Netlight Multiplexing Function; Operating Status Indication; Status Multiplexing Function; Rf Synchronization Signal - SIM Tech SIMCom SIM800C Hardware Design

4.10.1. NETLIGHT Multiplexing Function

Table 23: NETLIGHT multiplexing function
Pin name Pin number
NETLIGHT 41
Note: Multiplexing function need different software supply.

4.11. Operating Status Indication

The pin42 is for operating status indication of the module. The pin output is high when module is powered on,
and output is low when module is powered down.
Table 24: Pin definition of the STATUS
Pin name
STATUS
Note: For timing about STATUS, please reference to the chapter "4.2 power on/down scenarios"

4.11.1. STATUS Multiplexing Function

Table 25: STATUS multiplexing function
Pin name Pin number
STATUS 42
Note: Multiplexing function need different software supply.

4.12. RF Synchronization Signal

The synchronization signal is used to indicate incoming GSM burst.
Table 26: Definition of the RF_SYNC pin
Pin name
RF_SYNC
The timing of the synchronization signal is shown below.
SIM800C_Hardware_Design_V1.00
Mode 0(default)
NETLIGHT
Pin number Description
42 Operating status indication
Mode 0(default)
STATUS
Pin number Description
29 Transmit synchronization signal
220us
Transmit burst
RF_SYNC
Mode 1
GPIO
Mode 1
GPIO
577us
38
Smart Machine Smart Decision
2014-10-30