H838532H datasheet(264/508 Pages) RENESAS

No de pièce	H838532H

Description	16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series

PDF	508 Pages

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Fabricant	RENESAS [Renesas Technology Corp]

Site Internet	http://www.renesas.com

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264 / 508 page

Section 9 Timers

Rev. 1.00 May 30, 2008 Page 244 of 484

REJ09B0436-0100

Program process

φw

Interrupt request flag

(IRRTFH, IRRTFL)

Interrupt factor

generation signal

(Internal signal,

nega-active)

Overflow signal,

Compare match signal

(Internal signal,

nega-active)

Interrupt

Normal

Interrupt request

flag clear

Interrupt request

flag clear

(1)

(2)

Figure 9.7 Clear Interrupt Request Flag when Interrupt Factor Generation Signal is Valid

(4) Timer Counter (TCF) Read/Write

When

φw/4 is selected as the internal clock in active (high-speed, medium-speed) mode, write on

TCF is impossible. And, when read TCF, as the system clock and internal clock are mutually

asynchronous, TCF synchronizes with synchronization circuit. This results in a maximum TCF

read value error of

±1.

When read/write TCF in active (high-speed, medium-speed) mode is needed, please select internal

clock except for

φw/4 before read/write.

In subactive mode, even

φw/4 is selected as the internal clock, normal read/write TCF is possible.

H838532H Fiches technique(PDF) 264 Page - Renesas Technology Corp