upd78f0134hgka1-9et-a Renesas Electronics Corporation., upd78f0134hgka1-9et-a Datasheet - Page 518
upd78f0134hgka1-9et-a
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upd78f0134hgka1-9et-a
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
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33.1 Cautions for Wait
may be passed if an access to the CPU conflicts with an access to the peripheral hardware.
processing, until the correct data is passed.
execution clocks of an instruction increases by the number of wait clocks (for the number of wait clocks, refer to Table
33-1). This must be noted when real-time processing is performed.
518
This product has two internal system buses.
One is a CPU bus and the other is a peripheral bus that interfaces with the low-speed peripheral hardware.
Because the clock of the CPU bus and the clock of the peripheral bus are asynchronous, unexpected illegal data
When accessing the peripheral hardware that may cause a conflict, therefore, the CPU repeatedly executes
As a result, the CPU does not start the next instruction processing but waits. If this happens, the number of
CHAPTER 33 CAUTIONS FOR WAIT
User’s Manual U16899EJ3V0UD
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