H8SSLASH2218 datasheet(399/750 Pages) RENESAS

399 / 750 page

Section 11 Realtime Clock (RTC)

Rev.6.00 Jun. 03, 2008 Page 351 of 698

REJ09B0074-0600

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.

Note: * Initial value after

RES.

11.3.2

Minute Data Register (RMINDR)

RMINDR counts the BCD-coded minute value on the carry generated once per minute by the

RSECDR counting. This register is initialized to H'00 a

STBY input or the RST bit in RTCCR1,

but not initialized by a

RES input. The setting range is decimal 00 to 59.

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.

MN12

MN11

MN10

—

R/W

Counting Ten’s Position of Minutes

Counts on 0 to 5 for 60-minute counting.

MN03

MN02

MN01

MN00

—

R/W

Counting One’s Position of Minutes

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

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

Note: * Initial value after

RES.

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