DESCRIPTION OF PIN FUNCTIONS
PIN NO.
23
24
25
30
31
26
27
28
29
138:131
140
141
143
144
128
129
127
126
142
122
124
121
91
92
93
94
IDE1 Enable (Note 4)
IDE1 Chip Select 0 (Note 4)
IDE1 Chip Select 1 (Note 4)
IOR Output (Note 4)
IOW Output (Note 4)
IDE1 Interrupt Request (Note 4)
IDE2 INTERFACE
IDE2 Chip Select 2/SA13 (Note 3, 4)
IDE2 Chip Select 3/SA14 (Note 3, 4)
IDE2 Interrupt Request/SA15 (Note 4)
Parallel Port Data Bus
Printer Select
Initiate Output
Auto Line Feed
Strobe Signal
Busy Signal
Acknowledge Handshake
Paper End
Printer Selected
Error at Printer
REAL-TIME CLOCK
32 kHz Crystal Input
32 kHz Crystal Output
Battery Voltage
KEYBOARD/MOUSE
Keyboard Data
Keyboard Clock
Mouse Data
Mouse Clock
KDAT
KCLK
MDAT
MCLK
I/OD16P
I/OD16P
I/OD16P
I/OD16P
XTAL1
XTAL2
Vbat
ICLK2
OCLK2
nHDCS2
nHDCS3
IDE2_IRQ
PD[0:7]
nSLCTIN
nINIT
nALF
nSTB
BUSY
nACK
PE
SLCT
nERROR
I/O24
I/O24
I
I/O24
OD24/O24
OD24/O24
OD24/O24
OD24/O24
I
I
I
I
I
NAME
IDE1 INTERFACE
nIDE1_OE
nHDCS0
nHDCS1
nIOROP
nIOWOP
IDE1_IRQ
O4
O24
O24
O24
O24
I
SYMBOL
BUFFER TYPE
PARALLEL PORT INTERFACE
7
SMSC [ SMSC CORPORATION ]
