3. TECHNICAL BRIEF
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D. SIM interface
The AD6527 provides SIM Interface Module. The AD6527 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(GPIO_23) are required. The descriptions about the signals are given by bellow Table 3-6
in detail.
E. Key interface
Include 5 columns, 5 rows and additional GPIO 35 for KEY_ROW5. The AD6527 detects whether
key is pressed or not by using interrupt method.
F. AD6537B Interrupt
AD6537B provides an active-high interrupt output signal. Interrupt signals are generated by the
Auxiliary ADC, audio, and charger modules.
Signals
Description
SIM_DATA
This pin receives and sends data to SIM card. This model can support 3.0
volt interface SIM card.
SIM_CLK
Clock 3.25MHz frequency.
SIM_RST
Reset SIM block
(GPIO_23)
Table 3-6. SIM CONTROL SIGNALS DISCRIPTION
SIM CONNECTOR
2V85_VSIM
C325
220n
C327
1000p
C326
22p
R348
0
VPP
J300
CLK
3
GND
4
6
I_O
RST
2
1
VCC
5
NA
C324
R346
20K
R349
0
2V85_VSIM
SIM_RST
SIM_DATA
SIM_CLK
Figure 3-9. SIM Interface of AD6527
Summary of Contents for C2100
Page 1: ...Service Manual Model C2100 Service Manual C2100 P N MMBD0048201 Date April 2005 Issue 1 0 ...
Page 76: ...4 TROUBLE SHOOTING 77 4 10 KEY backlight Trouble Test Points Figure 4 21 ...
Page 104: ... 105 8 PCB LAYOUT ...
Page 105: ... 106 8 PCB LAYOUT ...
Page 113: ...10 STAND ALONE TEST 114 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 117: ...Note 118 ...
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