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