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RV5C338A-E2 Datasheet

  • RV5C338A-E2

  • 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MON...

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R
脳
5C338A
2.2-7 WAFG and DAFG
Alarm_W Flag Bit and Alarm_D Flag Bit
WAFG, DAFG
Description
0
1
Indicating a mismatch between current time and preset alarm time
Indicating a match between current time and preset alarm time
(Default setting)
The WAFG and DAFG bits are valid only when the WALE and DALE bits have the setting of 1, which is caused
approximately 61碌s after any match between current time and preset alarm time specified by the Alarm_W registers
and the Alarm_D registers. The WAFG and DAFG bits accept only the writing of 0, which disables (鈥淗鈥? the INTR
pin until it is enabled (鈥淟鈥? again at the next preset alarm time. Conversely, setting the WAFG and DAFG bits to 1
causes no event. The WAFG and DAFG bits will have the reading of 0 when the alarm interrupt circuit is disabled
with the WALE and DALE bits set to 0. The settings of the WAFG and DAFG bits are synchronized with the output
of the INTR pin as shown in the timing chart below.
Output Relationships Between the WAFG or DAFG Bit and INTR
Approx. 61碌s
Approx. 61碌s
Settings of WAFG (DAFG) bit
Output of INTR pin
Writing of 0 to WAFG
(DAFG) bit
(Match between current time
and preset alarm time)
(Match between current time
and preset alarm time)
Writing of 0 to WAFG
(DAFG) bit
(Match between current time
and preset alarm time)
15

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