HD404339 Datasheet, PDF (47/78 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

HD404339 Series
T × (N + 1)
TMC3 = 0
(Free-running
timer)
TMC3 = 1
(Reload timer)
T × 256
T
T × (256 – N)
Notes: T: Input clock period supplied to counter.
(The clock source and system clock division ratio are determined by timer mode register C.)
N: Value of timer write register C. (When N = 255 ($FF), PWM output is fixed low.)
Figure 36 PWM Output Waveform
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