HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 398

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

11. Realtime Clock (RTC)
Day-of-week code
Day of week
11.2.6
RDAYCNT is an 8-bit readable/writable register used as a counter for setting and counting the
BCD-coded day value in the RTC. It counts on the carry generated once per day by the hour
counter.
The setting range is decimal 01 to 31. The RTC will not operate normally if any other value is set.
Write processing should be performed after stopping the count with the START bit in RCR2, or
by using the carry flag.
RDAYCNT is not initialized by a power-on or manual reset, or in standby mode.
The setting range for RDAYCNT depends on the month and whether the year is a leap year, so
care is required when making the setting. Taking the year counter (RYRCNT) value as the year,
leap year calculation is performed according to whether or not the value is divisible by 400, 100,
and 4.
Bits 7 and 6 are always read as 0. A write to these bits is invalid, but the write value should always
be 0.
11.2.7
RMONCNT is an 8-bit readable/writable register used as a counter for setting and counting the
BCD-coded month value in the RTC. It counts on the carry generated once per month by the day
counter.
The setting range is decimal 01 to 12. The RTC will not operate normally if any other value is set.
Write processing should be performed after stopping the count with the START bit in RCR2, or
by using the carry flag.
RMONCNT is not initialized by a power-on or manual reset, or in standby mode.
Rev.4.00 Oct. 10, 2008 Page 298 of 1122
REJ09B0370-0400
Initial value:
R/W:
Day Counter (RDAYCNT)
Month Counter (RMONCNT)
Bit:
—
R
7
0
0
Sun
—
R
6
0
1
Mon
Undefined Undefined Undefined Undefined Undefined Undefined
R/W
10-day units
5
2
Tue
R/W
4
3
Wed
R/W
3
4
Thu
R/W
2
1-day units
5
Fri
R/W
1
6
Sat
R/W
0