REG OFFSET
(hex)
NAME
DESCRIPTION
General Purpose I/0 bit 2.2
GP22
2D
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[3:2] Alternate Function Select
11= nMTR1 – Floppy Motor Select 1 (Note 4)
10=Either Edge Triggered Interrupt Input 1 (Note 1)
01=8042 P12 function (Note 10)
00=Basic GPIO function
Default =0x01
on VTR POR
(R/W)
Bits[6:4] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
N/A
2E
(R)
2F
Reserved – reads return 0
GP24
General Purpose I/0 bit 2.4
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Reserved
Default = 0x01
on VTR POR
(R/W)
Bits[6:3] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
GP25
30
(R/W)
General Purpose I/0 bit 2.5
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Alternate Function Select
1=MIDI_IN
0=GPIO
Bits[6:3] Reserved
Default = 0x01
on VTR POR
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
GP26
31
General Purpose I/0 bit 2.6
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Alternate Function Select
1=MIDI_OUT
0=GPIO
Bits[6:3] Reserved
Default = 0x01
on VTR POR
(R/W)
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
GP27
32
General Purpose I/0 bit 2.7
Bit[0] In/Out : =1 Input, =0 Output
Bit[1] Polarity : =1 Invert, =0 No Invert
Bit[2] Alternate Function Select
1=nIO_SMI (Note 5)
0=GPIO
Default = 0x01
on VTR POR
(R/W)
Bits[6:3] Reserved
Bit[7] Output Type Select
1=Open Drain
0=Push Pull
SMSC DS – LPC47M14X
Page 140
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
