Specifications

SIM7912&SIM7906 Hardware Design V1.02
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Pin name
Pin no.
I/O
Functional description
Comment
NET_STATU
S
170
DO
Indicate the module’s network activity
status.
1.8V power domain.
If unused, keep it open
NET_MODE
147
DO
Indicate the module’s network
registration mode.
1.8V power domain.
If unused, keep it open
The timing parameters are shown in the following table.
Table 31: NET_STATUS pin status
Pin Name
Status
Description
NET_MODE
Always High
Registered on network
Always Low
Others
NET_STATUS
Flicker slowly (200ms High/1800ms Low)
Network searching
Flicker slowly (1800ms High/200ms Low)
Idle
Flicker quickly (125ms High/125ms Low)
Data transfer ongoing
Always High
Voice calling
A reference circuit is shown in the following figure.
Module
1K
VBAT
Network
Indicator
4.7K
Figure 27: Network Indicator reference circuit
3.16 Status Indication
The STATUS pin is set as the module status indicator. It outputs high level voltage when the module is
turned on.