EMC3380 Wi-Fi/BT Module Built-in ARM Cortex V8 dual-core processor, voice processor and Flash memory. Datasheet 2.4/5G Hz dual-frequency Wi-Fi, BLE 5.0, audio processing unit, PSRAM, rich peripherals Version:3.1 Date:2020-02-26 Number:DS0144EN Abstract mesh. ⚫ Input voltage:2.7V~3.3V ⚫ Processor:Dual-core CPU with ARM v8-M architecture. ▪ Performance core KM4:Cortex-M33 with main frequency up to 200MHz. ▪ Energy Efficiency Core KM0:Cortex-M23 with main frequency up to 20MHz.
✓ The baud rate is as high as 4M. ▪ Up to 7 channels 12-bit ADC, 1M sampling rate, battery power detection ▪ Low power RTC (32kHz) ▪ Up to 5 x 5 matrix keyboard and 4 touch keys can be supported ⚫ Operating Temperature:-20℃ to +85℃ ⚫ Antenna:On-Board PCB Antenna, or IPEX Connector ⚫ Interface and Dimension ▪ EMC3380-E/S:2 x 21pin 1.
Order Code EMC For example, 3 38 0 -S J L Product Series EMC=Wi-Fi + BT Module Product Type 3=3.3V Standard Universal Voltage Typical Target Applications and Functions 38= IoT Voice Application Processor Shape size, enhancement function 0=2 x 21pin 1.2 Spacing double-row stamp holes 0A=2 x 21pin 1.2 Spacing double-row stamp holes, additional audio processing DSP RF Interface P=2.4GHz,On-board PCB antenna E=2.4GHz,External antenna IPEX connector D=2.4/5GHz,On-board PCB antenna S=2.
EMC3380 Series Wireless Module Data Manual Version Update Record Date Version Update Items 2019-03-13 1.0 Initial Document. 2019-04-02 1.1 Update pin multiplexing. 2019-04-12 1.2 2019-06-02 2.0 Update Document format, content to conform to the actual product. 2019-08-10 2.1 Add Module Label Information and Radio Frequency Part Data. 2019-09-12 2.2 Adjust the overall document format. 2020-02-26 3.
EMC3380 Series Wireless Module Data Manual Catalog Abstract ...................................................................................................................................................... 1 Introduction............................................................................................................................................ 6 Peripheral List ..............................................................................................................................
EMC3380 Series Wireless Module Data Manual Wi-Fi ATE Command ................................................................................................................... 23 5.1.1. Start MP mode .................................................................................................................................. 23 5.1.2. Stop MP mode ................................................................................................................................... 23 5.1.3.
EMC3380 Series Wireless Module Data Manual 8.2.3. IEEE802.11n-HT20(2.4G) mode ......................................................................................................... 37 8.2.4. EMC3380 Bluetooth RF characteristic ............................................................................................... 41 Antenna Information ..............................................................................................................................43 Antenna Type ...............
EMC3380 Series Wireless Module Data Manual Sales and Technical Support Information .............................................................................................55 Table Catalog Table 1 EMC3380 peripheral list ......................................................................................................................... 7 Table 2 EMC3380 Pin Definition ......................................................................................................................
EMC3380 Series Wireless Module Data Manual Figure 5 JLink Connection schematic diagram ................................................................................................. 28 Figure 6 Serial download mode connection diagram ........................................................................................ 29 Figure 7 Use MXKIT-BASE to enter serial download mode ............................................................................ 30 Figure 8 Image Tool use interface ..............
EMC3380 Series Wireless Module Data Manual Introduction EMC3380 is a high-performance module mainly used in voice applications of the Internet of Things. It has a dual-core microcontroller with ultra-high integration, supports 2.4/5GHz dual-band Wi-Fi and BLE 5.0 wireless communication technology, and includes large capacity Flash, RAM, audio codec and audio digital coprocessor to meet various complex requirements in speech application.
EMC3380 Series Wireless Module Data Manual Peripheral List Table 1 EMC3380 peripheral list Item Peripherals Comment Note HS_UART0 UART HS_UART1 Interior connect with Bluetooth LP_UART1 Wake up in Low energy mode LP_UART0 Log UART,Wake up in Low energy mode HS_SPI0 SPI HS_SPI1 HS_USI_SPI RTC 50MHz Support Master mode, Clock frequency up to 25MHz Support Master/Slave mode, Clock frequency up to 25MHz RTC_OUT EXT_32K IR IR I2C LP_I2C PWM Support Master/Slave mode, Clock frequency up to S
EMC3380 Series Wireless Module Data Manual Characteristics System and Storage Processor ▪ Dual-core processor ▪ KM4: Use ARM latest v8M architecture, compatible with Cortex-M4F instruction set ▪ KM4: Use ARM latest v8M architecture, compatible with Cortex-M0 instruction set ▪ Two cores have equal access to SRAM, peripherals and registers ▪ Internal communication between the two processors KM4 processor ▪ Compatible with Cortex-M4F instruction set, support FPU, DSP, MPU and TrustZone-M technologi
EMC3380 Series Wireless Module Data Manual ▪ LP-GDMA0 supports 6 channels Flash ▪ SPI Flash controller with cache ▪ Support ICP technology, directly program Flash General-Purpose I / O (GPIO) ▪ 16 GPIOs with configurable pull-up and pull-down resistors ▪ Configurable external interrupt triggered by rising edge, falling edge and both edges Wireless Communication Wi-Fi ▪ 802.11 b / g / n 1x1, 2.4GHz & 5GHz ▪ Support 20MHz / 40MHz bandwidth, 802.
EMC3380 Series Wireless Module Data Manual ▪ Provide 2 SPI interfaces ▪ SPI0 (High speed): can be configured as master / slave mode, clock up to 50MHz. ▪ SPI1 (Normal speed): can be configured as master mode, clock up to 25MHz ▪ Support DMA transfer ▪ Configurable independent interrupt ▪ FIFO depth: The receive and transmit FIFO queues have a depth of 64 words, and each word has 16 bits.
EMC3380 Series Wireless Module Data Manual ▪ Support DMA for data transmission and reception ▪ Support bus arbitration mechanism to realize the communication capability of multi-master equipment ▪ Wake up from device address matching to achieve low power consumption ▪ Software configurable parameters: SDA hold time, slave device address, etc.
EMC3380 Series Wireless Module Data Manual Touch button ▪ Support 4 touch sensor channels ▪ Automatic hardware channel scanning, programmable scanning cycle, quantity and cycle ▪ Differential or absolute threshold judgment mode (ETC) ▪ Automatic environmental capacitance tracking and calibration (ETC) ▪ Hardware automatic baseline initialization ▪ Automatic baseline and threshold updates for noisy environments ▪ Programmable button debounce function ▪ Each interrupt source can enable interru
EMC3380 Series Wireless Module Data Manual Pin Definition Pin Distribution 3.1.1. EMC3380 EMC3380 has two sets of pins (1X21 + 1X21). Pin spacing is 1.2 mm. The arrangement of the pins of EMC3380 is shown in Figure 2, and the pins are defined in Table 3. Figure 2 EMC3380 Pin Arrangement Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
EMC3380 Series Wireless Module Data Manual Pin Definition 3.2.1.
EMC3380 Series Wireless Module Data Manual 31 PA27(1) (SWDIO) Internal UP LP_UART_RTS LP_UART_CTS 34 PA28 EfusePullCtrl3 33 PA30(1) External UP 37 PB1(1) EfusePullCtrl4 LP_UART_TXD 42 PB2 High-Z LP_UART_RXD 32 PB3 (SWCLK) HS_USI_SPI_CS HS_PWM6 LP_PWM0 RREF HS_USI_SPI_CLK HS_PWM7 LP_PWM1 VBUS_OTG DMIC_CLK SGPIO_ HS_TIM4_T OUT DMIC_DATA High-Z PCM_CLK SGPIO RIG HS_TIM5_T RIG PCM_SYNC 41 PB4 High-Z SPI1_MOSI RTC EXT_32K 40 PB5 High-Z SPI1_MISO RTC_OUT LP_I2C_SCL 3
EMC3380 Series Wireless Module Data Manual 17 AGND 10 CLOC_SEL(3) 11 BOOT_SEL(3) 12 CHAN_SEL(3) 13 ALPHA_SEL(3) 14 VREG(3) Copyright of Shanghai MXCHIP Information Technology Co.,16 Ltd.
EMC3380 Series Wireless Module Data Manual (1). Special function capture pins. When the module starts, it will detect the state of these pins to enter special functions, please refer to section 3.2.3 (2). The default state of the pin. When the Reset button is pressed, all GPIO ports will maintain the previous state. When the Reset button is released, the state of the GPIO returns to the state described in "Default State" in Table 2.
EMC3380 Series Wireless Module Data Manual PA16 KEY_ROW4 KEY_COL5 LGPIO0 GPIOC_LP4 PA17 KEY_ROW6 KEY_COL3 LGPIO1 GPIOC_LP5 PA18 KEY_ROW5 KEY_COL4 LGPIO2 GPIOC_LP6 KEY_COL2 LGPIO3 GPIOC_LP7 PA19 RTC_OUT 10 PA25 KEY_COL1 LGPIO2 GPIOC_LP10 9 PA26 KEY_COL0 LGPIO3 GPIOC_LP11 Special Function Capture Pin The module will detect the status of these pins during power-on to enter some special modes and functions. These functions are determined by the hardware and cannot be modified.
EMC3380 Series Wireless Module Data Manual Table 5 Firmware special function capture pin Firmware operation mode PB1(BOOT) PB23(STATUS) Normal 1 Not test ATE 0 1 QC 0 0 Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
EMC3380 Series Wireless Module Data Manual System memory Space The EMC338x module contains the following memory cells: KM4 Embedded SRAM The KM4 core contains up to 512K bytes of continuous on-chip SRAM memory. The embedded SRAM is available in bytes (8 bits), half words (16 bits) or single words (32 bits). It is divided into two blocks, both of which can be accessed by the KM4 and KM0 cores.
EMC3380 Series Wireless Module Data Manual SPI Flash Memory The CPU manages access to flash memory from the I-Code and D-Code buses via the built-in SPI Flash Control Unit (SPIC). At the same time, operations such as erasure, programming, and read-write protection are also implemented, and the execution of code stored in flash memory is accelerated by instruction prefetch and cache. PSRAM 4M bytes PSRAM, using 50MHz DDR memory.
EMC3380 Series Wireless Module Data Manual KM4 Peripherals 0x4000_0000 0x47FF_FFFF 128MB: KM4 128MB Peripherals Address KM0 Peripherals 0x4800_0000 0x4FFF_FFFF 128MB: KM0 128MB Peripherals Address 0x5000_0000 0x5800_0000 0x57FF_FFFF 128MB 0xFFFF_FFFF 2816MB KM4 Peripherals 128MB: KM4 Peripherals Secure Secure Address RSVD Reserved Partition the flash storage space to store firmware and data for different functions.
EMC3380 Series Wireless Module Data Manual ATE(RF Test Mode) According to the Table 5 firmware special function capture pin, after the module is started into the ATE mode, it can interact with the module through the debug serial port (UART_LOG) to make the module enter a specific transmit and receive mode, thereby carry out testing the RF and electrical performance.
EMC3380 Series Wireless Module Data Manual channel: frequency band of sending and receiving packets 5.1.5. Set operational bandwidth Set the bandwidth for sending and receiving data packets. Set the guard interval for transmitting MCS messages. If no parameters are provided, the default setting is 20MHz bandwidth, and long guard interval (long GI) is used for transmission.
EMC3380 Series Wireless Module Data Manual 5.1.10. Start continuous Tx mode This command is used for continuous packet testing. Use the time command to set the sending time. Use the count command to set the number of sending packets. If neither time nor count is set, the continuous packet sending mode is started. If the background mode is not set, any character input can stop sending packets. If the cs mode is set, transmitting through the carrier suppression signal.
EMC3380 Series Wireless Module Data Manual iwpriv mp_txpower patha=44,pathb=44 iwpriv mp_rate 108 //set path A and path B Tx power level //set OFDM data rate to 54Mbps,e x: CCK 1M = 2, CCK 5.5M = 11, KK, OFDM54M = 108 N Mode: MCS0 = 128, MCS1 = 129…..etc. iwpriv mp_ctx background //start continuous Tx iwpriv mp_ctx stop //stop continuous Tx iwpriv mp_stop //exit MP mode continuous message sending test iwpriv mp_start //enter MP mode iwpriv mp_channel 1 //set channel to 1 . 2, 3, 4~11 etc.
EMC3380 Series Wireless Module Data Manual iwpriv mp_txpower patha=44,pathb=44 iwpriv mp_rate 108 //set path A and path B Tx power level //set OFDM data rate to 54Mbps,ex: CCK 1M = 2, CCK 5.5M = 11, KK, OFDM54M = 108 N Mode: MCS0 = 128, MCS1 = 129…..etc.
EMC3380 Series Wireless Module Data Manual Flash Programming There are several ways to program the module's Flash to burn specific function firmware.
EMC3380 Series Wireless Module Data Manual mxos make helloworld@emc3380 download Command results: Making config file for first time processing components: helloworld emc3380 MXOS …… Downloading applcation, size: 443512 bytes... ############################################################################################################ ######################################################################################################## 100% 433 KiB 8.0 KiB/s 18 s Build complete Making .gdbinit Making .
EMC3380 Series Wireless Module Data Manual Figure 7 Use MXKIT-BASE to enter serial download mode 2. Open the burning software image tool (v2.2.12), Chip Select selects AmebaD (8721D). 3. In the Flash Download section, select the binary file to be downloaded and download it to the corresponding address. ⚫ If compilation tool is provided by MXCHIP, xxxx@emc338x.all.bin is usually generated, and the corresponding download address is 0x08000000.
EMC3380 Series Wireless Module Data Manual Burning system via BAT BAT is a batch-oriented production tool launched by MXCHIP. It can not only implement firmware programming, but also unique IDs for each module, such as cloud service verification codes, security keys, certificates, tokens, etc. The BAT system uses a server-client architecture. Import firmware and IDs in batches on the server, create production tasks, and uniformly manage the production system.
EMC3380 Series Wireless Module Data Manual Electrical Parameters Working Condition When the input voltage is lower than the lowest rated voltage, the operation will be unstable. This should be noted in power supply design. Table 9 Input Voltage Range Symbol Description VDD Power Voltage Detail Condition Minimum Typical Maximum Unit 2.7 3.3 3.6 V Absolute Maximum Parameter Modules operating outside the absolute maximum ratings may cause permanent damage.
EMC3380 Series Wireless Module Data Manual Operation Mode Aver Conditions Power Scenario Mode Un age it Current 1KB retention RAM RTC timer Deepsleep with Key-Scan 1KB retention RAM 12~13 𝝻A 20 𝝻A 30~50 𝝻A 81 mA 60 mA 67 mA 45 mA 39 mA 1.
EMC3380 Series Wireless Module Data Manual Table 13 RF consumption under 3.3V Operation Mode Current 2.4G Unit 5G 1T-MCS7/BW40M (15dBm) 206 286 1T-MCS7/BW40M (18dBm@2.4G, 17dBm@5G) 247 310 1T-MCS7/BW20M (15dBm) 204 286 1T-MCS7/BW20M (18dBm) 248 308 1T-Legacy_OFDM54M (16dBm) 214 296 1T-Legacy_OFDM54M (19dBm@2.
EMC3380 Series Wireless Module Data Manual RF Parameter Basic RF Parameters Table 15 RF Standard Item Description Operating Frequency Range 2.4G Frequency Band:2400~24835GHz ; (Dual Frequency) 5G Frequency Band:5150~5850MHz Wireless standard WIFI: IEEE802.11b/g/n(2.4G), 802.11a/n(5G) Bluetooth: BLE5.0 Wi-Fi: 11b: DBPSK, DQPSK,CCK for DSSS Modulation Mode 11g/a/n: BPSK, QPSK, 16QAM, 64QAM for OFDM Bluetooth: GFSK 11b:1,2,5.
EMC3380 Series Wireless Module Data Manual 11b Target Power@11Mbps 15.0 16.5 18.0 dBm fc +/-11MHz to +/-22MHz - - -30 dBr fc > +/-22MHz - - -50 dBr -10 -2 +10 ppm Spectrum Mask @ target power Frequency Error Constellation Error (peak EVM) @target power 1~11Mbps - - Min. Typical. Max. Unit 1Mbps (FER≦8%) - -98 -97.5 dBm 11Mbps (FER≦8%) - -90 -90 dBm RX Characteristics 35%(or -11dB) Minimum Input Level Sensitivity 8.2.2. IEEE802.11g mode Table 17 EMC3380 IEEE802.
EMC3380 Series Wireless Module Data Manual RX Characteristics Min. Typical. Max. Unit 6Mbps (FER≦10%) - -93 -93 dBm 54Mbps (FER≦10%) - -76 -75.5 dBm Minimum Input Level Sensitivity 8.2.3. IEEE802.11n-HT20(2.4G) mode Table 18 EMC3380 IEEE802.11n-HT20 RX/TX Characteristics Parameters Item Description Mode IEEE802.11n HT20 Channel CH1 to CH13 Data Rates MCS0/1/2/3/4/5/6/7, up to 65Mbps TX Characteristics Min. Typical. Max. Unit Transmitter Output Power 11n Target Power@MCS0 13.
EMC3380 Series Wireless Module Data Manual Channel CH1 to CH13 Data Rates MCS0/1/2/3/4/5/6/7, up to 135Mbps TX Characteristics Min. Typical. Max. Unit Transmitter Output Power 11n Target Power@MCS0 13.5 14.5 16 dBm 11n Target Power@ MCS7 12.5 14 15.
EMC3380 Series Wireless Module Data Manual fc > +/-30MHz Frequency Error -10 -40 dBr -2 +10 ppm Constellation Error (peak EVM) @target power MCS0 - -29 -5 dBm MCS7 - -29 -25 dBm Min. Typical. Max. Unit 6Mbps (FER≦10%) - -89 -88.5 dBm 54Mbps (FER≦10%) - -74.5 -74 dBm RX Characteristics Minimum Input Level Sensitivity 8.2.3.3 IEEE802.11n HT20(5G) mode Table 21 EMC3380 IEEE802.11n-HT20(5G RX/TX Characteristics Parameters Item Description Mode IEEE802.
EMC3380 Series Wireless Module Data Manual 8.2.3.4 IEEE802.11n HT40(5G) mode Table 22 EMC3380 IEEE802.11n-HT40(5G) RX/TX Characteristics Parameters Item Description Mode IEEE802.11n(5G) HT40 Channel CH36 to CH165 Data Rates MCS0/1/2/3/4/5/6/7, Max.135Mbps TX Characteristics Min. Typical. Max. Unit Transmitter Output Power 11n Target Power@MCS0 11n Target Power@MCS7 11.5 13 14.5 dBm 10.5 12 13.5 dBm - - -20 dBr - - -28 dBr -45 dBr +10 ppm -5 dBm -27 dBm Max.
EMC3380 Series Wireless Module Data Manual 8.2.4. EMC3380 Bluetooth RF characteristic Table 23 EMC3380 BLE4.0 TX/RX RX/TX Characteristics Parameters Item DataRate Min Typical Max POWER_AVERAGE LE_1M 6 10 10dBm Frequency Drift Error LE_1M -50KHz -5 50KHz -150KHz 6.1 150KHz Remark Carrier frequency offset and drift at NOC: ∆Fn max LE_1M |F0-Fn| LE_1M 2.37 50KHz |F1-F0| LE_1M 2.1 20KHz |Fn-Fn5| LE_1M 0.
EMC3380 Series Wireless Module Data Manual Table 24 EMC3380 BLE5.0 TX/RX RX/TX Characteristics Parameters Item Datarate Min Typical Max POWER_AVERAGE LE_2M 4 8 10dBm Frequency Drift Error LE_2M -50KHz -4.3 50KHz 6.1 150KHz Remark Carrier frequency offset and drift at NOC: ∆Fn max LE_2M -150KHz |F0-Fn| LE_2M 2.37 50KHz |F1-F0| LE_2M 2.1 23KHz |Fn-Fn5| LE_2M 0.89 20KHz Modulation characteristics: ∆F1avg LE_2M 450KHz 502.1 550KHz ∆F2avg LE_2M 450KHz 499.
EMC3380 Series Wireless Module Data Manual Antenna Information Antenna Type EMC3380 has two specifications: PCB antenna and IPX connector. Please refer to order code. PCB Antenna Clearance When using PCB antenna in WIFI module, it is necessary to ensure that PCB and other metal devices are at least 16 mm away from the motherboard. The shaded areas in the figure below need to be far away from metal devices, sensors, interference sources and other materials that may cause signal interference.
EMC3380 Series Wireless Module Data Manual External Antenna Connector Figure 11 Dimension Diagram of External Antenna Connector Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
EMC3380 Series Wireless Module Data Manual Dimensions and Production Guidance Assembly Dimension Diagram Figure 12 EMC3380-S, EMC3380-D dimension(unit: mm) Packing dimension diagram Figure 13 EMC3380-S, EMC3380-D packing dimension(unit: mm) Note: All dimensional tolerances marked in the figure are ± 0.25mm. Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
EMC3380 Series Wireless Module Data Manual Production Guidelines MXCHIP stamp port packaging module must be SMT machine patches, module humidity sensitivity grade MSL3, after unpacking more than a fixed time patches to bake module.
EMC3380 Series Wireless Module Data Manual If the disassembly time exceeds 3 months, SMT process is forbidden to weld this batch of modules, because PCB gold deposition process, over 3 months, pad oxidation is serious, SMT patch is likely to lead to virtual welding, leak welding, resulting in various problems, our company does not assume the corresponding responsibility; Before SMT patch, ESD (Electrostatic Discharge, Electrostatic Release) protection should be applied to the module.
EMC3380 Series Wireless Module Data Manual Storage Condition Figure 15 Storage Conditions Diagram Secondary Reflux Temperature Curve We recommend solder paste model: SAC305, lead-free. No more than 2 reflux times. Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
EMC3380 Series Wireless Module Data Manual Figure 16 Reference Secondary Reflux Temperature Curve Copyright of Shanghai MXCHIP Information Technology Co., Ltd.
EMC3380 Series Wireless Module Data Manual FCC and IC Information FCC Warning ✓ Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. ✓ Note: 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.
EMC3380 Series Wireless Module Data Manual ✓ - French: ✓ Le présentappareilestconforme aux CNR d'Industrie Canada applicable aux appareils radio exempts de license. L'exploitationestautorisée aux deux conditions suivantes: ✓ (1) l'appareil ne doit pas produire de brouillage, et ✓ (2) l'utilisateur de l'appareildoit accepter tout brouillageradioélectriquesubi, mêmesi le brouillageest susceptible d'encompromettre le fonctionnement.
EMC3380 Series Wireless Module Data Manual Explanation: This module complies with FCC RF radiation exposure limits set forth for an uncontrolled environment, This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body." This module is designed to comply with the FCC statement, FCC ID is: P53-EMC3380. Antennas A list of antennas included in the application for certification must be provided in the instructions.
EMC3380 Series Wireless Module Data Manual Explanation: Topband can increase the utility of our modular transmitters by providing instructions that simulates or characterizes a connection by enabling a transmitter. Additional testing, Part 15 Subpart B disclaimer The grantee should include a statement that the modular transmitter is only FCC authorized for the specific rule parts (i.e.
EMC3380 Series Wireless Module Data Manual Packaging and Label Information packaging information Table 25 Module MOQ and Packaging Information Order Code EMC3380-S EMC3380-D MOQ(pcs) Shipment packing (pallet/tape) 1200 Tray Label Information Figure 17 Module Label Schematic Diagram 1. MXCHIP: Company Logo. 2. CMIIT ID: SRRC Model Authorization ID, 10 bits, not yet available, replaced by X. 3. EMC3380-S: Product Main Type. 4. JL5: Product Auxiliary Model. 5.
EMC3380 Series Wireless Module Data Manual Sales and Technical Support Information If you need to consult or purchase this product, please call Shanghai MXCHIP Information Technology Co., Ltd. during office hours. Office hours: Monday to Friday morning: 9:00-12:00, afternoon: 13:00-18:00 Contact Tel: +86-21-52655026 Address: 9th Floor, Lane 5, 2145 Jinshajiang Road, Putuo District, Shanghai Zip code: 200333 Email: sales@mxchip.com Copyright of Shanghai MXCHIP Information Technology Co., Ltd.