1. The A9 development board is a multi-function development board based on the Axin A9G GPRS/GSM module, which can be used to verify the basic communication functions and peripheral functions of the A9 module.
2. A9 development board has basic telephone/sms, GPRS network communication.
3. A9 development board contains lithium battery charge management, microphone, speaker interface, USB communication interface, multiple user buttons / led, TF card slot, acceleration sensor, SPI interface, I2C2 interface, ADC interface.
4. Pudding series development board camera expansion board, can be connected to 30W/200W camera.
5. A9 development board slot machine expansion board, can be connected to a traditional coin machine.
* Chip size: 19.2*18.8*2.7mm (±0.2mm)
* Working temperature -30 ° C +80 ° C;
* Working voltage is 3.5V-4.2V, 4V power supply is recommended;
* Boot voltage > 3.5V;
* Low power average current is below 2ma;
* Support GSM/GPRS four frequency bands, including 850, 900, 1800, 1900MHZ;
* GPRS Class 10;
* Sensitivity <-105;
* Support voice calls;
* Support SMS SMS;
* GPIO level is 2.8V;
* Support GPRS data service, maximum data rate, download 85.6Kbps, upload 42.8Kbps;
* Support standard GSM07.07, 07.05 AT commands and Ai-Thinker extension commands;
* A9 supports 3 serial ports, one download serial port and one AT command port;
* AT command supports standard AT and TCP/IP command ports;
* Support digital audio and analog audio, support HR, FR, EFR, AMR voice coding