lpc47s457-ns Standard Microsystems Corp., lpc47s457-ns Datasheet - Page 115

• Manufacturer Part Number: lpc47s457-ns
• Description: Advanced I/o With X-bus Interface
• Manufacturer: Standard Microsystems Corp.

6.12 General Purpose I/O
The LPC47S45x provides a set of flexible Input/Output control functions to the system designer through the 55
dedicated independently programmable General Purpose I/O pins (GPIO). The GPIO pins can perform basic I/O and
many of them can be individually enabled to generate an SMI and a PME.
6.12.1 GPIO PINS
The following pins include GPIO functionality. These pins are defined in the table below.
SMSC LPC47S45x
PIN
100
101
20
31
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
57
58
64
65
66
67
95
97
98
99
6
7
GP40 /DRVDEN0
GP41 /DRVDEN1
GP42 /IO_PME#
GP43 /DDRC
GP80
GP81
GP82
GP83
GP84
GP85
GP86
GP87
GP62 /IRQINC
GP20 /P17 /DS1#
GP21 /P16
GP22 /P12 / MTR1#
GP23 /IRQIND
GP24 /P17
GP25 /P12
GP26 SYSOPT
GP60 /LED1
GP61 /LED2
GP27 /IO_SMI#
GP30 /nXCS2
GP31 /nXCS3
GP32 /FAN_TACH
GP33 /FAN
GP34 /IRQINA
GP35 /IRQINB
GP36 /nKBDRST
GP37 /A20M
GP50 /RI2#
GP51 /DCD2#
GP52 /RXD2 /IRRX
GP53 /TXD2 /IRTX
GP54 /DSR2#
GP55 /RTS2# /SADR0
NAME
VCC
VCC (Note 1)
VTR
VCC (Note 1)
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VTR (Note 1)
VTR (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VCC (Note 1)
VTR (Note 1)
VCC (Note 1)
VCC (Note 1)
Table 56 − GPIO Pin Functionality
POWER WELL
DATASHEET
Page 115 of 259
Input
Input
Input
Input
Output,low
Output, low
Output, low
Output, low
Output, high
Output, high
Output, high
Output, high
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Output, low
Input
Input
REGISTER
DEFAULT
ON VTR
POR
REGISTER
Output, low
Output, low
DEFAULT
ON VCC
Function
GPIO
POR
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
FUNCTIONALITY
IO_PME#
SMI/PME
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
PME/SMI
/IO_SMI#
PME
-
-
-
-
-
-
-
-
-
Rev. 08-10-09