Only For Training And Service Purposes - LG GD580 Service Manual

3. Technical brief
3.1.12 MicroSD Interface card
GD580 supports the MicroSD card interface as external memory card.
MicroSD card has 4-data line, so GD580 uses 4-data lines.
All control and data lines are connected to DB3150.
Cause of the difference between DB3150 and MicroSD card, a level shifter should be added.
APP_GP_MMC_DET
MICROSD_CMD_2V7
MICROSD_CLK_2V7
MICROSD_DAT_2V7
VDDG_2V85
Card detection
- When there are no card in MicroSD card socket, MICROSD_DETECT pin is high cause of
an external pull-up.
- If card is inserted in socket, MICROSD_DETECTpin changes Low cause of the
mechanical switch in the socket.
- VDDG_2V85 always supply power.
- If card is removed, APP_GP_MMC_DET pin changes high.
V D D E _ 1 V 8
V D D E _ 1 V 8
C 6 1 3 C 6 0
0 1 . U 4 7 .
F L
A 5
V C C
C 5
D A
B 2
M C I R O S D _ D A T 0 D A
C 1
M C I R O S D _ D A T _ D R I
D A
A 2
M C I R O S D _ D A T 1 D A
B 4
M C I R O S D _ D A T 2 D A
A 4
M C I R O S D _ D A T 3
D A
B 5
M C I R O S D _ C M D _ D R I C M
B 1
M C I R O S D _ C M D C M
A 3
M C I R O S D _ C L K
C L K
A 1
A P P _ G P _ M M C _ C L K R E T C L K
B 3
G N
C 3
G N
M C I R O S D
Figure 3-1-12. MicroSD card and Schematic of MicroSD card Interface
LGE Internal Use Only
MicroSD card Interface
Card detection, connected to GPIO of DB3150
Command/Response
Clock
Data line
Supply voltage from AB3000 internal LDO
Table 3-1-7. MicroSD card Interface
V D D G _ 2 V 8 5
5 C 6 1 2 C 6 1 4
U 0 1 . U 4 7 . U
6 0 1
D 5
A V C C B
T 0 _ D R I
D 2
T 0 A D A T 0 B M C I R O S D _ D A T 0 _ 2 V 7
T 1 2 3 _ D R I
D 1
T 1 A D A T 1 B M C I R O S D _ D A T 1 _ 2 V 7
C 4
T 2 A D A T 2 B M C I R O S D _ D A T 2 _ 2 V 7
D 4
M C I R O S D _ D A T 3 _ 2 V 7
T 3 A D A T 3 B
D _ D R I
D A
A
_ F
C 2
M C I R O S D _ C M D _ 2 V 7
D 1 C M D B
D 3
M C I R O S D _ C L K _ 2 V 7
D 2 C L K B
S N 7 4 A V C A 4 0 6 E Z X Y R
L E V E L S H F I T E R
V D D G _ 2 V 8 5
M C I R O S D _ D A T 1 _ 2 V 7
M C I R O S D _ D A T 0 _ 2 V 7
M C I R O S D _ C L K _ 2 V 7
M C I R O S D _ C M D _ 2 V 7
M C I R O S D _ D A T 3 _ 2 V 7
M C I R O S D _ D A T 2 _ 2 V 7
C 6 1 0 C 6 1 9
4 7 . U 2 2 P
- 40 - Copyright © 2009 LG Electronics. Inc. All right reserved.
I S M C L K
I S M R S T _ N
C 6 1 8
D I N
S 8
1 0
T 8
9
T 7
8
T 6
7
T 5
6
T 4
5
T 3
4
T 2
3
T 1
2
S 4
1
V D D E _ 1 V 8
S T 1
1 7
S T 2
1 8
A P P _ G P _ M M C _ D E T
Z D 6 0 3
R S B 6 8 . C S T 2 R

Only for training and service purposes