參數(shù)資料
型號(hào)： RV5C386A-E2
廠商： RICOH COMPANY LTD
元件分類： XO, clock
英文描述： I2C-bus Real-Time Clock ICs with Voltage Monitoring Function
中文描述： 0 TIMER(S), REAL TIME CLOCK, PDSO10
封裝： 4 X 2.90 MM, 1.20 MM HEIGHT, SSOP-10
文件頁(yè)數(shù)： 11/42頁(yè)
文件大?。?/td> 362K
代理商： RV5C386A-E2
PRELIMINARY RV5C386A
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(5) CT2,CT1, and CT0
Periodic Interrupt Selection Bits
CT0
Wave form mode
0
-
1
-
0
Pulse Mode *1)
1
Pulse Mode *1)
0
Level Mode *2)
Description
Interrupt Cycle and Falling Timing
OFF(H)
Fixed at “L”
2Hz(Duty50%)
1Hz(Duty50%)
Once per 1 second (Synchronized with
second counter increment)
Once per 1 minute (at 00 seconds of every
minute)
Once per hour (at 00 minutes and 00
seconds of every hour)
Once per month (at 00 hours, 00 minutes,
and 00 seconds of first day of every month)
CT2
CT1
0
0
0
0
1
0
0
1
1
0
(Default)
1
0
1
Level Mode *2)
1
1
0
Level Mode *2)
1
1
1
Level Mode *2)
*1) Pulse Mode: 2-Hz and 1-Hz clock pulses are output in synchronization with the increment of the second
counter as illustrated in the timing chart below.
In the pulse mode, the increment of the second counter is delayed by approximately 92
μ
s from the falling edge of
clock pulses. Consequently, time readings immediately after the falling edge of clock pulses may appear to lag
behind the time counts of the real-time clocks by approximately 1 second. Rewriting the second counter will
reset the other time counters of less than 1 second, driving the /INTRA pin low.
/INTRA Pin
Rewriting of the second counter
CTFG Bit
Approx. 92
μ
s
(Increment of second counter)
*2) Level Mode: Periodic interrupt signals are output with selectable interrupt cycle settings of 1 second, 1
minute, 1 hour, and 1 month. The increment of the second counter is synchronized with the
falling edge of periodic interrupt signals. For example, periodic interrupt signals with an
interrupt cycle setting of 1 second are output in synchronization with the increment of the second
counter as illustrated in the timing chart below.
*1), *2) When the oscillation adjustment circuit is used, the interrupt cycle will fluctuate once per 20sec. as follows:
Pulse Mode: The “L” period of output pulses will increment or decrement by a maximum of
±
3.784 ms. For
example, 1-Hz clock pulses will have a duty cycle of 50
±
0.3784%.
Level Mode: A periodic interrupt cycle of 1 second will increment or decrement by a maximum of
±
3.784 ms.
/INTRA Pin
(Increment of
second counter)
CTFG Bit
Setting CTFG bit to 0
Setting CTFG bit to 0
(Increment of
second counter)
(Increment of
second counter)
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