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Chapter 4
Port Functions
User’s Manual U16702EE3V2UD00
(c) Port mode control register CM (PMCCM)
This is an 8-bit register used to specify the port mode/control mode.
It can be read and written in 8-bit or 1-bit units.
Remark:
External bus functions are only valid for the µPD70F3403 and µPD70F3403A
Figure 4-53:
Port Mode Control Register CM (PMCCM) Format
Note:
PMCCM4, PMCCM5: please set 0 any time.
Symbol
7
6
5
4
3
2
1
0
Address
After reset
PMCCM
0
0
0
Note
0
Note
PMCCM3 PMCCM2 PMCCM1 PMCCM0 FFFFF04CH
00H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PMCCM3
PCM3 pin operation mode specification
0
I/O port
1
HLDRQ input (Bus hold request signal input)
PMCCM2
PCM2 pin operation mode specification
0
I/O port
1
HLDAK output (Bus hold acknowledge signal output)
PMCCM1
PCM1 pin operation mode specification
0
I/O port
1
CLKOUT output (External bus base clock output)
PMCCM0
PCM0 pin operation mode specification
0
I/O port
1
WAIT input (External wait input for bus cycle)
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