H8SSLASH2218 datasheet(401/750 Pages) RENESAS

部件名	H8S/2218

功能描述	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	750 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

标志

401 / 750 page

Section 11 Realtime Clock (RTC)

Rev.6.00 Jun. 03, 2008 Page 353 of 698

REJ09B0074-0600

11.3.4

Day-of-Week Data Register (RWKDR)

RWKDR counts the BCD-coded day-of-week value on the carry generated once per day by

RHRDR. 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 decimal 0 to 6 using bits WK2 to WK0.

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.

6 to

—

All 0

—

Reserved

These bits are always read as 0.

WK2

WK1

WK0

—

R/W

Day-of-Week Counting

Day-of-week is indicated with a binary code.

000: Sunday

001: Monday

010: Tuesday

011: Wednesday

100: Thursday

101: Friday

110: Saturday

111: Reserved (Setting prohibited)

Note: * Initial value after

RES.

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