Sim Interface - LG KE600 - Cell Phone Service Manual

3. TECHNICAL BRIEF
RPWRON_EN
C244
100p
END_KEY
Figure9 Remote power on and End-key power on circuit

3.5. SIM interface

KE600/KE608 supports 1.8V & 3V plug in SIM, SIM interface scheme is shown in (Figure 10).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-Gold2) and the SIM power
supply enabled by BBP (_SIM_EN).
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
SIM_IO : SIM card bidirectional reset
VBAT
U206 R1114D281D-TR-F
R252
1 3
VDD VOUT
1K
4 2
NC GND1
6 5
CE GND2
C245
1000p
VBAT
END
END
2V85_SIM
S
SI1305-E3
G
Q301
D
4
5
6
SIM_IO
10
9
C340
22p
Figure 10 SIM CARD Interface
- 40 -
R213 0
6 NO
4 NC
RPWRON END_KEY
C240
1uF
RPWRON
R401
END_KEY
2
10K
R402
1M
SIM_ENn
C339
0.1u
J301
1
GND1 VCC
2
VPP RST SIM_RST
3
SIM_CLK
IO CLK
7
GND5 GND2
8
GND4 GND3
C341
22p
VBAT
U203
NLAST4599DFT2G
COM 5 R215 0
PWRON
KP_OUT1
1
2SC5585
Q401
3
KP_IN5