Datasheet

Section 11 Realtime Clock (RTC)
Rev.7.00 Dec. 24, 2008 Page 351 of 698
REJ09B0074-0700
Bit Bit Name Initial Value* R/W Description
7 BSY — R 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
5
4
SC12
SC11
SC10
—
—
—
R/W
R/W
R/W
Counting Ten’s Position of Seconds
Counts on 0 to 5 for 60-second counting.
3
2
1
0
SC03
SC02
SC01
SC00
—
—
—
—
R/W
R/W
R/W
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
7 BSY — R 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
5
4
MN12
MN11
MN10
—
—
—
R/W
R/W
R/W
Counting Ten’s Position of Minutes
Counts on 0 to 5 for 60-minute counting.
3
2
1
0
MN03
MN02
MN01
MN00
—
—
—
—
R/W
R/W
R/W
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.