hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 112

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
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]
Input/output Input
Pin state
PCR3
PDR3
RAM0
[B: BSET instruction executed]
[C: After executing BSET]
Input/output Input
Pin state
PCR3
PDR3
RAM0
Rev. 7.00 Mar 10, 2005 page 70 of 652
REJ09B0042-0700
BSET
MOV. B
MOV. B
MOV. B
MOV. B
MOV. B
#0
#80,
R0L,
R0L,
@RAM0, R0L
R0L,
P3
Low level High level Low level Low level Low level Low level Low level Low level
0
1
1
P3
Low level High level Low level Low level Low level Low level Low level High level
0
1
1
7
7
,
R0L
@RAM0
@PDR3
@RAM0
@PDR3
P3
Input
0
0
0
P3
Input
0
0
0
6
6
P3
Output
1
0
0
P3
Output
1
0
0
The PDR3 value (H'80) is written to a work area in memory
(RAM0) as well as to PDR3
The BSET instruction is executed designating the PDR3
work area (RAM0).
The work area (RAM0) value is written to PDR3.
5
5
P3
Output
1
0
0
P3
Output
1
0
0
4
4
P3
Output
1
0
0
P3
Output
1
0
0
3
3
P3
Output
1
0
0
P3
Output
1
0
0
2
2
P3
Output
1
0
0
P3
Output
1
0
0
1
1
P3
Output
1
0
0
P3
Output
1
1
1
0
0