7516 datasheet(41/90 Pages) RENESAS

tên linh kiện	7516

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

PDF	90 Pages

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nhà sản xuất	RENESAS [Renesas Technology Corp]

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41 / 90 page

Rev.1.01

Jul 01, 2003

page 41 of 89

7516 Group

Fig. 42 Structure of PWM control register

Fig. 43 PWM output timing when PWM register or PWM prescaler is changed

sNote

The PWM starts after the PWM function enable bit is set to enable and “L” level is output from the PWM pin.

The length of this “L” level output is as follows:

sec

(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)

n+1

2 • f(XIN)

n+1

f(XIN)

PWM control register

(PWMCON : address 001D16)

PWM function enable bit

Count source selection bit

Not used (return “0” when read)

0: PWM disabled

1: PWM enabled

0: f(XIN) (f(XCIN) at low-speed mode)

1: f(XIN)/2 (f(XCIN)/2 at low-speed mode)

PWM output

PWM register

write signal

PWM prescaler

write signal

(Changes “H” term from “A” to “B”.)

(Changes PWM period from “T” to “T2”.)

When the contents of the PWM register or PWM prescaler have changed, the PWM

output will change from the next period after the change.

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