- 36 -
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. Technical Brief
3.5. SIM & uSD interface
GD310 supports 1.8V & 2.9V plug in SIM, SIM interface scheme is shown in (Figure 8).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-Gold3) and the SIM power
supply enabled by PMIC.
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
SIM_IO : SIM card bidirectional reset
Figure 8. SIM & Micro SD Circuit
The MicroSD Memory Module has eight exposed contacts on one side. The S-Gold3 is connected to the
module using a dedicated eight-pin connector
Figure 9. Micro SD Memory Card Detection Scheme
2V9_SIM
100K
R201
2V9_VMME
2V62_VIO
C206
1N
100K
R204
DNI
C207
R206
100K
C210
1U
DNI
C234
C239
27P
R219
4.7K
C245
10P
C246
100n
CN201
0
2
9
1
6
1
5
1
4
1
3
1
2
1
1
1
1
2
10
9
8
7
6
5
4
3
2
1
17
18
ST2
ST1
S4
T1
T2
T3
T4
T5
T6
T7
T8
S8
3
G
7
S
3
S
6
S
2
S
5
S
1
S
1
G
2
G
100K
R220
R221
100K
R224
100K
47
R226
MMC_DETECT
MMC_D[3]
MMC_D[0]
MMC_CMD
MMC_CLK
MMC_D[1]
MMC_D[2]
SIM_RST
SIM_IO
SIM_CLK