BUFFER TYPE
PER
FUNCTION
(NOTE 1)
BUFFER
TYPE
POWER
WELL
PIN #
NAME
FUNCTION
107
108
nXWR /GP70
nXRD /GP71
X-BUS Write (Note 10) /General Purpose
I/O
O8
O8
O8 /(I/O8/OD8)
VCC
VCC
X_BUS Read (Note 10) /General Purpose
I/O
O8 /(I/O8/OD8)
109
110
111
112
113
114
XA0 /GP72
XA1 /GP73
XA2 /GP74
XA3 /GP75
X-BUS Address 0 /General Purpose I/O
X-BUS Address 1 /General Purpose I/O
X-BUS Address 2 /General Purpose I/O
X-BUS Address 3 /General Purpose I/O
IO8
IO8
IO8
IO8
O8
IO8 /(I/O8/OD8) VCC
IO8 /(I/O8/OD8) VCC
IO8 /(I/O8/OD8) VCC
IO8 /(I/O8/OD8) VCC
nXCS0/ GP76 X-Bus Chip Select 0 /General Purpose I/O
O8 /(I/O8/OD8)
O8 /(I/O8/OD8)
VCC
VCC
XCS1/ GP77
X-Bus Chip Select 1(Note 11) /General
Purpose I/O
O8
54
55
GP30/ nXCS2 General Purpose I/O/ X-Bus Chip Select 2
GP31/ nXCS3 General Purpose I/O / X-Bus Chip Select 3
LCD PINS (1)
IO8
IO8
(I/O8/OD8)/ O8
(I/O8/OD8)/ O8
VCC
(Note 13)
VCC
(Note 13)
115
LCDCS
LCD Panel Chip Select
SMBUS PINS (2)
O8
O8
VCC
104
105
SCLK
SDAT
SMBus Clock
IOD12
IOD12
IOD12
IOD12
VCC
VCC
General Purpose I/O /SMBus Data
GENERAL PURPOSE I/O PINS (23)
20
31
GP42
/IO_PME#
General Purpose I/O / Power Management
Event Output
IO12
IO8
(I/O12/OD12)
/(O12/OD12)
VTR
GP43/DDRC
General Purpose I/O / Device Disable Reg.
Control
(I/O8/OD8)/I
VCC
(Note 13)
VCC
35
36
37
38
39
40
41
42
43
GP80
GP81
GP82
GP83
GP84
GP85
GP86
GP87
General Purpose I/O
General Purpose I/O
General Purpose I/O
General Purpose I/O
General Purpose I/O
General Purpose I/O
General Purpose I/O
General Purpose I/O
IO8
IO8
IO8
IO8
IO8
IO8
IO8
IO8
IO8
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)
(I/O8/OD8)/ I
VCC
VCC
VCC
VCC
VCC
VCC
VCC
GP62/IRQINC General Purpose I/O /IRQ Input C
VCC
(Note 13)
VCC
44
GP20
/P17/nDS1
General Purpose I/O / P17 /Drive Select 1
IO12
(I/O12/OD12)/
IO12/(O12/OD1
2)
(Note 13)
45
46
GP21 /P16
General Purpose I/O / P16
IO8
(I/O8/OD8)/IO8
VCC
(Note 13)
VCC
GP22 /P12
/MTR1#
General Purpose I/O / P12 /Motor On 1
IO12
(I/O12/OD12)
/IO12
/(O12/OD12)
(Note 13)
47
48
49
GP23/IRQIND General Purpose I/O /IRQ Input D
IO8
IO8
IO8
(I/O8/OD8)/I
VCC
(Note 13)
GP24/P17
General Purpose I/O / P17
General Purpose I/O /P12
(I/O8/OD8) /IO8 VCC
(Note 13)
(I/O8/OD8) /IO8 VCC
(Note 13)
GP25/P12
SMSC DS – LPC47S45x
Page 15 of 259
Rev. 07/09/2001
DATASHEET
SMSC [ SMSC CORPORATION ]
