SIC63616-(Rev. 1.0) NO. P53
3240-0412
Table 4.5.8.1(c) Control bits of I/O ports
D3
D2
D1
D0
Name Init
∗
1
1
0
Address
Comment
Register
FF32H
PUL43 PUL42 PUL41 PUL40
R/W
PUL43
PUL42
PUL41
PUL40
1
1
1
1
On
On
On
On
Off
Off
Off
Off
P40–P43 pull-down control register
FF33H
SMT43 SMT42 SMT41 SMT40
R/W
SMT43
SMT42
SMT41
SMT40
1
1
1
1
Schmitt
Schmitt
Schmitt
Schmitt
CMOS
CMOS
CMOS
CMOS
P40–P43 input interface level select register
FF3CH
SIP03
SIP02
SIP01
SIP00
R/W
SIP03
SIP02
SIP01
SIP00
0
0
0
0
Enable
Enable
Enable
Enable
Disable
Disable
Disable
Disable
P10–P13 interrupt select register
FF30H
P43
P42
P41
P40
R/W
P43
P42
P41
P40
1
1
1
1
High
High
High
High
Low
Low
Low
Low
P40–P43 I/O port data
FF31H
IOC43 IOC42 IOC41 IOC40
R/W
IOC43
IOC42
IOC41
IOC40
0
0
0
0
Output
Output
Output
Output
Input
Input
Input
Input
P40–P43 I/O control register
*1 Initial value at initial reset
*2 Not set in the circuit
*3 Constantly "0" when being read