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參數(shù)資料
| 型號(hào)： | R2033T |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 3 wire interface Real-Time Clock ICs |
| 中文描述： | 3線接口實(shí)時(shí)時(shí)鐘芯片 |
| 文件頁數(shù)： | 13/50頁 |
| 文件大?。?/td> | 542K |
| 代理商： | R2033T |
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R2033K/T
13
(4) TEST
Test Bit
TEST
Description
0
1
Normal operation mode.
Test mode.
(Default)
The TEST bit is used only for testing in the factory and should normally be set to 0.
(5) CT2,CT1, and CT0
CT2
Periodic Interrupt Selection Bits
CT0
Wave form
mode
0
-
1
-
0
Pulse Mode
*1)
1
Pulse Mode
*1)
0
Level Mode
*2)
1
Level Mode
*2)
0
Level Mode
*2)
1
Level Mode
*2)
Description
Interrupt Cycle and Falling Timing
CT1
0
0
0
0
0
1
OFF(H)
Fixed at “L”
2Hz(Duty50%)
(Default)
0
1
1Hz(Duty50%)
1
0
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)
1
0
1
1
1
1
* 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.
INTR Pin
Rewriting of the second counter
CTFG Bit
Approx. 92
μ
s
(Increment of second counter)
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 INTR pin low.
* 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R2033T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
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