Corporation 17 Cambricon 100. 5. Heat dissipation specifications 5.1 Heat dissipation instructions MLU290-M5 Intelligent Accelerating Card adopts passive heat dissipation mode. 5.2 Maximum operating temperature Maximum operating temperature means the recommended maximum operating temperature

(junction temperature Tj) of MLU290-M5. Junction temperature is obtained through the chip built-in temperature sensor at the software interface through instructions. It is recommended to control the maximum operating temperature of the main chip of MLU290-M5 below 95. 5.3 Slowdown temperature Slowdown temperature means the temperature point which the IPU frequency is reduced.The slowdown temperature of MLU290-M5 is 97. 5.4 Shutdown temperature Shutdown temperature means the temperature point which the power is cut off. The shutdown temperature should not be triggered during normal operation, and the system may have a catastrophic damage when the shutdown temperature is triggered. The shutdown temperature of MLU290-M5 is When the chip junction temperature of MLU290-M5 reaches 100, the THERMTRIP# signal will be triggered and the power supply of MLU290-M5 will be cut off after 1s. After the power is cut off, it is recommended to eliminate the heat dissipation problem manually before restart. Copyright 2020 Cambricon Corporation 18 Cambricon 5.5 Air inlet temperature requirements The required environment temperature of MLU290-M5 is 0-45 . The minimum air volume requirements of radiator under main temperature conditions is shown in the table below:

51Figure 1. Minimum air volume requirement VS Air inlet temperature table for MLU290-M5 Air inlet temperature Radiator Minimum Air Volume

() Requirements (CFM) 35 40 50 70 110 25 30 35 40 45 51Figure 1. Minimum air volume requirement vs Air inlet temperature It is recommended to use MLU290-M5 Intelligent Accelerating Card in green area. Copyright 2020 Cambricon Corporation 19 Cambricon 6. Cambricon NeuWare development environment NeuWare fully supports various mainstream programming frameworks (e.g. TensorFlow Caffe PyTorch and MXNet). Users can easily develop and deploy deep learning applications on cambricon MLU290-M5. At the same time, the NeuWare provides a complete runtime system and driver software to facilitate the rapid integration of the system. NeuWare also provides a range of tools including application development, function debugging, performance tuning, etc. Among them, application development tools include machine learning library, runtime library, compiler, model retraining tool and specific field (such as video analysis field) SDK; function debugging tools can meet different levels of debugging requirements such as programming framework and function library; performance tuning tools include performance profiling tools and system monitoring 1Figure 6.1 Cambricon NeuWare Copyright 2020 Cambricon Corporation 20 tools. Cambricon 7. Compliance MLU290-M5 Intelligent Accelerating Card is compliant with the regulations listed in this chapter. The compliance marks can be found on the labels of each devices. FCC statement 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. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. CE statement

- This product must not be used in residential areas.

- This product may cause interference if used in residential areas. Such use must be avoided unless the user takes special measures to reduce electromagnetic emissions to prevent interference to the reception of radio and television broadcasts. Copyright 2020 Cambricon Corporation 21

PR eecad PET ET} District, ISH China Ea CAMBRICON TECHNOLOGIES Co., Ltd. MODEL: MLU290-M5_ FCC ID: 2ARVF-MLU290 Ons 11/F Block D, Zhizhen Tower, No.7 Zhichun Road, __ LISTED

Cambricon Technologies Corporation Limited Authority to Act as Agent Date: 2020/09/29 American Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern:

_ Washington Technology International (Beijing) Ltd ___is authorized to act on our behalf, until otherwise notified, for applications to American Certification Body, Inc. (ACB). We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you, Agency Agreement Expiration Date: _____ 12 months_____ ______Wang Dan___________

(Print name)

(Signature1) ________ __________________ ___Certification Engineer_____________ By:

Title:

On behalf of: Cambricon Technologies Corporation Limited _ Telephone:

(Company Name) 010-83030003 1 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead. 022311 6

Cambricon Technologies Corporation Limited Authority to Act as Agent Date: 2020/09/29 American Certification Body, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern:

_ Washington Technology International (Beijing) Ltd ___is authorized to act on our behalf, until otherwise notified, for applications to American Certification Body, Inc. (ACB). We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002 (b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you, Agency Agreement Expiration Date: _____ 12 months_____ ______Wang Dan___________

(Print name)

(Signature1) ________ __________________ ___Certification Engineer_____________ By:

Title:

On behalf of: Cambricon Technologies Corporation Limited _ Telephone:

(Company Name) 010-83030003 1 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead. 022311 6 Cambricon Technologies Corporation Limited Request for Confidentiality Date: 2020/09/29 Subject: Confidentiality Request for: 2ARVF-MLU290 Pursuant to FCC 47 CRF 0.457(d) and 0.459 and IC RSP-100, Section 10, the applicant requests that a part of the subject FCC application be held confidential. Type of Confidentiality Requested Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Permanent Permanent*2 Permanent Permanent Permanent Permanent Permanent*

Exhibit Block Diagrams External Photos Internal Photos Operation Description/Theory of Operation Parts List & Placement/BOM Tune-Up Procedure Schematics Test Setup Photos Users Manual

*Note: ______(Insert Explanation as Necessary)______ ___ Cambricon Technologies Corporation Limited _____ has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to

"competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality:

The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality:

The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of ___(specify number of days not to exceed 180)3___ days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify ACB in the event information regarding the product or the product is made available to the public. ACB will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Sincerely, By:_____ ______ _ Wang Dan___

(Signature/Title4)

(Print name) 2 - The asterisked items (*) require further justification before permanent confidentiality will be allowed. These also currently require review by the FCC under their Permit-But-Ask policy before the grant is issued and can delay completion of an application. Further justification should be added to the note above. One such example for a potted device would be:

The EUT is FULLY potted using a non-removable epoxy based material. Removal of potting material causes irreparable damage to internal circuitry. See photographs exhibits that outline the device before and after potting. 3 - Please refer to http://acbcert.com/documents/misc-docs/Memo-Short-Term-Vs-Standard-Confidentiality.pdf for 4 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead. complete details. 022311 6