R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 848

• 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)
Rev. 2.00 May 22, 2009 Page 778 of 1982
REJ09B0256-0200
Bit
2
1
0
Bit Name
ADJ
RESET
START
Initial
Value
0
0
1
R/W
R/W
R/W
R/W
Description
30-Second Adjustment
Used for 30-second adjustment. When 1 is written to
this bit, a value up to 29 seconds is rounded down to 00
seconds, and a value of 30 seconds or more is rounded
up to 1 minute. The frequency divider circuits (RTC
prescaler and R64CNT) are also reset at this time. This
bit always returns 0 if read.
0: Normal clock operation
1: 30-second adjustment performed
Reset
The frequency divider circuits are initialized by writing 1
to this bit. When 1 is written to the RESET bit, the
frequency divider circuits (RTC prescaler and R64CNT)
are reset and the RESET bit is automatically cleared to
0 (i.e. does not need to be written with 0).
0: Normal clock operation
1: Frequency divider circuits are reset
Start Bit
Stops and restarts counter (clock) operation.
0: Second, minute, hour, day, day-of-week, month, and
1: Second, minute, hour, day, day-of-week, month, and
Note: * The 64 Hz counter continues to operate unless
year counters are stopped*
year counters operate normally*
stopped by means of the RTCEN bit.