UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 247
UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
- Current page: 247 of 759
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Remark ALV0 = 0
Caution If the PPG cycle is extremely short as compared with the time required to acknowledge an interrupt, the
If a value equal to or less than the TM0 value is written to CR00 before the CR00 and TM0 match, the duty of the PPG cycle
will be 100 %. CR00 rewriting should be performed by the interrupt due to a match between TM0 and CR00.
TM0
Count Value
CR00
value of CR00 cannot be rewritten by interrupt processing that is performed due to a match between TM0
and CR00. Use another method (for example, to poll the interrupt request flags in software with all the
interrupts masked).
TO0
0H
CR01
Figure 8-26 Example of 100 % Duty With PPG Output
n1
CHAPTER 8 TIMER/COUNTER 0
n1
CR01
n2
n3
When value n2 which is smaller than the TM0 value n3
is written to CR00 here, the duty of this period will be 100 %.
n1
CR01
n2
n2
CR01
n2
207
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