参数资料
型号: RV5C387A-F
厂商: RICOH COMPANY LTD
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: 4 X 2.90 MM, 1.20 MM HEIGHT, SSOP-10
文件页数: 4/49页
文件大小: 330K
代理商: RV5C387A-F
RV5C387A
12
2.1-5 CT2, CT1, and CT0
Periodic Interrupt Selection Bits
CT2
CT1
CT0
Description
Waveform Mode
Interrupt Cycle and Fall Timing
00
0—
Off (“H”)
00
1—
Fixed at low (“L”)
01
0
Pulse Mode
2Hz (Duty cycle of 50%)
01
1
Pulse Mode
1Hz (Duty cycle of 50%)
10
0
Level Mode
Once per 1 second (Synchronized with second counter increment)
10
1
Level Mode
Once per minute (at 00 seconds of every minute)
11
0
Level Mode
Once per hour (at 00 minutes and 00 seconds of every hour)
11
1
Level Mode
Once per month (at 00 hours, 00 minutes, and 00 seconds of first day of every month)
(Default setting)
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 on the next page.
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 on the next page.
3) When the oscillation adjustment circuit is used, the interrupt cycle will fluctuate once per 20 seconds as follows:
Pulse Mode: the “L” period of output pulses will increment or decrement by a maximum of ±3.784ms.
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 ±3.784ms.
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