General Purpose Input/Output (Gpio); Adc; Pwm - SIM Tech SIMCom SIM2000S Hardware Design

4.11. General Purpose Input/Output (GPIO)

SIM2000S provides 2 GPIO pins. The output voltage level of the GPIO can be set by AT command "AT+ SGPIO".
The input voltage level of the GPIO can also be read by AT command "AT+ SGPIO". For more details, please
refer to document [1].
Table 28: Pin definition of the GPIO
Pin name
GPIO33
GPIO34

4.12. ADC

Table 29: Pin definition of the ADC
Pin name
ADC1
ADC2
SIM2000S provides two auxiliary ADC, which can be used to measure the voltage. User can use AT command
"AT+CADC" to read the voltage value. For details of this AT command, please refer to document [1].
Table 30: ADC specification
Parameter Min
Voltage range 0
ADC Resolution
Sampling rate
ADC precision

4.13. PWM

Table 31: Pin definition of the PWM
Pin name
PWM
SIM2000S provides a PWM interface which can be used to drive a vibrator, and a backlight LED for display or
keyboard. PWM output frequency varies from 0 to 4.8MHz. AT command "AT + SPWM" is used to set the
output period and duty cycle of the PWM. For details, please refer to document [1].
SIM2000S_Hardware_Design_V1.00
Pin number
67
68
Pin number
25
36
Typ
12
20
Pin number
35
Reset state
Output, pull down
Output, pull up
Description
Analog voltage input
Analog voltage input
Max
2.5
2.4
30
Description
Pulse Width Modulation
40
Smart Machine Smart Decision
Unit
V
bits
MHz
mV
2014-02-27