General Purpose Input & Output (Gpio); Adc - SimCom SIM802 HD Manual

SIM802 Hardware Design
Table 20: PIN definition of the LCD interface
Name
DISP_CS
DISP_CLK
DISP_DATA
DISP_D/C
DISP_RST
Note: This function is not supported in the default firmware. For more information, please
contact SIMCom.
3.13 General purpose input & output (GPIO)
SIM802 provides a limited number of General Purpose Input/Output signal Pin.
Table 21: GPIO of SIM802
Name Pin
GPIO 52
SIM802 supports two general purpose output signal Pins. These Pins can be configured through
AT command "AT+CGPIO" in users' application to high voltage level or low voltage level. For
detail of this AT command, please refer to document [1] .

3.14 ADC

SIM802 provide one auxiliary ADC (General purpose analog to digital converter.) as voltage
input Pin, which can be used to detect the values of some external items such as voltage,
temperature etc. User can use AT command "AT+RADC" to read the voltage value added on
ADC Pin. For detail of this AT command, please refer to document [1].
Table 22: ADC specification
Voltage range
ADC Resolution
1
ADC accuracy
Sampling rate
SIM802_HD_V2.01
Pin Function
58 Display enable
13 Display clock
14 Display data output
16 Display data or command select
59 LCD reset
I/O Description
I/O General purpose Input/Output
Min Type
0
16
0.59
3
55
Max Units
2.4 V
bits
mV
KHz
12.01.2010