REG OFFSET
(hex)
NAME
DESCRIPTION
General Purpose I/0 bit 5.1
GP51
40
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[3:2] Alternate Function Select
11=Reserved
Default = 0x01
on VTR POR
(R/W)
10=Reserved
01=nDCD2
00=GPIO
Bits[6:4] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
GP52
41
General Purpose I/0 bit 5.2
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[3:2] Alternate Function Select
11=Reserved
Default = 0x01
on VTR POR
(R/W)
10=Reserved
01=RXD2
00=GPIO
Bits[6:4] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
GP53
42
General Purpose I/0 bit 5.3
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[3:2] Alternate Function Select
11=Reserved
Default = 0x00
(R/W)
on VTR POR, VCC
POR and Hard
Reset
10=Reserved
(Note 3)
01=TXD2
00=GPIO
Bits[6:4] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
GP54
43
General Purpose I/0 bit 5.4
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[3:2] Alternate Function Select
11=Reserved
Default = 0x01
on VTR POR
(R/W)
10=Reserved
01=nDSR2
00=GPIO
Bits[6:4] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
SMSC DS – LPC47M14X
Page 144
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
