HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 202

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Break Condition Specified to a DMAC Data Access Cycle
1. Register specifications:
7.4
1. Only CPU can read/write UBC registers.
2. UBC cannot monitor CPU and DMAC access in the same channel.
3. Notes in specification of sequential break are described below:
Rev. 4.00, 03/04, page 156 of 660
On channel A, a user break occurs with ASID = H'80 during longword read to address
H'00123454, word read to address H'00123456, or byte read to address H'00123456. On
channel B, a user break occurs with ASID = H'70 when word H'A512 is written in addresses
H'000ABC00 to H'000ABCFE.
BARA = H'00314156, BAMRA = H'00000000, BBRA = H'0094, BARB = H'00055555,
BAMRB = H'00000000, BBRB = H'00A9, BDRB = H'00000078, BDMRB = H'0000000F,
BRCR = H'00000080, BASRA = H'80, BASRB = H'70
Specified conditions: Channel A/channel B independent mode
•
•
On channel A, no user break occurs since instruction fetch is not performed in DMAC cycles.
On channel B, a user break occurs with ASID = H'70 when the DMAC writes byte H'7* in
address H'00055555.
A. A condition match occurs when a channel B match occurs in a bus cycle after a channel A
B. Since the CPU has a pipeline configuration, the pipeline determines the order of an
C. When the bus cycle condition for channel A is specified as a break before execution
Data:
Bus cycle: CPU/data access/write/word
Address:
Bus cycle: DMAC/instruction fetch/read (operand size is not included in the condition)
Address:
Data:
Bus cycle: DMAC/data access/write/byte
match occurs in another bus cycle in sequential break setting. Therefore, no condition
match occurs even if a bus cycle, in which a channel A match and a channel B match occur
simultaneously, is set.
instruction fetch cycle and a memory cycle. Therefore, when a channel condition matches
in the order of bus cycles, a sequential condition is satisfied.
(PCBA = 0 in BRCR) and an instruction fetch cycle (in BBRA), the attention is as follows.
A break is issued and condition match flags in BRCR are set to 1, when the bus cycle
conditions both for channels A and B match simultaneously.
Channel A
Channel B
Usage Note
H'0000A512, Data mask: H'00000000
H'00314156, Address mask: H'00000000, ASID: H'80
H'00055555, Address mask: H'00000000, ASID: H'70
H'00000078, Data mask: H'0000000F