HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 571

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

15.4.4
Figure 15.4 shows how to use the alarm function.
Alarms can be generated using seconds, minutes, hours, day of the week, date, month, year, or any
combination of these. Set the ENB bit or YAEN bit in the register on which the alarm is placed to
1, and then set the alarm time in the lower bits. Clear the ENB bit in the register on which the
alarm is not placed to 0.
When the clock and alarm times match, 1 is set in the AF bit in RCR1. Alarm detection can be
checked by reading this bit, but normally it is done by interrupt. If 1 is set in the AIE bit in RCR1,
an interrupt is generated when an alarm occurs.
Alarm Function
(wait for interrupt or
Set whether to use
Monitor alarm time
check alarm flag)
Clear alarm flag
alarm interrupt
Set alarm time
Clock running
Figure 15.4 Using Alarm Function
Disable interrupt to prevent errorneous
interruption.(AIE bit in RCR1 is cleared)
Then write 1.
Always clear, since the flag may have been
set while the alarm time was being set.
(Write 0 to AF of RCR1 to clear it. )
Rev. 1.00 Dec. 27, 2005 Page 527 of 932
Section 15 Realtime Clock (RTC)
REJ09B0269-0100