Network Status Indication Led Lamp; Srd Interface - SimCom SIM802 HD Manual

SIM802 Hardware Design

3.16 Network status indication LED lamp

The NETLIGHT Pin can be used to drive a network status indication LED lamp. The working
state of this Pin is listed in table 24:
Table 24: Working state of network status indication LED Pin
State SIM802 function
Off SIM802 is not running
64ms On/ 800ms SIM802 does not find the network
64ms On/3000ms SIM802 find the network
64ms On/ 300ms GPRS communication
The reference circuitry for you, shown as following figure:
Figure 32: Reference circuit for Network status LED

3.17 SRD interface

Table 25: Pin definition of the SRD interface
Name I/O
SCLK I/O
MISO I/O
SIM802_HD_V2.01
Typical Alternate
GPIO Clock of SPI
GPIO Master in slave out of
Description
General purpose input
and output
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12.01.2010