LPC47S457-NC SMSC [SMSC Corporation], LPC47S457-NC Datasheet - Page 173

• Manufacturer Part Number: LPC47S457-NC
• Description: Advanced I/O with X-Bus Interface
• Manufacturer: SMSC [SMSC Corporation]

SMSC LPC47S45x
GP15
Default = 0x04
on VTR POR
GP16
Default = 0x04
on VTR POR
GP17
Default = 0x04
on VTR POR
GP20
Default = 0x01
on VTR POR
NAME
REG OFFSET
(R/W)
(R/W)
(R/W)
(R/W)
(hex)
2A
2B
28
29
DATASHEET
General Purpose I/0 bit 1.5
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Alternate Function Select
1=XD5
0=GPIO
Bits[6:3] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
General Purpose I/0 bit 1.6
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Alternate Function Select
1=XD6
0=GPIO
Bits[6:3] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
General Purpose I/0 bit 1.7
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Alternate Function Select
1=XD7
0=GPIO
Bits[6:3] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
General Purpose I/0 bit 2.0
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[3:2] Alternate Function Select
11=Reserved
10=nDS1 – Floppy Drive select 1 (Note 3)
01=8042 P17 function (User Note 2)
00=Basic GPIO function
Bits[6:4] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
Page 173 of 259
DESCRIPTION
Rev. 06-01-06