MiTAC 8355 service manual KB OUT8

8355 N/B MAINTENANCE

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
P41/TMO0	50	H8 THRM#	T	O	L	O	H	O	Keep H	Thermal throttling control to Southbridge
P42/TMRI0	51	SCI#/	T	O	H			O	Keep	SCI output and Fan Speed Tachometer
		FAN SPD SW								Switch
P43/TMCI1/HIRQ1	52	SCI#/	T	O/I		O		O	Keep	Need invert to SCI# sending to SB
		FAN SPEED								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

60