Sim Card Interface - LG -A100 Service Manual

3.7 SIM Card Interface

SIM_DATA_1
The Main Base Band Processor(XMM1100) provides SIM Interface Module.
The XMM1100 checks status Periodically During established call mode whether SIM card is inserted or not,
but it doesn't check during deep sleep mode. In order to communicate with SIM card, 3 signals SIM_DATA,
SIM_CLK, SIM_RST.
And This model supports 1.8/3V SIM Card.
Signal
SIM_RST
SIM_CLK
SIM_DATA
LGE Internal Use Only
VSIM_PWR
VSIM_PWR
R232
4.7Kohms
J201
C5
GND1
C6
VPP
C7
IO
C227
C12
GND5
22pF
C11
GND4
Figure 3.7.1. SIM CARD Interface
This signal makes SIM card to HW default status.
This signal is transferred to SIM card.
This signal is interface datum.
VSIM_PWR
C1
VCC
C2
RST
C3
CLK
C228
C9
GND2
0.1uF
C10
GND3
Description
- 38 - Copyright © 011 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
SIM_RST_1
SIM_CLK_1
C229
C230
3p
27p
Only for training and service purposes