R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 838

• Manufacturer Part Number: R5S77631Y266BGV
• Description: IC SUPERH MPU ROMLESS 499BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R5S77631Y266BGV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: Audio Codec, I²C, MMC, SCI, SIM, SIO, SSI, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 107
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 499-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 22 Realtime Clock (RTC)
22.4.5
RWKCNT is an 8-bit readable/writable register used as a counter for setting and counting the
BCD-coded day-of-week value in the RTC. It counts on the carry generated once per day by the
hour counter.
The setting range is decimal 0 to 6. 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.
RWKCNT is not initialized by a power-on or manual reset.
Bits 7 to 3 are always read as 0. A write to these bits is invalid, but the write value should always
be 0.
Rev. 2.00 May 22, 2009 Page 768 of 1982
REJ09B0256-0200
Day-of-week code
Day of week
Day-of-Week Counter (RWKCNT)
Initial value:
0
Sun
R/W:
Bit:
—
R
7
0
1
Mon
—
R
6
0
—
R
5
0
2
Tue
—
R
4
0
—
R
3
0
3
Wed
R/W
Day-of-week code
—
2
R/W
—
4
Thu
1
R/W
—
0
5
Fri
6
Sat