R5S72011 RENESAS [Renesas Technology Corp], R5S72011 Datasheet - Page 203

• Manufacturer Part Number: R5S72011
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

7.4.3
1. If the C bus is specified as a break condition for data access break, condition comparison is
2. The relationship between the data access cycle address and the comparison condition for each
Table 7.3
3. When the data value is included in the break conditions:
4. Access by a PREF instruction is handled as read access in longword units without access data.
5. If the data access cycle is selected, the instruction at which the break will occur cannot be
Access Size
Longword
Word
Byte
performed for the logical addresses (and data) accessed by the executed instructions, and a
break occurs if the condition is satisfied. If the I bus is specified as a break condition, condition
comparison is performed for the addresses (and data) of the data access cycles on the bus
specified by the I bus select bits, and a break occurs if the condition is satisfied. For details on
the CPU bus cycles issued on the I bus, see 6 in section 7.4.1, Flow of the User Break
Operation.
operand size is listed in table 7.3.
This means that when address H'00001003 is set in the break address register (BAR), for
example, the bus cycle in which the break condition is satisfied is as follows (where other
conditions are met).
Longword access at H'00001000
Word access at H'00001002
Byte access at H'00001003
When the data value is included in the break conditions, either longword, word, or byte is
specified as the operand size in the break bus cycle register (BBR). When data values are
included in break conditions, a break is generated when the address conditions and data
conditions both match. To specify byte data for this case, set the same data in the four bytes at
bits 31 to 24, 23 to 16, 15 to 8, and 7 to 0 of the break data register (BDR) and break data mask
register (BDMR). To specify word data for this case, set the same data in the two words at bits
31 to 16 and 15 to 0.
Therefore, if including the value of the data bus when a PREF instruction is specified as a
break condition, a break will not occur.
determined.
Break on Data Access Cycle
Data Access Cycle Addresses and Operand Size Comparison Conditions
Address Compared
Compares break address register bits 31 to 2 to address bus bits 31 to 2
Compares break address register bits 31 to 1 to address bus bits 31 to 1
Compares break address register bits 31 to 0 to address bus bits 31 to 0
Rev. 2.00 Sep. 07, 2007 Page 175 of 1164
Section 7 User Break Controller (UBC)
REJ09B0321-0200