參數(shù)資料
型號(hào)： RS5C372B
廠商： RICOH COMPANY LTD
元件分類(lèi)： 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(yè)數(shù)： 29/39頁(yè)
文件大?。?/td> 474K
代理商： RS5C372B
RS5C372B
- 29 -
4.3. Periodic Interrupt
The /INTR pin outputs, the Periodic interrupt frequency select register, and the Interrupt output
select bit can be used to interrupt the CPU in a certain cycle. The Periodic interrupt frequency select register
can be used to select either one of two interrupt output modes: the pulse mode and the level mode.
Periodic interrupt frequency select register (D2-0 at internal address Eh)
CT2
CT1
CT0
Wave form
mode
0
0
0
-
OFF(H)
0
0
1
-
Fixed at “L”
0
1
0
Pulse mode
2Hz(Duty50%)
0
1
1
Pulse mode
1Hz(Duty50%)
1
0
0
Level mode
Every second (synchronized with second
count up)
1
0
1
Level mode
Every minute (00 second of every minute)
1
1
0
Level mode
Every hour ( 00 minute(s) 00 second(s) of
every hour )
1
1
1
Level mode
Every month (the 1st day 00 AM 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 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)
1) 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.
2) 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.)
Description
Frequency and falling timing
(Default)
Pulse mode
/INTR pin
(Counting up of seconds)
Approx. 92us (32.768KHz crystal is used)
Approx. 94us (32.000KHz crystal is used)
CTFG bit
*) Since counting up of seconds and the falling edge has a time lag of approx.
92μs (at 32.768kHz) (approx. 94μs 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.
相關(guān)PDF資料
PDF描述
RS5C372B-E1 I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2 I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C62 REAL-TIME CLOCK
RSBL-9-S Using Permanent Magnet, High sensitivity Two Poles Signal Relay RSB RELAYS
RSB-12 Using Permanent Magnet, High sensitivity Two Poles Signal Relay RSB RELAYS
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(chēng):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(chēng):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(chēng):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(chēng):Dialight Corporation 功能描述:StreetSense? RS Series LED Roadway Sign Light
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