HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 211

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

• User break after instruction execution
Table 4.4
CPU Address Error in Repeat Control Period: If a CPU address error occurs in the repeat
control period, the exception is accepted but an exception code (H'070) indicating the repeat loop
period is specified in the EXPEVT. If a CPU address error occurs in instructions following a
repeat detection instruction to repeat end instruction, an exception code for instruction access or
data access is specified in the EXPEVT.
The SPC is saved according to the description in section 4.4.3, SPC Saved by an Exception in
Repeat Control Period.
After the CPU address error exception processing, the repeat control cannot be returned correctly.
To execute a repeat loop correctly, care must be taken not to generate a CPU address error in the
repeat control period.
Note: In a repeat loop consisting of one to three instructions, some restrictions apply to repeat
Exception Type
Interrupt
DMA address error
User break before instruction execution
User break after instruction execution
A user break after instruction execution cannot be accepted at instructions [B] and [C] but the
exception request is retained until an instruction [A] or [B] is executed the next time. Then,
the exception request is accepted before an instruction [A] or [B] is executed. In this case, an
address of instruction [A] or [B] is saved in the SPC.
detection instructions and all the remaining instructions. In a repeat loop consisting of
four or more instructions, restrictions apply to only the three instructions that include a
repeat end instruction. The restriction occurs when SR.RC[11:0] ≥ 1.
Restrictions of Exception Acceptance in the Repeat Loop
Instruction [B]
Not accepted
Not accepted
Accepted
Not accepted
Rev. 1.00, 02/04, page 173 of 804
Instruction [C]
Not accepted
Not accepted
Not accepted
Not accepted