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4. TROUBLE SHOOTING
4.8 SIM Detect Trouble Shooting
SIM interface scheme is shown below. SIM_IO, SIM_CLK, SIM_RST ports are used to communicate
DBB with ABB and the Charge Pump in ABB enables 1.8V/3V SIM operation.
R628
24
SIM_CLK
SIM_RST
C615
C616
150p
150p
SIM_CLK : SIM Card reference clock
SIM_RST : SIM Card async/sync reset
LGE Internal Use Only
VRSIM
GND2 GND3
8
GND1
GND4
7
C3
C7
3
C2
C6
2
C1
C5
1
J600
C617
0.1u
<Fig.1> SIM Circuit Diagram
C618
R628
C615
- 88 -
R627
9
10
6
5
4
C618
22p
(R628)
SIM_CLK
(C615)
SIM_RST
SIM_IO
(C618)
SIM_PWRCTRL : SIM Card power activation
SIM_IO : SIM Card bi-directional data line
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10K
SIM_PWRCTRL
SIM_IO
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Table of Contents
Troubleshooting
