SimCom SIM7020E - Network Status; Adc

Smart Machine Smart Decision
SIM7020_Hardware_Design_V1.02 26 2018-07-25
Table 14: Amphenol SIM socket pin description
Pin
Signal
Description
C1
SIM_VDD
SIM Card Power supply.
C2
SIM_RST
SIM Card Reset.
C3
SIM_CLK
SIM Card Clock.
C5
GND
Connect to GND.
C6
VPP
C7
SIM _ D ATA
SIM Card data I/O.
3.8 Network status
The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the
following figure.
Module
NETLIGHT
VBAT
4.7K
47K
R
Figure 19: NETLIGHT reference circuit
Note: The value of the resistor named “R” depends on the LED characteristic.
Table 15: NETLIGHT pin status
NETLIGHT pin status
Module status
64ms ON, 800ms OFF
No registered network
64ms ON, 3000ms OFF
Registered network
64ms ON, 300ms OFF
Data transmit
OFF
Power off or PSM mode
Note: NETLIGHT output low level as “OFF”, and high level as “ON”.
3.9 ADC
SIM7020 has a dedicated ADC pin. It is available for digitizing analog signals such as battery
voltage and so on. The electronic specifications are shown in the following table.