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參數(shù)資料
| 型號： | RS5C372B |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| 中文描述： | REAL TIME CLOCK, PDSO8 |
| 封裝： | SSOP-8 |
| 文件頁數(shù)： | 10/39頁 |
| 文件大小： | 474K |
| 代理商： | RS5C372B |
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RS5C372B
- 10 -
2. Functions of Registers
2.1. Control Register 1 (Internal address at Eh)
D7
D6
D5
D4
D3
D2
D1
D0
AALE
BALE
0 *1)
0 *1)
TEST
CT2
CT1
CT0
(For write operation)
AALE
0
*1) These bits must be set “0” in any case.
*2) The default means read values when XSTP=”1” by after initial power-on or supply voltage drop,etc.
BALE
0
0
0
0
0
TEST
0
CT2
0
CT1
0
CT0
0
(For read operation)
Default *2)
2.1.1. AALE,BALE
AALE,BALE
Alarm_A, Alarm_B enable bit
Description
0
1
Alarm_A (Alarm_B) correspondence action invalid
Alarm_A (Alarm_B) correspondence action valid
(Default)
2.1.2. TEST
Test bit
TEST
0
1
Description
Ordinary operation mode
Test mode
(Default)
The test bit is used for IC test. Set the TEST bit to 0 in ordinary operation
.
2.1.3. CT2,CT1,CT0
CT2
Periodic interrupt frequency select bit
CT0
Wave form
mode
0
-
1
-
0
Pulse mode
1
Pulse mode
0
Level mode
Description
Frequency and falling timing
CT1
0
0
0
0
1
0
0
1
1
0
OFF(H)
Fixed at “L”
2Hz(Duty50%)
1Hz(Duty50%)
Every second (synchronized with second
count up)
Every minute (00 second of every minute)
Every hour ( 00 minute(s) 00 second(s) of
every hour )
Every month (the 1st day 00 AM 00
minute(s) 00 second(s) of every month )
(Default)
1
1
0
1
1
0
Level mode
Level mode
1
1
1
Level mode
1) Pulse mode: Outputs 2Hz, 1Hz clock pulses. For relationships with counting up of seconds, see the diagram
on the next page.
*) When 32000Hz crystal is used
In the 2Hz clock pulse mode, 0.496s clock pulses and 0.504s clock pulse are output alternately. Duty cycle for
1Hz clock pulses becomes 50.4% (“L” duration is 0.496s while “H” duration is 0.504s).
2) Level mode: One second, one minute or one month may be selected for an interrupt frequency. Counting up of
seconds is matched with falling edge of interrupt output.
3) When the clock error correction circuit is used, periodic interrupt frequency changes every 20 seconds.
Pulse mode: “L” duration of output pulses may change in the maximum range of ±3.784ms (±3.875ms when
32.000kHz crystal is used.) For example, Duty will be 50±0.3784% (or 50±0.3875% when 32.000kHz crystal is
used) at 1Hz.
Level mode: Frequency in one second may change in the maximum range of ±3.784ms (±3.875ms when
32.000kHz crystal is used.)
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| RS5C372B-E1 | I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| RS5C372B-E2 | I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RS5C372B-E1 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| RS5C372B-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| RS5C373A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Real-Time Clock |
| RS5C4FC | 制造商:Dialight 功能描述: |
| RS5C4F-C | 制造商:DIALIGHT 制造商全稱:Dialight Corporation 功能描述:StreetSense? RS Series LED Roadway Sign Light |
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