SimCom SIM5218E Hardware Design page 43

SIM5218E Hardware Design
Table 22: GPIO Pins of SIM5218E
Pin Name Direction
65 GPIO0 Input,
interrupt
10 GPIO1 Output
30 GPIO2 Input
31 GPIO3 Output
32 GPIO4 Input
33 GPIO5 Output
GPIO0 is used for interrupt pin, default triggering mechanism is level trigger, and low level
will trigger interrupt. After interrupt, SIM5218E would send out Alarm information to host
CPU. Please Refer to "AT Command Manual".
GPIO1 be used to control Status LED,
Notes: 300R Resistor's value depends on LED.
And status indicating table is as follow.
Table 23：meanings of status LED
Status
Always On
200ms ON, 200ms OFF
800ms ON, 800ms OFF
Off
SIM5218E_HD_V1.03
Function
Input Port with interrupt,
Use AT Command to set interrupt triggering mechanism & polarity .
used as status LED driver
General Purpose Input Port without interrupt.
General Purpose Output Port (default value: Low Level)
RF Control Interrupt：Flight Mode Switch
General Purpose Output Port (default value: Low Level)
Figure 23: status LED circuit
Data
Searching Network
Data Transmit
Registered network
Power Off
42
Voice
Searching Network/Call Connect
Registered Network
11.06.2009