LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. HW Circuit Description
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3.6 SIM Card Interface
The Locosto provides SIM Interface Module. The Locosto 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.
Figure 3-6. SIM CARD Interface
D102
DNI_DIODE_1006
0.1u
C146
22p
C145
22p
C147
DNI_DIODE_1006
D103
V_SIM
10K
R130
VCC
1
5
VPP
J100
3
CLK
4
GND1
GND2
7
8
GND3
GND4
9
GND5
10
6
IO
RST
2
V_SIM
DNI_DIODE_1006
D101
SIM_IO
SIM_CLK
SIM_RST
SIM_PW_CTL
Signals
Description
SIM_RST
This signal makes SIM card to HW default status.
SIM_CLK
This signal is transferred to SIM card.
SIM_DATA
This signal is interface datum.