H838532H datasheet(269/508 Pages) RENESAS

No. de pieza	H838532H

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

PDF	508 Pages

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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269 / 508 page

Section 9 Timers

Rev. 1.00 May 30, 2008 Page 249 of 484

REJ09B0436-0100

(4) Timer Mode Register G (TMG)

OVFH

CCLR0

CKS1

CKS0

OVFL

OVIE

IIEGS

CCLR1

543210

0000000

R/W*

R/W

R/W*

R/W

Bit:

Initial value:

Read/Write:

Note: * Bits 7 and 6 can only be written with 0, for flag clearing.

TMG is an 8-bit read/write register that performs TCG clock selection from four internal clock

sources, counter clear selection, and edge selection for the input capture input signal interrupt

request, controls enabling of overflow interrupt requests, and also contains the overflow flags.

TMG is initialized to H'00 upon reset.

Bit 7: Timer overflow flag H (OVFH)

Bit 7 is a status flag indicating that TCG has overflowed from H'FF to H'00 when the input capture

input signal is high. This flag is set by hardware and cleared by software. It cannot be set by

software.

Bit 7

OVFH

Description

Clearing condition:

(initial value)

After reading OVFH = 1, cleared by writing 0 to OVFH

Setting condition:

Set when TCG overflows from H'FF to H'00

H838532H Datasheet(PDF) 269 Page - Renesas Technology Corp