MiTAC 8355 用户手册
8355 N/B MAINTENANCE
8355 N/B MAINTENANCE
60
Continued to the previous table
Port 2 TTL input voltage (input high min=2v, input low max=0.8v)
P20/A8
67
KB OUT8
L
O
L
O
LH
O
Keep L
Key matrix scan output 8
P21/A9
66
KB OUT9
L
O
L
O
LH
O
Keep L
Key matrix scan output 9
P22/A10
65
KB OUT10
L
O
L
O
LH
O
Keep L
Key matrix scan output 10
P23/A11
64
KB OUT11
L
O
0
O
LH
O
Keep L
Key matrix scan output 11
P24/A12
63
KB OUT12
L
O
0
O
LH
O
Keep L
Key matrix scan output 12
P25/A13
62
KB OUT13
L
O
0
O
LH
O
Keep L
Key matrix scan output 13
P26/A14
61
KB OUT14
L
O
0
O
LH
O
Keep L
Key matrix scan output 14
P27/A15
60
KB OUT15
L
O
0
O
LH
O
Keep L
Key matrix scan output 15
Port 3 TTL input voltage (input high min=2v, input low max=0.8v)
P30/HDB0/D0
82
ISA SD0
T
I/O
I/O
I/O
Keep
ISA DATA bit 0
P31/HDB1/D1
83
ISA SD1
T
I/O
I/O
I/O
Keep
ISA DATA bit 1
P32/HDB2/D2
84
ISA SD2
T
I/O
I/O
I/O
Keep
ISA DATA bit 2
P33/HDB3/D3
85
ISA SD3
T
I/O
I/O
I/O
Keep
ISA DATA bit 3
P34/HDB4/D4
86
ISA SD4
T
I/O
I/O
I/O
Keep
ISA DATA bit 4
P35/HDB5/D5
87
ISA SD5
T
I/O
I/O
I/O
Keep
ISA DATA bit 5
P36/HDB6/D6
88
ISA SD6
T
I/O
I/O
I/O
Keep
ISA DATA bit 6
P37/HDB7/D7
89
ISA SD7
T
I/O
I/O
I/O
Keep
ISA DATA bit 7
Port 4 TTL input voltage (input high min=2v, input low max=0.8v)
P40/TMCI0 49
H8
PWRON
T
↓
O
L
O
LH
O
Keep
System power on, need pull down to define
initial state during reset
initial state during reset
P41/TMO0
50
H8 THRM#
T
O
L
O
H
O
Keep H
Thermal throttling control to Southbridge
P42/TMRI0 51
SCI#/
FAN SPD SW
FAN SPD SW
T
O
H
O
Keep
SCI output and Fan Speed Tachometer
Switch
Switch
P43/TMCI1/HIRQ1 52
SCI#/
FAN SPEED
FAN SPEED
T
O/I
O
O
Keep
Need invert to SCI# sending to SB
5→3V/ Fan speed tachometer
P44/TMCO1/HIRQ1
53
ISA IRQ1
T
O
0
O
O
Keep
Keyboard IRQ1
P45/TMRI1/HIRQ1
54
ISA IRQ12
T
O
0
O
O
Keep
PS2 mouse IRQ12
P46/PWM0
55
FAN ON#0
T
O
1
O
O
Keep
Fan power PWM control
P47/PWM1
56
FAN ON#1
T
O
1
O
O
Keep
Fan power PWM control