Section 20 Realtime Clock (RTC)
Rev.1.00 Dec. 13, 2005 Page 719 of 1286
REJ09B0158-0100
Bits 6 to 3 are always read as 0. A write to these bits is invalid, but the write value should always
be 0.
0
1
2
3
4
5
6
7
—
—
—
0
0
0
0
0
Day-of-week code
—
—
—
—
ENB
R/W
R/W
R/W
R
R
R
R
R/W
BIt:
Initial value:
R/W:
Day-of-week
code
0 1 2 3 4 5 6
Day of week
Sun
Mon
Tue
Wed
Thu
Fri
Sat
20.3.13 Day Alarm Register (RDAYAR)
RDAYAR is an 8-bit readable/writable register used as an alarm register for the RTC's BCD-
coded day value counter, RDAYCNT. When the ENB bit is set to 1, the RDAYAR value is
compared with the RDAYCNT value. Comparison between the counter and the alarm register is
performed for those registers among RSECAR, RMINAR, RHRAR, RWKAR, RDAYAR, and
RMONAR in which the ENB bit is set to 1, and the RCR1 alarm flag is set when the respective
values all match.
The setting range is decimal 01 to 31 + ENB bit. The RTC will not operate normally if any other
value is set. The setting range for RDAYAR depends on the month and whether the year is a leap
year, so care is required when making the setting.
The ENB bit in RDAYAR is initialized by a power-on reset. The other fields in RDAYAR are not
initialized by a power-on or manual reset.
Bit 6 is always read as 0. A write to this bit is invalid, but the write value should always be 0.
0
1
2
3
4
5
6
7
—
—
—
—
—
—
0
0
1-day units
10-day units
—
ENB
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W
BIt:
Initial value:
R/W:
Summary of Contents for SH7780 Series
Page 2: ...Rev 1 00 Dec 13 2005 Page ii of l ...
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Page 50: ...Rev 1 00 Dec 13 2005 Page l of l ...
Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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