Section 6 User Break Controller (UBC)
Rev. 2.00 Mar 09, 2006 page 237 of 906
REJ09B0292-0200
6.3.2
Instruction Fetch Cycle Break
1. If a CPU/instruction fetch/read/word setting is made in the break bus cycle register (BBRA,
BBRB, BBRC, or BBRD), a CPU instruction fetch cycle can be selected as a break condition.
In this case, it is possible to specify whether the break is to be effected before or after
execution of the relevant instruction by means of the PCBA/PCBB/PCBC/PCBD bit in the
break control register (BRCR).
2. In the case of an instruction for which pre-execution is set as the break condition, the break is
performed when it has been confirmed that the instruction has been fetched and is to be
executed. Consequently, a break cannot be set for an overrun-fetched instruction (an
instruction fetched but not executed in the event of a branch or interrupt transition). If a break
is set for the delay slot of a delayed branch instruction, or for the instruction following an
instruction for which interrupts are prohibited, such as LCD, an interrupt is generated before
execution of the next instruction at which interrupts are accepted.
3. With the post-execution condition, an interrupt is generated after execution of the instruction
set as the break condition, and before execution of the following instruction. As in 2 above, a
break cannot be set for an overrun-fetched instruction. If a break is set for a delayed branch
instruction, or for an instruction for which interrupts are prohibited, such as LCD, an interrupt
is generated before execution of the next instruction at which interrupts are accepted.
4. When an instruction fetch cycle is set for channel C or D, break data register C (BDRC) or
break data register D (BDRD) is ignored. Therefore, break data need not be set for an
instruction fetch cycle break.
5. When an instruction fetch cycle is set, the start address at which that instruction is located
should be set for the break. A break will not occur if a different address is set. Also, a break
will not occur if the address of the lower word of a 32-bit instruction is set.
Summary of Contents for SH7616
Page 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Page 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Page 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Page 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Page 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Page 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Page 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Page 935: ...SH7616 Hardware Manual ...