CHAPTER 4 PORT FUNCTIONS
(2) Registers
(a) Port 5 register (P5)
The port 5 register (P5) is an 8-bit register that controls pin level read and output level write. This register
can be read/written in 8-bit or 1-bit units.
After Reset: Undefined
R/W
Address: FFFFF40AH
P5
0
0
P55
P54
P53
P52
P51
P50
P5n
0
Control of output data (in output mode) (n = 0 to 5)
Output 0
Output 1
1
Remark In input mode: When read, port 5 (P5) returns the current pin level.
When written to, the data written to P5 is written. This has no
influence on the input pins.
In output mode: When read, port 5 (P5) returns the P5 value. When written to, the
value is written to P5 and the written value is immediately output.
(b) Port 5 mode register (PM5)
This is an 8-bit register that specifies the input mode/output mode.
This register can be read in 8-bit or 1-bit units.
After Reset: FFH
R/W
1
Address: FFFFF42AH
PM5
1
PM55
PM54
PM53
PM52
PM51
PM50
PM5n
Control of I/O mode (n = 0 to 5)
0
1
Output mode
Input mode
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User’s Manual U15862EJ3V0UD
NEC [ NEC ]
