User Guide

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GM500-U1G_A
Hardware Development Guide
Support RTS and CTS hardware flow control
Baud rate can reach up to 921600 bps,115200 bps by default
Used for AT command, data transmission or firmware upgrade
Debug UART interface:
Two lines on debug UART interface, can be used for software debug, firmware upgrade
USB Interface
Compliant with USB 2.0 specification (slave only)
Used for AT command communication, data transmission, software debug and firmware upgrade.
SDIO interface
1.8V, support (full speed) 4bits,SDIO compatible to WLAN (802.11)
Antenna Interface
Include main antenna ,diversity antenna and GNSS antenna
Rx-diversity
Support WCDMA/LTE Rx-diversity
Network Indication
Use LED_MODE to indicate network connectivity status
Temperature Range
Normal operation: -30°C to +75°C
Restricted operation: -40°C~ -30°C and +75°C~ +85°C
1)
Storage temperature: -40°C to +85°C
Firmware Upgrade
USB interface or UART interface or OTA(WEFOTA)
1.3. Function Diagram
The figure below shows a block diagram of the GM500-U1G_A and illustrates the major functional parts.
 Power management
 Baseband
 Memory
 RF send-receive
 Peripheral interface
--UART interface
--USIM card interface
--USB interface
--SDIO interface
--SPI interface
--I2C interface
--ADC interface
--Status interface (LED)