
Pin Assignments
24
RSDIOR#
Secondary disk IO read
O
25
RSDIOW#
Secondary disk IO write
O
27
RSIORDY
Secondary disk IO channel ready
I
29
IRQ15
Secondary disk interrupt
I
50 NC
NC
49 NC
NC
37
CDROMLED#
CDROM access indicator
O
2
CD_R
CDROM sound right signal
O
4 GND
Ground
I
1
CD_L
CDROM sound left signal
O
3 CD_RGND
Left
Ground
I
39,41,38,40,42
+5Vs
+5V power supply
I
23,43,44,45,46,48
Gnd Ground
O
47
CSEL
SELECT MASTER OR SLAVE
I
B.7 DC-IN Jack Pin Assignment
The pin assignment of the DC-IN connector is as follows:
No Signal
Description
Type
1
ADAPV+
Adapter input voltage
I
2 Gnd
Ground
O
B.8 LCD Connector Pin Assignment
The pin assignment of the LCD connector is as follows:
NO. Signal
Description
Type
22 INVENA
Flat panel backlight signal
control the LCD backlight.
O
2
LCDID0
LCD type bit0
I
4
LCDID1
LCD type bit1
I
6
LCDID2
LCD type bit2
I
8
LCDID3
LCD type bit3
20
BRIGHTNESS LCD brightness adjust voltage
O
23 TXOUTU0-
O
21
O
17 TXOUTU1-
O
15
O
11 TXOUTU2-
O
9
O
5 TXCLK-
O
3 TXCLK+
O
16 MAIL
LED
10 LED
GREEN
12 LED
AMBER
14 LED
CHG
46,48,50 +3V
24,26,28,30,32 +5V
1,7,13,19,25,31,37,43,49,34,36,38,
40,42,44
GND
18 NC
FIC A550 Service Manual
B-5