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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： | 42/59页 |
| 文件大小： | 442K |
| 代理商： | RS5C372A-E2 |
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RS5C372A/B
43
4.3 Periodic (Clock) Interrupt
The INTRA or INTRB pin (INTR for the RS5C372B) output, the periodic interrupt cycle select bits (CT2, CT1, CT0) and
the interrupt output select bits (SL2, SL1) can be used to interrupt the CPU in a certain cycle. The periodic interrupt
cycle select bits can be used to select either one of two interrupt output modes: the pulse mode and the level mode.
Interrupt Cycle Selection
CT2
CT1
CT0
Description
Wave From Mode
Cycle and Falling Timing
0
—
OFF (Default)
0
1
—
Fixed at “L”
0
1
0
Pulse mode
2Hz (Duty50%)
0
1
Pulse mode
1Hz (Duty50%)
1
0
Level mode
Every second (coincident with second count-up)
1
0
1
Level mode
Every minute (at 00 second)
1
0
Level mode
Every hour (at 00:00 on the hour)
1
Level mode
Every month (1st day, 00:00:00 a.m.)
1) Pulse mode : Outputs 2Hz, 1Hz clock pulses. For relationships with counting up of seconds see the diagram
below.
*) 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).
4.2-2 Alarm Interrupt (RS5C372B)
For setting an alarm time, designated time such as day-of-the-week, hour or minute should be set to the alarm regis-
ters being AALE (BALE) bit to 0. After that set the AALE (BALE) bit to 1, from this moment onward when such
registered alarm time coincide the value of calendar counter the INTR comes down to “L” (ON). The INTR output
can be controlled by operating to the AALE (BALE) and AAFG (BAFG) bits.
Alarm-calendar coincidence
period (1 min.)
Day-of-
the-week,
time
matched
Day-of-
the-week,
time
matched
Day-of-
the-week,
time
matched
Day-of-
the-week,
time
matched
INTR
AALE
←1
(BALE)
AALE
←1
(BALE)
AALFG
←0
(BAFG)
AALE
←0
(BALE)
AALE
←0
(BALE)
AALE
←1
(BALE)
A
A : MAX.61.1
s
(MAX. 62.5
s when 32.000kHz crystal is used.)
*) Note that AAFG (BAFG) has an output wave form of reversed logic.
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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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