LG C1100 Service Manual page 22

D. SIM Interface
The AD6525 check status periodically in call mode if SIM card is inserted or not, but the
AD6525 don't check in deep sleep mode.
Interface by SIM_DATA, SIMCLK, SIM_RST(GPIO_23)
Table 3-5. SIM CONTROL SIGNALS DISCRIPTION
SIM_DATA
SIMCLK
SIM_RST(GPIO_23)
SIM_DATA
E. Key Interface
Include 5 column and 5 row. The AD6525 detect key press by interrupt.
F. ADP3537B Interrupt
There are two interrupts, EOC and CHRDET
EOC: End of Charge. AD6525 makes charging operation stop when high signal is inputted.
CHRDET: This pin is activated when the charger is inserted.
This pin receives and sends data to SIM card. This model support
only 3.0 volt interface SIM card.
Clock 3.25MHz frequency.
Reset SIM block
VSIM
J101
4
GND1
5
VPP
6
IO
10
GND5
9
VA165
GND4
GCA261-6S
Figure 3-9. SIM CIRCUIT
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3. TECHNICAL BRIEF
Description
AD6525
VSIM
C117
0.1u
C115
1
220n
VCC
2
RST
3
CLK
7
GND2
8
GND3
C116
1000p