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HD6433644R Datasheet(PDF) 74 Page - Renesas Technology Corp

Part # HD6433644R
Description  8-Bit Single-Chip Microcomputer
PDF  549 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433644R Datasheet(HTML) 74 Page - Renesas Technology Corp

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Section 2 CPU
Rev. 6.00 Sep 12, 2006 page 54 of 526
REJ09B0326-0600
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
#80,
R0L
MOV. B
R0L,
@RAM0
MOV. B
R0L,
@PDR3
The PDR3 value (H'80) is written to a work area in
memory (RAM0) as well as to PDR3.
P37
P36
P35
P34
P33
P32
P31
P30
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
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
0
RAM0
1
0
0
0
0
0
0
0
[B: BSET instruction executed]
BSET
#0
,
@RAM0
The BSET instruction is executed designating the PDR3
work area (RAM0).
[C: After executing BSET]
MOV. B
@RAM0, R0L
MOV. B
R0L,
@PDR3
The work area (RAM0) value is written to PDR3.
P37
P36
P35
P34
P33
P32
P31
P30
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
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
1
RAM0
1
0
0
0
0
0
0
1



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