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HD6433636SW Scheda tecnica(PDF) 68 Page - Renesas Technology Corp

Il numero della parte HD6433636SW
Spiegazioni elettronici  8-Bit Microcomputer
PDF  418 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433636SW Scheda tecnica(HTML) 68 Page - Renesas Technology Corp

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54
To avoid this problem, store a copy of the PCR6 data in a work area in memory. Perform the bit
manipulation on the data in the work area, then write this data to PCR6.
[A: Prior to executing BCLR]
MOV. B
#3F
,
R0L
MOV. B
R0L,
@RAM0
MOV. B
R0L,
@PCR6
The PCR6 value (H'3F) is written to a work area in
memory (RAM0) as well as to PCR6.
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
00111111
[B: BCLR instruction executed]
BCLR
#0,
@RAM0
The BCLR instruction is executed designating the PCR6
work area (RAM0).
[C: After executing BCLR]
MOV. B
@RAM0, R0L
MOV. B
R0L,
@PCR6
The work area (RAM0) value is written to PCR6.
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
0011111
0
PDR6
10000000
RAM0
0011111
0



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