HD64F36049 datasheet(183/562 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 10 Realtime Clock (RTC)

Rev. 3.00 Mar. 15, 2006 Page 151 of 526

REJ09B0060-0300

10.3.3

Hour Data Register (RHRDR)

RHRDR counts the BCD-coded hour value on the carry generated once per hour by RMINDR.

The setting range is either decimal 00 to 11 or 00 to 23 by the selection of the 12/24 bit in

RTCCR1.

Bit

Bit Name

Initial

Value

R/W

Description

BSY

—

RTC Busy

This bit is set to 1 when the RTC is updating (operating)

the values of second, minute, hour, and day-of-week

data registers. When this bit is 0, the values of second,

minute, hour, and day-of-week data registers must be

adopted.

—

Reserved

This bit is always read as 0.

HR11

HR10

—

R/W

Counting Ten's Position of Hours

Counts on 0 to 2 for ten's position of hours.

HR03

HR02

HR01

HR00

—

R/W

Counting One's Position of Hours

Counts on 0 to 9 once per hour. When a carry is

generated, 1 is added to the ten's position.

HD64F36049 Datasheet(PDF) 183 Page - Renesas Technology Corp