h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 156
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 156 of 1165
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Section 6 PC Break Controller (PBC)
6.2.2
BARB is the channel B break address register. The bit configuration is the same as for BARA.
6.2.3
BCRA is an 8-bit readable/writable register that controls channel A PC breaks. BCRA (1) selects
the break condition bus master, (2) specifies bits subject to address comparison masking, and (3)
specifies whether the break condition is applied to an instruction fetch or a data access. It also
contains a condition match flag.
BCRA is initialized to H'00 by a reset and in hardware standby mode.
Bit 7—Condition Match Flag A (CMFA): Set to 1 when a break condition set for channel A is
satisfied. This flag is not cleared to 0.
Bit 6—CPU Cycle/DTC Cycle Select A (CDA): Selects the channel A break condition bus
master.
Rev. 5.00 Sep 22, 2005 page 130 of 1136
REJ09B0257-0500
Bit 7
CMFA
0
1
Bit 6
CDA
0
1
Bit
Initial value
Read/Write
Note: * Only a 0 may be written to this bit to clear the flag.
Break Address Register B (BARB)
Break Control Register A (BCRA)
Description
[Clearing condition]
When 0 is written to CMFA after reading CMFA = 1
[Setting condition]
When a condition set for channel A is satisfied
Description
PC break is performed when CPU is bus master
PC break is performed when CPU or DTC is bus master
R/(W) *
CMFA
0
7
CDA
R/W
6
0
BAMRA2
R/W
0
5
BAMRA1
R/W
4
0
BAMRA0
R/W
3
0
CSELA1
R/W
2
0
CSELA0
R/W
1
0
(Initial value)
(Initial value)
BIEA
R/W
0
0
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