About GSM modem

[ALLEN_CHANG at fic.com.tw]

Hi Andy:

 

I remove the S3C2442 in GTA02A5, and GSM_MODEM’s TX and RX connect to Debug board’s RX and TX. 

When the GSM_MODEM enters the deep sleep mode and the current only is 4-5mA.

After GSM_MODEM enters sleep mode, I remove these UART net of GSM_MODEM from Debug board.

I measuring these GSM_Modem’s pin connect to S3C2442.

 

TX_MODEM : 2.9V

RX_MODEM: 0 V

CTS= 0v

RTS= 0v

INT0: Floating

INT0=2.9V

 

I think maybe some wrong settings make our GSM_MODEM can’t enter sleep mode.

Do you have any idea?

  Best Wishes~

______________________________________________

Allen Chang ( 張 吉 隆 )

First International Computer Inc.
7F, No.300, Yang Guang St., NeiHu, Taipei, 114, Taiwan
Tel: +886-2-8751-8751 Ext: 6171

Fax: +886-2-8751-8739

Email:allen_chang at fic.com.tw

 

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