NEC 78K0 User Manual page 188

CHAPTER 8 8-BIT TIMERS H0 AND H1
Figure 8-10. Timing of Interval Timer/Square-Wave Output Operation (2/2)
(b) Operation when CMP0n = FFH
Count clock
Count start
00H 01H FEH FFH 00H FEH FFH 00H
8-bit timer counter Hn
Clear
Clear
FFH
CMP0n
TMHEn
INTTMHn
TOHn
Interval time
(c) Operation when CMP0n = 00H
Count clock
Count start
8-bit timer counter Hn 00H
00H
CMP0n
TMHEn
INTTMHn
TOHn
Interval time
Remark n = 0, 1
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