Network Status; Adc - SimCom SIM7020C Hardware Design

Table 14: Amphenol SIM socket pin description
Pin Signal
C1 SIM_VDD
C2 SIM_RST
C3 SIM_CLK
C5 GND
C6 VPP
C7 SIM_DATA
3.8

Network status

The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the
following figure.
Note: The value of the resistor named "R" depends on the LED characteristic.
Table 15: NETLIGHT pin status
NETLIGHT pin status
64ms ON, 800ms OFF
64ms ON, 3000ms OFF
64ms ON, 300ms OFF
OFF
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.
SIM7020_Hardware_Design_V1.02
Description
SIM Card Power supply.
SIM Card Reset.
SIM Card Clock.
Connect to GND.
SIM Card data I/O.
Module
4.7K
NETLIGHT
Figure 19: NETLIGHT reference circuit
Module status
No registered network
Registered network
Data transmit
Power off or PSM mode
26
Smart Machine Smart Decision
VBAT
R
47K
2018-07-25