Service Manual
21
Pin No. Name Function Valid Level
20 RS Data and command -
21 WR Write signal L
22 /OE Read signal L
24
25
3V3D Power supply: 3.3V -
27 LEDA Power supply for backlight -
28
29
30
LEDK1
LEDK2
LEDK3
Backlight control L
J7007: 21-Pin Keyboard Interface
Pin No. Name Function Valid Level
1
4
21
GND Ground (analog & digital) L
2
3
LOW-MIC+
LOW-MIC-
Lower MIC interface -
5
6
16
I2C-SCL
I2C-SDA
L_INT
Reserved -
7
8
9
10
11
KB-C3
KB-C4
KB-C0
KB-C1
KB-C2
Keyboard column -
12
13
14
KB-R1
KB-R2
KB-R3
Keyboard row L
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