HD64F36049 datasheet(181/562 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 149 of 526

REJ09B0060-0300

10.3.1

Second Data Register/Free Running Counter Data Register (RSECDR)

RSECDR counts the BCD-coded second value. The setting range is decimal 00 to 59. It is an 8-bit

read register used as a counter, when it operates as a free running counter. For more information

on reading seconds, minutes, hours, and day-of-week, see section 10.4.3, Data Reading Procedure.

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.

SC12

SC11

SC10

—

R/W

Counting Ten's Position of Seconds

Counts on 0 to 5 for 60-second counting.

SC03

SC02

SC01

SC00

—

R/W

Counting One's Position of Seconds

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

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

HD64F36049 Datasheet(PDF) 181 Page - Renesas Technology Corp