
S1C8F626 TECHNICAL MANUAL
EPSON
47
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Ports)
Table 5.6.6.1(b) I/O port control bits
SR R/W
Address Bit
Name
Function
Comment
10
00FF67 D7
D6
D5
D4
D3
D2
D1
D0
IFLP17
IFLP16
IFLP15
IFLP14
IFLP13
IFLP12
IFLP11
IFLP10
0R/W
P17 input I/F level select register
P16 input I/F level select register
P15 input I/F level select register
P14 input I/F level select register
P13 input I/F level select register
P12 input I/F level select register
P11 input I/F level select register
P10 input I/F level select register
CMOS
Schmitt
CMOS
level
00FF68 D7
D6
D5
D4
D3
D2
D1
D0
IOC27
IOC26
IOC25
IOC24
IOC23
IOC22
IOC21
IOC20
P27 I/O control register
P26 I/O control register
P25 I/O control register
P24 I/O control register
P23 I/O control register
P22 I/O control register
P21 I/O control register
P20 I/O control register
0R/W
Output
Input
00FF6A D7
D6
D5
D4
D3
D2
D1
D0
P27D
P26D
P25D
P24D
P23D
P22D
P21D
P20D
P27 I/O port data
P26 I/O port data
P25 I/O port data
P24 I/O port data
P23 I/O port data
P22 I/O port data
P21 I/O port data
P20 I/O port data
1R/W
High
Low
00FF6C D7
D6
D5
D4
D3
D2
D1
D0
PULP27
PULP26
PULP25
PULP24
PULP23
PULP22
PULP21
PULP20
1R/W
On
Off
P27 pull-up control register
P26 pull-up control register
P25 pull-up control register
P24 pull-up control register
P23 pull-up control register
P22 pull-up control register
P21 pull-up control register
P20 pull-up control register
00FF6E D7
D6
D5
D4
D3
D2
D1
D0
IFLP27
IFLP26
IFLP25
IFLP24
IFLP23
IFLP22
IFLP21
IFLP20
0R/W
P27 input I/F level select register
P26 input I/F level select register
P25 input I/F level select register
P24 input I/F level select register
P23 input I/F level select register
P22 input I/F level select register
P21 input I/F level select register
P20 input I/F level select register
CMOS
Schmitt
CMOS
level
D7
D6
D5
D4
D3
D2
D1
D0
00FF30
MODE16_A
PTNREN_A
–
PTOUT0
PTRUN0
PSET0
CKSEL0
"0" when being read
Reserved register
"0" when being read
0
–
0
R/W
W
R/W
PTM0–1 8/16-bit mode selection
External clock 0 noise rejector selection
–
R/W register
PTM0 clock output control
PTM0 Run/Stop control
PTM0 preset
PTM0 input clock selection
16
-bit x 1
Enable
–
1
On
Run
Preset
External clock
8
-bit x 2
Disable
–
0
Off
Stop
No operation
Internal clock