2.SYSTEM CONNECTOR INTERFACE

2.8.5UART3 - TD3, RD3 (designated for future use)

UART3 is a full duplex serial communication port with transmission and reception lines. It has the same timing and electrical signal characteristics as UART1, TD and RD.

Transmitted Data 3 (TD3)

TD3 is used by your application to send data to the module via UART3.

Received Data 3 (RD3)

RD is used to send data to your application via UART3.

2.9 SIM Card Related Signals

Pin

Signal

Dir

Description

 

 

 

 

15

SIMVCC

-

SIM card power supply

 

 

 

 

16

SIMPRESENCE

I

SIM card presence

 

 

 

 

17

SIMRST

O

SIM card reset

 

 

 

 

19

SIMCLK

O

SIM card clock

 

 

 

 

18

SIMDATA

I/O

SIM card data

 

 

 

 

These connections allow you to communicate with the SIM card holder in you application.

Note! The distance between the SIM card holder and the module can be up to 25cm.

This SIM interface allows the use of 3V and 5V SIM cards. By default it works on 3V levels but will automatically switch to 5V, if a 5V SIM card is fitted.

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LZT 123 7263 R1C

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Sony Ericsson GM47, GM48 SIM Card Related Signals, RD is used to send data to your application via UART3, Simvcc, Simdata