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R01UH0336EJ0102 Rev.1.02
Page 320 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 9 Safety Functions
Caution
After executing the instruction to write to this register, the completion of actual
writing takes time. Ensure an interval of at least 6 cycles of the PLL input clock
between consecutive rounds of writing to this register.
Example: When heapclk is running at 80 MHz, ensure an interval of at least 60
cycles of heapclk.
When the interval is shorter than this cycle, the register will not reflect the
second value. For reading after writing, ensure an interval of 3 cycles of the
PLL input clock.
Example: When heapclk is running at 80 MHz, ensure an interval of at least 30
cycles of heapclk.