DESCRIPTION OF PIN FUNCTIONS
NAME TOTAL
PIN
No./QFP
BUFFER
TYPE
SYMBOL
PROCESSOR/HOST INTERFACE (36)
37:40,
42:45
20:30
31
System Data Bus
8
SD[0:7]
IO12
11-bit System Address Bus
Chip Select/SA11 (Note 1)
Address Enable
11
1
1
1
1
1
1
1
1
1
1
1
1
SA[0:10]
nCS/SA11
AEN
I
I
I
36
55
I/O Channel Ready
IOCHRDY
RESET_DRV
SER_IRQ
PCI_CLK
DRQ1
OD12
IS
46
ISA Reset Drive
33
Serial IRQ
IO12
ICLK
O12
O12
O12/IO12
I
32
PCI Clock for Serial IRQ (33MHz/30MHz)
DMA Request 1
50
48
DMA Request 2
DRQ2
52
DMA Request 3/8042 P12
DMA Acknowledge 1
DMA Acknowledge 2
DMA Acknowledge 3/8042 P16
DRQ3/P12
nDACK1
nDACK2
nDACK3/
P16
47
49
I
51
I/IO12
54
34
35
4
Terminal Count
1
1
1
1
1
TC
I
I/O Read
nIOR
I
I/O Write
nIOW
I
Power Management Event
32.768 Trickle Clock Input
CLOCKS (1)
nPME
OD24
ICLK
6
CLOCK132
19
14.318MHz Clock Input
1
CLOCKI
ICLK
INFRARED INTERFACE (2)
61
62
Infrared Rx
1
1
IRRX
IRTX
I
Infrared Tx (Note 4), (Note 5)
O24PD
POWER PINS (8)
53,65,
93
Power
VCC
7,41,
60,76
Ground
VSS
VTR
18
Trickle Voltage
6
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