3. TECHNICAL BRIEF
- 23 -
D. SIM interface
The AD6720 provides SIM Interface Module. The AD6720 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 3-5
in detail.
Signals
Description
SIM_DATA
This pin receives and sends data to SIM card.
This model can support only 3.0 volt interface SIM card.
SIM_CLK
Clock 3.25MHz frequency.
SIM_RST
Reset SIM block
(GPIO_23)
Table 3-5. SIM CONTROL SIGNALS DESCRIPTION
Figure 3-5. SIM Interface of AD6720
SIM CONNECTOR
2V85_VSIM
8
9
GND4
GND5
10
IO
6
RST
2
1
VCC
5
VPP
J100
3
CLK
GND1
4
7
GND2
GND3
C128
220n
1000p
C135
NA
C133
2V85_VSIM
0
R126
22p
C134
20K
R120
SIM_DATA
SIM_RST
SIM_CLK
Summary of Contents for KG225
Page 1: ...Date April 2006 Issue 1 0 Service Manual Model KG225 Service Manual KG225 M O B ILE CAM E R A ...
Page 3: ... 4 ...
Page 19: ...3 TECHNICAL BRIEF 20 Figure 3 4 SYSTEM INTERCONECTION OF AD6720 EXTERNAL INTERFACE ...
Page 66: ...4 TROUBLE SHOOTING 67 4 12 KEY backlight Trouble Q300 R359 TEST POINT Figure 21 ...
Page 79: ... 80 5 DOWNLOAD B Multi Download Procedure 1 Run GSM Multi Download program and select Setting ...
Page 84: ... 85 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Page 85: ... 86 ...
Page 92: ... 93 KG225 8 PCB LAYOUT ...
Page 93: ... 94 KG225 8 PCB LAYOUT ...
Page 101: ... 102 10 STAND ALONE TEST Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 109: ... 110 ...
Page 125: ...Note ...
Page 126: ...Note ...