R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 749
R0K572030S000BE
Manufacturer Part Number
R0K572030S000BE
Description
KIT DEV FOR SH7203
Manufacturer
Renesas Electronics America
Series
Renesas Starter Kits (RSK)r
Type
MCUr
Specifications of R0K572030S000BE
Contents
CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
Silicon Manufacturer
Renesas
Kit Contents
Board
Silicon Family Name
SH7203
Silicon Core Number
R5S72030W200FP
Tool / Board Applications
General Purpose MCU, MPU, DSP, DSC
Mcu Supported Families
SH7203
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
SH7203
Lead Free Status / Rohs Status
Compliant
- Current page: 749 of 1686
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14.4.4
Figure 14.4 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 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.
The alarm flag is set when the clock and alarm times match. However, the alarm flag can be
cleared by writing 0.
Alarm Function
Disable alarm interrupt
Enable alarm interrupt
(wait for interrupt or
Monitor alarm time
check alarm flag)
Clear alarm flag
Set alarm time
Clock running
Figure 14.4 Using Alarm Function
Write 0 to AIE in RCR1
to prevent errorneous interrupt
Always clear, since the flag may have been
set while the alarm time was being set.
Write 1 to AIE in RCR1
Rev. 3.00 Sep. 28, 2009 Page 717 of 1650
Section 14 Realtime Clock (RTC)
REJ09B0313-0300
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