upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 427

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

CHAPTER 16 FLASH MEMORY
(5) Internal manipulation setup parameter
µ
If the self-programming mode is switched to the normal operation mode, the V850/SA1 must wait for 100
s
before it accesses the flash memory. In the program example in (4) above, the elapse of this wait time is ensured
by setting ISETUP to “52” (@ 20 MHz operation). The total number of execution clocks in this example is 39
clocks (divh instruction (35 clocks) + add instruction (1 clock) + jne instruction (3 clocks)). Ensure that a wait time
µ
of 100
s elapses by using the following expression.
µ
39 clocks (total number of execution clocks) × 50 ns (@ 20 MHz operation) × 52 (ISETUP) = 101.4
s (wait time)
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User’s Manual U12768EJ4V1UD