LG KE820 - SIM Interface

3. TECHNICAL BRIEF
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3.5. SIM interface
KE820/KG99 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
Figure9 Remote power on and End-key power on circuit
Figure 10 SIM CARD Interface
Q301
D
G
S
SI1305-E3
4.7K
R320
1u
C309
27p
C308
J301
CLK
3
4
GND
I_O
6
2
RST
VCC
1
VPP
5
27p
C310
2V85_SIM
SIM_IO SIM_CLK
SIM_RST
_SIM_EN
100K
R322
2SC5585
Q302
2
3
1
10K
R321
KP_IN(5)
KP_OUT(1)
END_KEY
VBAT
END
END_KEY
100p
VSUPPLY
C461
100K
R453
1000p
C460
1K
R454
CE
6
2
GND1
5
GND2
4
NC
VDD
13
VOUT
R1114D281D-TR-FU403
RPWRON
RPWRON_EN
C438
1000p
U204 NLAST4599DFT2G
5COM
GND
3 1
IN
NC4
6NO
2
VCC
R219
100K
0R215
C233
1u
VBAT
RPWRON
PWRON
END_KEY