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参数资料
| 型号： | RX-4591CF |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO10 |
| 封装： | SON-10 |
| 文件页数： | 5/19页 |
| 文件大小： | 256K |
| 代理商： | RX-4591CF |
RX - 4591 CF
Page - 10
MQ - 402 - 01
8.4. Alarm interrupt / Timer interrupt
80.4.1. Alarm interrupt
When the alarm matches and AIE=1, the /IRQ pin outputs "L"; when AIE=0, the /IRQ pin is at the high impedance
level. Alarm data is compared when update occurs just in minutes digits.
"1"
AIE bit
/IRQ output
AF bit
"0"
"1"
"0"
"1"
“0” is written to the AF bit.
Alarm interrupt timing
High impedance
The AIE bit is not output in the “0” range
"0"
"1"
"L" level
How to use
The day of the week, day, hour and minute can be set.
WADA bit sets either the WEEK alarm or the DAY alarm. For the day of the week, multiple days can be set
at one time. To avoid unintended hardware interrupt during the alarm setup, it is recommended that AIE bit
be initially set to "0".
Then, set up the alarm data, and apply zero clear to the AF flag in order to initialize (with certainty) the alarm
circuitry. Afterward, set the AIE bit to "1". If you desire no hardware interrupt, set the AIE bit to "0", and
monitor the AF bit with software as required.
Usage example
1) Set the alarm to go off at 6 pm tomorrow.
Write "0" to the AIE bit.
Write "00h" to the MIN alarm register.
Write "18h" to the HOUR alarm register.
Write tomorrow’s date to the WEEK/DAY alarm register.
Write "1" to the WADA bit (selecting the DAY alarm).
Clear the AF bit to zero.
Write "1" to the AIE bit.
2) Set the alarm to go off at 6 am every morning except Saturdays and Sundays.
Write "0" to the AIE bit.
Write "00h" to the MIN alarm register.
Write "06h" to the HOUR alarm register.
Write "3Eh" to the WEEK/DAY alarm register.
Write "0" to the WADA bit (selecting the WEEK alarm).
Clear the AF bit to zero.
Write "1" to the AIE bit.
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相关代理商/技术参数 |
参数描述 |
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