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Chapter 20
Port Functions
User’s Manual U16580EE3V1UD00
(2)
Control registers
(a) Port register 4 (P4)
The P4 register is an 8-bit register that controls reading the pin levels and writing the output levels
of port pins P40 to P45.
This register can be read or written in 8-bit or 1-bit units.
Reset input causes an undefined register content.
Figure 20-33:
Port Register 4 (P4)
(b) Port mode register 4 (PM4)
The PM4 register is an 8-bit register that specifies the input or output mode.
This register can be read or written in 8-bit or 1-bit units.
Reset input sets this register to FFH.
Figure 20-34:
Port Mode Register 4 (PM4)
Remark:
n = 0 to 5
After reset:
Undefined
R/W
Address:
FFFFF408H
7
6
5
4
3
2
1
0
P4
0
0
P45
P44
P43
P42
P41
P40
P4n
Input/Output Data Control of Pin P4n
0
Input mode: Low level is input
Output mode: Low level is output
1
Input mode: High level is input
Output mode: High level is output
After reset:
FFH
R/W
Address:
FFFFF428H
7
6
5
4
3
2
1
0
PM4
1
1
PM45
PM44
PM43
PM42
PM41
PM40
PM4n
Input/Output Mode Control of Pin P4n (in Port Mode)
0
Output mode
1
Input mode
Содержание V850E/PH2
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Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO...
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