DESCRIPTION OF PIN FUNCTIONS
PIN
No./QFP
NAME
TOTAL
SYMBOL
BUFFER TYPE
PROCESSOR/HOST INTERFACE (40)
44-47,
49-52
23-38
43
64
53
40
39
55
57
59
61
54
56
58
60
63
41
42
16-bit System Address Bus
Address Enable
I/O Channel Ready
ISA Reset Drive
Serial IRQ/IRQ15
PCI Clock/IRQ14/GP50
DMA Request 0
DMA Request 1
DMA Request 2
DMA Request 3
DMA Acknowledge 0
DMA Acknowledge 1
DMA Acknowledge 2
DMA Acknowledge 3
Terminal Count
I/O Read
I/O Write
CLOCKS (4)
22
66
68
18
14.318MHz Clock Input
32.768kHz Crystal Input
32.768kHz Crystal Driver
32.768kHz Clock Out
POWER PINS (10)
62, 93,
121
+5V Supply Voltage
3
VCC
1
1
1
1
CLOCKI
XTAL1
XTAL2
CLK32OUT
I
ICLK
OCLK
O8
16
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SA[0:15]
AEN
IOCHRDY
RESET_DRV
SER_IRQ
PCI_CLK
DRQ0
DRQ1
DRQ2
DRQ3
nDACK0
nDACK1
nDACK2
nDACK3
TC
nIOR
nIOW
I
I
OD12
IS
IO12
IO12
O12
O12
O12
O12
I
I
I
I
I
I
I
System Data Bus
8
SD[0:7]
IO12
7
SMSC [ SMSC CORPORATION ]
