參數資料
型號: RS5C348B-E2
廠商: RICOH COMPANY LTD
元件分類: XO, clock
英文描述: Real-Time Clock
中文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO10
封裝: 6.40 X 3.50 MM, 1.25 MM HEIGHT, 0.5 MM PITCH, SSOP-10
文件頁數: 19/53頁
文件大?。?/td> 452K
代理商: RS5C348B-E2
R
×
5C348A/B
16
WAFG, DAFG
Description
0
Indicating a mismatch between current time and preset alarm time
1
Indicating a match between current time and preset alarm time
2.2-7 WAFG and DAFG
Alarm_W Flag Bit and Alarm_D Flag Bit
(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 61μs 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 (“H”) the INTR
pin until it is enabled (“L”) 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
Writing of 0 to WAFG
(DAFG) bit
Writing of 0 to WAFG
(DAFG) bit
(
Match between current time
and preset alarm time
)
(
Match between current time
and preset alarm time
)
(
Match between current time
and preset alarm time
)
Settings of WAFG (DAFG) bit
Output of INTR pin
Approx.61
μ
s
Approx.61
μ
s
CTFG
Description
0
Periodic interrupt output “H” (OFF)
1
Periodic interrupt output “L” (ON)
2.2-6 CTFG
Periodic Interrupt Flag Bit
(Default setting)
The CTFG bit is set to 1 when the periodic interrupt signals are output from the INTR pin (“L”). The CTFG bit
accepts only the writing of 0 in the level mode, which disables (“H”) the INTR pin until it is enabled (“L”) again in
the next interrupt cycle. Conversely, setting the CTFG bit to 1 causes no event.
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