Sim Card Interface; Keypad Interface - LG 410G Service Manual

3. H/W Circuit Description

3.6 SIM Card Interface

SIM_PW_CTL
SIM_IO
The Locosto provides SIM Interface Module. The Locosto 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.
Signal
SIM_RST
SIM_CLK
SIM_DATA

3.7 KEYPAD Interface

KEYPAD
LGE Internal Use Only
V_SIM
R130
10K 4
GND1
5
VPP
6
IO
10
GND5
9
C145 GND4
D101
22p
Figure 3-6. SIM CARD Interface
This signal makes SIM card to HW default status.
This signal is transferred to SIM card.
This signal is interface datum.
V_UP SPK
V_DN
CN200
VA200
VA203
R226 680
KBR(0)
1
KB201
R228 680
KBR(1)
KB206
4
R230 680
KBR(2)
KB210
7
R232 680
KBR(3)
KB215
*
R233 680
KBR(4)
R234 680
KBC(0)
R235 680
KBC(1)
R236 680
KBC(2)
R237 680
KBC(3)
R238 680
KBC(4)
Figure 3-7 KEY MATRIX Interface
-20-
V_SIM
J100
1
VCC
2
RST
3
CLK
7
GND2
8
GND3
D102 D103
Description
R213
RPWON
EVLC14S02050
VA201 EVLC14S02050
EVLC14S02050
VA204 EVLC14S02050
OK OK SOFT
2 3
KB202 KB203 KB204 KB205
LEFT
KB207 KB208 KB209
5 6
UP
KB211 KB212 KB213 KB214
8 9
RIGHT
KB216 KB217 KB218 CLEAR
0 #
DOWN
- 24 - Copyright © 2009 LG Electronics. Inc. All right reserved.
SIM_RST
SIM_CLK
C146 C147
0.1u 22p
END
KB200
150
VA202
EVLC14S02050
SOFT1
MENU
SEND
CLEAR
Only for training and service purposes