Reset Function; Adc - SimCom SIM5320AL User Manual

Note: The sinking current can be adjusted to meet design requirement through the AT command "AT+ CLEDITST =<0>,
<value>".The "value" ranges from 0 to 15,on behalf of the current changes from 0mA to 150mA in steps of 10mA.

3.12.2 Reset Function

SIM5320AL also have a RESET pin (PIN4) to reset the module. This function is used as an emergency
reset only when AT command "AT+CPOF" and the POWER_ON pin has no effect. User can pull the
RESET pin to ground, then the module will reset.
This pin is already pulled up in module, so the external pull-up resistor is not necessary. A 100nF capacitor
close to the RESET pin is strongly recommended. A reference circuit is recommended in the following
figure.
Note ： 50ms<t<200ms. ESD components are suggested to be used on Reset pin.

3.12.3 ADC

SIM5320AL has a dedicated ADC that is available for digitizing analog signals such as battery voltage and
so on; it is on PIN 47 and PIN 46 , namely ADC1 and ADC2 . This ADC is 12 bit
successive-approximation circuit, and electronic specification is shown in the following table.
Table 32: Electronic Characteristics
Specification
Resolution
Differential nonlinearity
Integral nonlinearity
Gain Error
Offset Error
Input Range
Input serial resistance
Input capacitance
Power-down to wakeup
SIM5320AL_User Manual_V1.01
Figure 37: Reset circuit
Min Typ Max
12
-4 +4
-8 +8
-2.5 +2.5
-4 +40
GND 2.2V
2
53
9.6 19.2
Smart Machine Smart Decision
Unit Comments/Conditions
Bits
LSB
LSB
Analog Vdd = ADC reference
2.4MHz sample rate
%
LSB
V
kΩ Sample and hold switch resistance
pF
μs
49 2014-08-20