HD6433832S Datasheet, PDF (72/560 Pages) Renesas Technology Corp – single-chip microcomputers

As a result of this operation, bit 0 in PDR3 becomes 1, and P3₀ outputs a high-level signal.
However, bits 7 and 6 of PDR3 end up with different values.
To avoid this problem, store a copy of the PDR3 data in a work area in memory. Perform the bit
manipulation on the data in the work area, then write this data to PDR3.
[A: Prior to executing BSET]
MOV. B
MOV. B
MOV. B
#80,
R0L,
R0L,
R0L
@RAM0
@PDR3
The PDR3 value (H'80) is written to a work area in memory
(RAM0) as well as to PDR3.
Input/output
Pin state
PCR3
PDR3
RAM0
P3₇
Input
Low
level
0
1
1
P3₆
Input
High
level
0
0
0
P3₅
Output
Low
level
1
0
0
P3₄
Output
Low
level
1
0
0
P3₃
Output
Low
level
1
0
0
P3₂
Output
Low
level
1
0
0
P3₁
Output
Low
level
1
0
0
P3₀
Output
Low
level
1
0
0
[B: BSET instruction executed]
BSET #0 , @RAM0
[C: After executing BSET]
MOV. B @RAM0, R0L
MOV. B R0L, @PDR3
The BSET instruction is executed designating the PDR3
work area (RAM0).
The work area (RAM0) value is written to PDR3.
Input/output
Pin state
PCR3
PDR3
RAM0
P3₇
Input
Low
level
0
1
1
P3₆
Input
High
level
0
0
0
P3₅
Output
Low
level
1
0
0
P3₄
Output
Low
level
1
0
0
P3₃
Output
Low
level
1
0
0
P3₂
Output
Low
level
1
0
0
P3₁
Output
Low
level
1
0
0
P3₀
Output
High
level
1
1
1
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