LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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.
SIM_CLK: SIM Card reference clock
SIM_PWRCTRL: SIM Card power activation
SIM_RST: SIM Card async/sync reset
SIM_RnW: SIM Card data line direction
SIM_IO: SIM Card bi-directional data line
SIM_CD: SIM Card presence detection
4. Trouble Shooting
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SIM CARD
120p
C704
0.1u
C705
VRSIM
150p
C706
1K
R711
CLK
3
GND1
5
9
GND2
10
GND3 GND4
12
11
GND5
IO
7
2
RST
4
RSV1
8
RSV2
1
VCC
VPP
6
J700 HSSC-8P-18
C703
150p
VRSIM
SIM_RST
SIM_CLK
SIM_IO
SIM_PWRCTRL
SIM_CLK
SIM_RST
SIM_IO
(C706)
(C703)
(R711)
SIM_IO
SIM_CLK
<Fig.1> SIM Circuit Diagram
Summary of Contents for KM710
Page 1: ...Date May 2008 Issue 1 0 Service Manual Model KM710c Service Manual KM710c Internal Use Only ...
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