DESCRIPTION OF PIN FUNCTIONS
TABLE 1 - 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
54
56
58
61
60
63
41
System Data Bus
8
SD[0:7]
IO12
16-bit System Address Bus
Address Enable
I/O Channel Ready
ISA Reset Drive
Serial IRQ/IRQ15
PCI Clock/IRQ14/GP50
DMA Request 0
16
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SA[0:15]
AEN
I
I
IOCHRDY
RESET_DRV
SER_IRQ
PCI_CLK
DRQ0
OD12
IS
IO12
IO12
O12
O12
O12
I
DMA Request 1
DMA Request 2
DRQ1
DRQ2
DMA Acknowledge 0
DMA Acknowledge 1
DMA Acknowledge 2
DMA Request 3
DMA Acknowledge 3
Terminal Count
nDACK0
nDACK1
nDACK2
DRQ3
nDACK3
TC
I
I
O12
I
I
I
I
I/O Read
I/O Write
nIOR
nIOW
42
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
XTAL2
ICLK
ICLK
OCLK2
O8
CLK32OUT
POWER PINS (10)
62, 93,
121
7, 48,
74, 104
67
+5V Supply Voltage
Digital Ground
3
4
VCC
VSS
Analog Ground
Trickle Supply Voltage
Battery Voltage
1
1
1
AVSS
VTR
VBAT
69
65
POWER MANAGEMENT (3)
19
20
21
Power On
Button In
1
1
1
nPOWERON
BUTTON_IN
nPME
OD24
I
O12
Power Management Event/SCI/IRQ9
FDD INTERFACE (16)
16
11
10
Read Disk Data
Write Gate
Write Disk Data
1
1
1
nRDATA
nWGATE
nWDATA
IS
O24
O24
7
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