7480 datasheet(88/337 Pages) RENESAS

Il numero della parte	7480

Spiegazioni elettronici	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	337 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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1-71

1.12 Timer X and Timer Y

HARDWARE

7480 Group and 7481 Group User's Manual

Figure 1.12.11 Operation Example in Pulse Output Mode

Count source

000016

Timer X stop

control bit

CNTR0 pin output

‘0’ is

written

‘0’ is

written

‘1’ is

written

Time

Count start

Count stop

Count start

Timer X interrupt

request bit

Writing to timer

X (Note 2)

Notes 1: In this case, timer X write control bit is ‘0’ (writing to timer and timer latch simultaneously).

2: In this case, timer X write control bit is ‘1’ (writing to only timer latch).

: Setting value to timer X

: Contents of timer latch is reloaded

: Underflow

: Pulse width

: Clearing by writing ‘0’ to interrupt request bit or accepting interrupt request

H(s) =

Count source frequency ×

(Setting value to timer X + 1)

CNTR0 edge

selection bit

‘1’ is

written

Writing to timer

X (Note 1)

Undefined

Initialized when

writing to timer X

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