BUFFER TYPE
PER
FUNCTION
(NOTE 1)
BUFFER
TYPE
POWER
WELL
PIN #
NAME
FUNCTION
29
30
32
PCI_RESET# PCI Reset
PCI_I
PCI_I
PCI_I
VCC
VCC
VCC
LPCPD#
PCI_CLK
Power Down (Note 2)
PCI_I
PCI Clock
PCI_ICL
K
PCI_ICLK
33
57
58
SER_IRQ
Serial IRQ
PCI_IO
PCI_IO
VCC
FAN CONTROL PINS (2)
General Purpose I/O /Fan Tachometer Input IO8
GP32/
FAN_TACH
(I/O8/OD8)/I
VCC
(Note 13)
GP33 /FAN
General Purpose I/O /Fan Control (Note 4)
IO12
(I/O12/OD12)/
(O12/OD12)
VCC
(Note 13)
KEYBOARD/MOUSE (6)
59
KDAT
Keyboard Data
IOD16
IOD16
VCC
(Note 13)
60
61
KCLK
MDAT
Keyboard Clock
Mouse Data
IOD16
IOD16
IOD16
IOD16
VCC
VCC
(Note 13)
62
66
MCLK
Mouse Clock
IOD16
IO8
IOD16
VCC
GP36
/nKBDRST
General Purpose I/O /Keyboard Reset
(Note 8)
(I/O8/OD8) /O8
VCC
(Note 13)
67
GP37 /A20M
General Purpose I/O /Gate A20 (Note 8)
IO8
(I/O8/OD8) /O8
VCC
(Note 13)
PARALLEL PORT INTERFACE (17)
69
70
nINIT /nDIR
Initiate Output/FDC Direction Control
OP14
OP14
(OD14/OP14)
/OD14
VCC
VCC
nSLCTIN
/nSTEP
Printer Select Input/FDC Step Pulse
(OD14/OP14)
/OD14
71
72
73
PD0 /nINDEX Port Data 0/FDC Index
IS/OP14
IS/OP14
IS/OP14
IOP14/IS
IOP14/IS
IOP14/IS
VCC
VCC
VCC
PD1 /nTRK0
Port Data 1/FDC Track 0
PD2
Port Data 2/FDC Write Protected
/nWRTPRT
74
75
PD3
/nRDATA
Port Data 3/FDC Read Disk Data
Port Data 4/FDC Disk Change
IS/OP14
IS/OP14
IOP14/IS
IOP14/IS
VCC
VCC
PD4
/nDSKCHG
76
77
78
80
PD5
Port Data 5
IOP14
IOP14
IOP14
IO12
IOP14
VCC
VCC
VCC
VCC
PD6 /nMTR0
PD7
Port Data 6/FDC Motor On 0
Port Data 7
IOP14/OD14
IOP14
SLCT
Printer Selected Status/FDC Write Gate
I/OD12
/nWGATE
81
82
PE /nWDATA
Paper End/FDC Write Data
Busy/FDC Motor On
IO12
IO12
I/OD12
I/OD12
VCC
VCC
BUSY
/nMTR1
83
84
nACK /nDS1
Acknowledge/FDC Drive Select 1
Error/FDC Head Select
IO12
IO12
I/OD12
I/OD12
VCC
VCC
nERROR
/nHDSEL
85
nALF
/nDRVDEN0
Autofeed Output/FDC Density Select
OP14
(OD14/OP14)/
OD14
VCC
SMSC DS – LPC47S45x
Page 13 of 259
Rev. 07/09/2001
DATASHEET
SMSC [ SMSC CORPORATION ]
