HD64F36049 datasheet(324/562 Pages) RENESAS

Part #	HD64F36049

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series

PDF	562 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 15 Watchdog Timer

Rev. 3.00 Mar. 15, 2006 Page 292 of 526

REJ09B0060-0300

15.2.2

Timer Counter WD (TCWD)

TCWD is an 8-bit readable/writable up-counter. When TCWD overflows from H'FF to H'00, the

internal reset signal is generated and the WRST bit in TCSRWD is set to 1. TCWD is initialized to

H'00.

15.2.3

Timer Mode Register WD (TMWD)

TMWD selects the input clock.

Bit

Bit Name

Initial

Value

R/W

Description

7 to 4



All 1



Reserved

These bits are always read as 1.

CKS3

CKS2

CKS1

CKS0

R/W

Clock Select 3 to 0

Select the clock to be input to TCWD.

1000: Internal clock: counts on

φ/64

1001: Internal clock: counts on

φ/128

1010: Internal clock: counts on

φ/256

1011: Internal clock: counts on

φ/512

1100: Internal clock: counts on

φ/1024

1101: Internal clock: counts on

φ/2048

1110: Internal clock: counts on

φ/4096

1111: Internal clock: counts on

φ/8192

0xxx: Internal oscillator

For the internal oscillator overflow periods, see section

23, Electrical Characteristics.

[Legend]

x: Don't care.

HD64F36049 Datasheet(PDF) 324 Page - Renesas Technology Corp

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