M38263EBFS datasheet(81/91 Pages) RENESAS

tên linh kiện	M38263EBFS

Giải thích chi tiết về linh kiện	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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81 / 91 page

Rev.1.00

Sep 06, 2006

page 81 of 88

REJ03B0181-0100

3826 Group (One Time PROM version)

3.3.8 Notes on PWM output circuit

●“L” level output before starting PWM output

When at least one of two is set to “1” when both the PWM0 function enable bit and the PWM1 function

enable bit are “0”, “L” level is output from the corresponding PWM pin during the period shown below.

Then, PWM output is started from “H” level.

•Count source selection bit = “0”, where n is the value set in the prescaler

sec.

•Count source selection bit = “1”, where n is the value set in the prescaler

sec.

n + 1

2 • f(XIN)

n + 1

f(XIN)

●Change of PWM output

When the PWM prescaler and the PWM register are changed during PWM output, the PWM waveforms

corresponding to updated data will be output from the next repetitive cycle. Figure 3.3.8 shows the

change of PWM output.

Fig. 3.3.8 Change of PWM output

PWM output

Changes PWM prescaler

and PWM register

From the next repetitive cycle,

output modified waveform

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