H8SSLASH2218 datasheet(400/750 Pages) RENESAS

Il numero della parte	H8S/2218

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	750 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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Section 11 Realtime Clock (RTC)

Rev.6.00 Jun. 03, 2008 Page 352 of 698

REJ09B0074-0600

11.3.3

Hour Data Register (RHRDR)

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

This register is initialized to H'00 by a

STBY input or the RST bit in RTCCR1, but not initialized

by a

RES input. The setting range is either decimal 0 to 11 or 0 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.

Note: * Initial value after

RES.

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