uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM
uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM
uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM
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86<br />
Count clock<br />
TM8n count value<br />
CR8n<br />
TCE8n<br />
INTTM8n<br />
t<br />
00 01<br />
Count starts<br />
CHAPTER 7 8-BIT TIMER<br />
Figure 7-5. Interval Timer Operation Timing<br />
Clear Clear<br />
Caution An error of up to 1 clock may occur in the period until the match signal is generated after<br />
the timer starts.<br />
This is because 8-bit timer counter 8n (TM8n) starts operation asynchronously with the count<br />
pulse.<br />
Remarks 1. Interval time = (N + 1) × t where N = 00H to FFH<br />
2. n = 0 or 1<br />
N<br />
00<br />
01<br />
N N N N<br />
Interrupt acknowledged Interrupt acknowledged<br />
Interval time Interval time Interval time<br />
Preliminary User’s Manual U14938EJ1V0UM<br />
N<br />
00<br />
01<br />
N
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