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D. SIM interface
The AD6726 provides SIM Interface Module. The AD6726 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
SIM_DATA
SIM_CLK
SIM_RST
(GPIO_23)
SIM_DATA
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
This pin receives and sends data to SIM card.
This model can support 3.0 volt and 1.8 volt interface SIM card.
Clock 3.25MHz frequency.
Reset SIM block
Table 3.5.D SIM CONTROL SIGNALS DESCRIPTION
2V85_VSIM
R401
15K
4
C5
5
R402
C6
6
C7
10
0
GND4
9
GND3
C402
DNI
Figure 3.5.D2 SIM Interface of AD6726
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3. TECHNICAL BRIEF
Description
2V85_VSIM
J400
1
C1
2
C2
3
C3
7
GND1
8
GND2
C401
C403
220n
DNI
SIM_RST
SIM_CLK
C404
1000p
LGE Internal Use Only
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