HD6417709SF133B Renesas Electronics America, HD6417709SF133B Datasheet - Page 470

• Manufacturer Part Number: HD6417709SF133B
• Description: IC SUPERH MPU ROMLESS 208LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417709SF133B

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 96
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 2.05 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

13.3.4
Figure 13.4 shows how to use the alarm function.
Alarms can be generated using seconds, minutes, hours, day of the week, date, month, or any
combination of these. Set the ENB bit (bit 7) to 1 in the register to which the alarm applies, and
then set the alarm time in the lower bits. Clear the ENB bit to 0 in registers to which the alarm
does not apply.
When the clock and alarm times match, 1 is set in the AF bit (bit 0) in RCR1. Alarm detection can
be checked by reading this bit, but normally it is done by interrupt. If 1 is placed in the AIE bit (bit
3) in RCR1, an interrupt is generated when an alarm occurs.
Rev. 5.00, 09/03, page 424 of 760
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 13.4 Using the Alarm Function
Disable interrupts for preventing error
interrupts (clear the AIE bit in RCR1 to 0).
Then write 1 to the AIE bit in RCR1.
Always reset, since the flag may have
been set while the alarm time was being
set (clear the AF bit in RCR1 to 0).