SH7751 Datasheet, PDF (307/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

7. Instruction Set
4xIck is four or eight, respectively. Therefore, the affected codes are those occurring in
“the four words (or eight words) of data following the instruction.”
Workarounds
1. To prevent the problem, use either of workarounds a. or b. below.
a. Include a NOP instruction in the eight words of data following each TRAPA instruction,
SLEEP instruction, or undefined instruction code H'FFFD.
b. Include an OR R0,R0 instruction in the five words of data following each TRAPA
instruction, SLEEP instruction, or undefined instruction code H'FFFD. This workaround
also applies to cases where “the eight words of data following the … instruction … contain
H'Fxxx,” as mentioned in condition 4. b., because two OR instructions are never executed
simultaneously, so a minimum of 5xIck is required for execution.
Rev.4.00 Oct. 10, 2008 Page 209 of 1122
REJ09B0370-0400