HD6417708RF100A Renesas Electronics America, HD6417708RF100A Datasheet - Page 356
HD6417708RF100A
Manufacturer Part Number
HD6417708RF100A
Description
IC SUPERH MPU ROMLESS 144LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417708SF60V.pdf
(635 pages)
Specifications of HD6417708RF100A
Core Processor
SH-2
Core Size
32-Bit
Speed
100MHz
Connectivity
EBI/EMI, SCI, SmartCard
Peripherals
POR, WDT
Number Of I /o
8
Program Memory Type
ROMless
Voltage - Supply (vcc/vdd)
3.15 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Ram Size
-
Program Memory Size
-
Data Converters
-
Available stocks
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Quantity
Price
Company:
Part Number:
HD6417708RF100A
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD6417708RF100A
Manufacturer:
HITACHI/日立
Quantity:
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Part Number:
HD6417708RF100AV
Manufacturer:
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Quantity:
20 000
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12.3.4
Figure 12.4 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) 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
placed to 0.
When the clock and alarm times match, a 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.
336
Alarm Function
Clear alarm interrupt
(wait for interrupt or
Monitor alarm time
Set alarm interrupt
check alarm flag)
Clear alarm flag
Set alarm time
Clock running
Figure 12.4 Using the Alarm Function
Temporarily disable interrupts (clear AIE bit
in RCR1 register to 0) to prevent erroneous
interruption
When interrupts are used, enable interrupts
(set AIE bit in RCR1 register to 1)
Flag must be reset (by clearing AF bit in RCR1
register to 0) since it was set during alarm
time setting
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