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HD6433635SW Datasheet(PDF) 66 Page - Renesas Technology Corp

Part # HD6433635SW
Description  8-Bit Microcomputer
PDF  418 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433635SW Datasheet(HTML) 66 Page - Renesas Technology Corp

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52
To avoid this problem, store a copy of the PDR6 data in a work area in memory. Perform the bit
manipulation on the data in the work area, then write this data to PDR6.
[A: Prior to executing BSET]
MOV. B
#80,
R0L
MOV. B
R0L,
@RAM0
MOV. B
R0L,
@PDR6
The PDR6 value (H'80) is written to a work area in
memory (RAM0) as well as to PDR6.
P6
7
P6
6
P6
5
P6
4
P6
3
P6
2
P6
1
P6
0
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
Low
level
PCR6
00111111
PDR6
10000000
RAM0
10000000
[B: BSET instruction executed]
BSET
#0,
@RAM0
The BSET instruction is executed designating the PDR6
work area (RAM0).
[C: After executing BSET]
MOV. B
@RAM0, R0L
MOV. B
R0L,
@PDR6
The work area (RAM0) value is written to PDR6.
P6
7
P6
6
P6
5
P6
4
P6
3
P6
2
P6
1
P6
0
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
High
level
PCR6
00111111
PDR6
1000000
1
RAM0
1000000
1



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