Sim Interface; Only For Training And Service Purposes - LG KP270 Service Manual

3. TECHNICAL BRIEF

3.5 SIM Interface

KP270 supports 1.8V & 2.9V plug in SIM. SIM_IO, SIM_CLK, SIM_RST ports are used to
communicate with S-Gold3H-LC and the SIM power supply enabled by PMIC.
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
SIM_IO : SIM card bidirectional reset
SIM CONNECTOR
SIM_DATA
LGE Internal Use Only
2V9_VSIM
2V9_VSIM
J301
R317
4
C5
10K
5
C6
6
C7
10
GND4
9
C323
GND3
22p
[Figure 3.5-1] SIM Circuit
- 36 -
2V9_VSIM
1
C1
2
C2
3
C3
7
GND1
8
GND2
C322 C324
0.1u 22p
Copyright © 2008 LG Electronics. Inc. All right reserved.
SIM_RST
SIM_CLK
C325
DNI

Only for training and service purposes