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EPSON
S1C63454 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
4.6.5 I/O memory of I/O ports
Table 4.6.5.1 shows the I/O addresses and the control bits for the I/O ports.
Table 4.6.5.1 Control bits of I/O ports
Address
Comment
D3
D2
Register
D1
D0
Name
Init
∗
1
1
0
FF40H
IOC03
IOC02
IOC01
IOC00
R/W
IOC03
IOC02
IOC01
IOC00
0
0
0
0
Output
Output
Output
Output
Input
Input
Input
Input
P00–P03 I/O control register
FF44H
IOC13
IOC12
IOC11
IOC10
R/W
IOC13
IOC12
IOC11
IOC10
0
0
0
0
Output
Output
Output
Output
Input
Input
Input
Input
P13 I/O control register
functions as a general-purpose register when SIF (slave) is selected
P12 I/O control register (ESIF=0)
functions as a general-purpose register when SIF is selected
P11 I/O control register (ESIF=0)
functions as a general-purpose register when SIF is selected
P10 I/O control register (ESIF=0)
functions as a general-purpose register when SIF is selected
FF45H
PUL13
PUL12
PUL11
PUL10
R/W
PUL13
PUL12
PUL11
PUL10
1
1
1
1
On
On
On
On
Off
Off
Off
Off
P13 pull-up control register
functions as a general-purpose register when SIF (slave) is selected
P12 pull-up control register (ESIF=0)
functions as a general-purpose register when SIF (master) is selected
SCLK (I) pull-up control register when SIF (slave) is selected
P11 pull-up control register (ESIF=0)
functions as a general-purpose register when SIF is selected
P10 pull-up control register (ESIF=0)
SIN pull-up control register when SIF is selected
FF46H
P13
P12
P11
P10
R/W
P13
P12
P11
P10
–
∗
2
–
∗
2
–
∗
2
–
∗
2
High
High
High
High
Low
Low
Low
Low
FF41H
PUL03
PUL02
PUL01
PUL00
R/W
PUL03
PUL02
PUL01
PUL00
1
1
1
1
On
On
On
On
Off
Off
Off
Off
P00–P03 pull-up control register
FF42H
P03
P02
P01
P00
R/W
P03
P02
P01
P00
–
∗
2
–
∗
2
–
∗
2
–
∗
2
High
High
High
High
Low
Low
Low
Low
P00–P03 I/O port data
FF70H
0
0
SCTRG
ESIF
R
R/W
0
∗
3
0
∗
3
SCTRG
ESIF
–
∗
2
–
∗
2
0
0
Trigger
Run
SIF
Invalid
Stop
I/O
Unused
Unused
Serial I/F clock trigger (writing)
Serial I/F clock status (reading)
Serial I/F enable (P1 port function selection)
P13 I/O port data
functions as a general-purpose register when SIF (slave) is selected
P12 I/O port data (ESIF=0)
functions as a general-purpose register when SIF is selected
P11 I/O port data (ESIF=0)
functions as a general-purpose register when SIF is selected
P10 I/O port data (ESIF=0)
functions as a general-purpose register when SIF is selected
*1 Initial value at initial reset
*2 Not set in the circuit
*3 Constantly "0" when being read
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