Filter
Top Products
118
CHAPTER 5 I/O Port
5.1 Overview of I/O Port
The MB91191/MB91192 series have the 102 output ports. In terms of ports, there are
ports 2, 3, 5, and 6 that are also used for external bus functions, and ports 0, 1, 4, and 7
to D that are also used for peripheral functions. Ports other than ports 0, 2, and 3 have a
function selection bit per bit, and a port function, peripheral function, or external bus
function can be selected.
■ Register List of I/O Port
Figure 5.1-1 Register list of I/O Port
7 0
Port 3 data register
Port 2 data register
Port 1 data register
Port 0 data register
Port 7 data register
Port 6 data register
Port 5 data register
Port 4 data register
Port B data register
Port A data register
Port 9 data register
Port 8 data register
Port D data register
Port C data register
Port 3 Direction register
Port 2 Direction register
Port 1 Direction register
Port 0 Direction register
Port 7 Direction register
Port 6 Direction register
Port 5 Direction register
Port 4 Direction register
Port B Direction register
Port A Direction register
Port 9 Direction register
Port 8 Direction register
Port D Direction register
Port C Direction register
Port 1 function selection register
Port 7 function selection register
Port 6 function selection register
Port 5 function selection register
Port 4 function selection register
Port B input enable register
Port A input enable register
Port 9 function selection register
Port 8 function selection register
Port D function selection register
Port C function selection register
bit
PDR3
PDR2
PDR1
PDR0
PDR7
PDR6
PDR5
PDR4
PDRB
PDRA
PDR9
PDR8
PDRD
PDRC
DDR3
DDR2
DDR1
DDR0
DDR7
DDR6
DDR5
DDR4
DDRB
DDRA
DDR9
DDR8
DDRD
DDRC
PFS1
PFS7
PFS6
PFS5
PFS4
PIEB
PIEA
PFS9
PFS8
PFSD
PFSC
Address: 000000
H
000001
H
000002
H
000003
H
000004
H
000005
H
000006
H
000007
H
000010
H
000011
H
000012
H
000013
H
000016
H
000017
H
000008
H
000009
H
00000A
H
00000B
H
00000C
H
00000D
H
00000E
H
00000F
H
000018
H
000019
H
00001A
H
00001B
H
00001E
H
00001F
H
000602
H
000604
H
000605
H
000606
H
000607
H
000020
H
000021
H
000022
H
000023
H
000026
H
000027
H