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10 I/O PORTS
Address Bit
Name
00FF60 D7
IOC27
P27 I/O control register
D6
IOC26
P26 I/O control register
D5
IOC25
P25 I/O control register
D4
IOC24
P24 I/O control register
D3
IOC23
P23 I/O control register
D2
IOC22
P22 I/O control register
D1
IOC21
P21 I/O control register
D0
IOC20
P20 I/O control register
00FF62 D7
P27D
P27 I/O port data
D6
P26D
P26 I/O port data
D5
P25D
P25 I/O port data
D4
P24D
P24 I/O port data
D3
P23D
P23 I/O port data
D2
P22D
P22 I/O port data
D1
P21D
P21 I/O port data
D0
P20D
P20 I/O port data
00FF64 D7
PULP27
P27 pull-up control register
D6
PULP26
P26 pull-up control register
D5
PULP25
P25 pull-up control register
D4
PULP24
P24 pull-up control register
D3
PULP23
P23 pull-up control register
D2
PULP22
P22 pull-up control register
D1
PULP21
P21 pull-up control register
D0
PULP20
P20 pull-up control register
00FF66 D7
PCP27
P27 input comparison register
D6
PCP26
P26 input comparison register
D5
PCP25
P25 input comparison register
D4
PCP24
P24 input comparison register
D3
PCP23
P23 input comparison register
D2
PCP22
P22 input comparison register
D1
PCP21
P21 input comparison register
D0
PCP20
P20 input comparison register
00FF68 D7
–
–
D6
CTP22H
P24–P27 port chattering-eliminate setup
(Input level check time)
D5
CTP21H
D4
CTP20H
D3
–
–
D2
CTP22L
P20–P23 port chattering-eliminate setup
(Input level check time)
D1
CTP21L
D0
CTP20L
70
Table 10.6.1(b) I/O port control bits
Function
CTP22H
CTP21H
CTP20H
1
1
1
1
0
1
0
1
1
0
0
1
1
1
0
1
0
0
0
1
0
0
0
0
CTP22L
CTP21L
CTP20L
1
1
1
1
0
1
0
1
1
0
0
1
1
1
0
1
0
0
0
1
0
0
0
0
1
Output
High
On
Interrupt
occurred
at falling
edge
–
Check time
[sec]
4/f
OSC3
2/f
OSC3
1/f
OSC3
4096/f
OSC1
2048/f
OSC1
512/f
OSC1
128/f
OSC1
None
–
Check time
[sec]
4/f
OSC3
2/f
OSC3
1/f
OSC3
4096/f
OSC1
2048/f
OSC1
512/f
OSC1
128/f
OSC1
None
EPSON
0
SR R/W
Comment
0
R/W
Input
1
R/W
Low
1
R/W
Off
Interrupt
occurred
1
R/W
at rising
edge
0
R
–
"0" when being read
0
R/W
0
R/W
0
R/W
0
R
–
"0" when being read
0
R/W
0
R/W
0
R/W
S1C88655 TECHNICAL MANUAL
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