R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 852

• 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)
22.5.3
The use of the alarm function is illustrated in figure 22.4.
An alarm can be generated by the second, minute, hour, day-of-week, day, month, or year value,
or a combination of these. Write 1 to the ENB bit in the alarm registers involved in the alarm
setting, and set the alarm time in the lower bits. Write 0 to the ENB bit in registers not involved in
the alarm setting.
When the counter and the alarm time match, RCR1.AF is set to 1. Alarm detection can be
confirmed by reading this bit, but normally an interrupt is used. If 1 has been written to
RCR1.AIE, an alarm interrupt is generated in the event of alarm, enabling the alarm to be
detected.
Rev. 2.00 May 22, 2009 Page 782 of 1982
REJ09B0256-0200
Alarm Function
(Wait for interrupt or check alarm flag)
Disable alarm interrupts
Enable alarm interrupts
Monitor alarm time
Clear alarm flag
Set alarm time
Figure 22.4 Example of Use of Alarm Function
Clock running
Clear RCR1.AIE to prevent erroneous interrupts.
Be sure to reset the flag as it may have been
set during alarm time setting.
Set RCR1.AIE to 1.