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8.2 Registers and Assignment of Pins Serving as External Pins
The registers related to I/O port setting are listed as follows.
n Registers for I/O ports
Table 8-2 lists the registers for each port.
Port 0 data register (PDR0
Port 1 data register (PDR1
Port 3 data register (PDR3
Port 4 data register (PDR4
Port 5 data register (PDR5
Port 6 data register (PDR6
Port 7 data register (PDR7
Port 8 data register (PDR8
Port 9 data register (PDR9)
Port 0 direction register (DDR0)
Port 1 direction register (DDR1)
Port 3 direction register (DDR3)
Port 4 direction register (DDR4)
Port 5 direction register (DDR5)
Port 6 direction register (DDR6)
Port 7 direction register (DDR7)
Port 8 direction register (DDR8)
Port 9 direction register (DDR9)
Analog input enable register (ADER)
R/W : Both read and write
X
: Undefined
-
: Unused
Table 8-2 Registers for Each Port
Register Name
)
)
)
)
)
)
)
)
I/O PORT
Read/Write
Address
R/W
000000
R/W
000001
R/W
000003
R/W
000004
R/W
000005
R/W
000006
R/W
000007
R/W
000008
R/W
000009
R/W
000010
R/W
000011
R/W
000013
R/W
000014
R/W
000015
R/W
000016
R/W
000017
R/W
000018
R/W
000019
R/W
00001A
8-5
Initial value
XXXXXXXX
H
B
- - XXXXXX
H
B
XX - - - - - -
H
B
XXXXXXXX
H
B
XXXXXXXX
H
B
XXXXXXXX
H
B
XXXXXXXX
H
B
XXXXXXXX
H
B
- - - - - - XX
H
B
00000000
H
B
- - 000000
H
B
00 - - - - - -
H
B
00000000
H
B
00000000
H
B
00000000
H
B
00000000
H
B
00000000
H
B
- - - - - - - 00
H
B
11111111
H
B
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