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
Typical
Alternate
Description
SCLK
I/O
GPIO
Clock of SPI
MISO
I/O
GPIO
Master in slave out of
General purpose input
and output
SIM802_HD_V2.01
12.01.2010
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