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参数资料
| 型号： | RS5C372A-E2 |
| 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, PDSO8 |
| 封装： | 0.65 MM PITCH, SSOP-8 |
| 文件页数： | 14/59页 |
| 文件大小： | 442K |
| 代理商： | RS5C372A-E2 |
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RS5C372A/B
17
2.1-4 CT2, CT1, CT0
Periodic interrupt cycle select bit
CT2
CT1
CT0
Description
Wave Form Mode
Cycle and Falling Timing
0
—
off (“H”)
0
1
—
Fixed at “L”
0
1
0
Pulse Mode
2Hz (Duty50%)
0
1
Pulse Mode
1Hz (Duty50%)
1
0
Level Mode
Every second (synchronized with second count up)
1
0
1
Level Mode
Every minute (00 second of every minute)
1
0
Level Mode
Every hour (00 minute(s) 00 second(s) of every hour)
1
Level Mode
Every month (the 1st day 00 A.M. 00 minute(s) 00 second(s) of every month)
1) Pulse mode : Outputs 2Hz, 1Hz clock pulses. For relationships with counting up of seconds see the diagram
below.
(Default)
*) When 32.000kHz 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 cycle. Counting up of sec-
onds is matched with falling edge of interrupt output.
3) When the time trimming circuit is used, periodic interrupt cycle 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.)
Relation Between Mode Waveforms and CTFG Bit
Pulse mode
Approx. 92
s (32.768kHz crystal is used)
Approx. 94
s (32.000kHz crystal is used)
CTFG bit
(Counting up of seconds)
INTRA or INTRB pins
(INTR pin for the RS5C372B)
*) Since counting up of seconds and the falling edge has a time lag of approx. 92s (at 32.768kHz) (approx. 94s when 32.000kHz crystal is used), time
with apparently approx. one second of delay from time of the real-time clock may be read when time is read in synchronization with the falling edge of
output.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RS5C372B | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| RS5C372B-E1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| RS5C372B-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| RS5C373A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RS5C4FC | 制造商:Dialight 功能描述: |
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