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參數(shù)資料
| 型號： | MSM6542-02 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT |
| 中文描述： | 實時時鐘周期和報警輸出 |
| 文件頁數(shù)： | 14/54頁 |
| 文件大?。?/td> | 378K |
| 代理商： | MSM6542-02 |
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Semiconductor
MSM6542-01/02/03
81
XT and
XT
(X'tal OSC)
These pins are the connecting terminals to connect the capacitors and crystal oscillator at
32.768kHz as shown below.
V
DD
or
GND
5M
TYP.
200K
TYP.
XT
32.768
kHz
C1
C2
XT
MSM6542
Example
(Equivalent series resistance =
C
1
, C
2
= 15 to 30 pF)
Note:
Oscillation accuracy and allowable values of the equivalent series resistor for the
crystal oscillator depend on the value of the capacitor used for oscillation. For
selection of a crystal oscillator and the value of the capacitor needed for it,
consult the crystal oscillator manufacturer.
To supply external 32.768 kHz clocks, enter CMOS output or pulled-up TTL output to the XT
pin and leave the
XT
pin open.
V
DD
and V
SS
These are power supply pins. Connect the V
SS
pin to ground and supply positive power to the
V
DD
pin.
The 1 Hz, 30 sec ADJ, STOP/START, and 68/80 pins described below are used only for the
MSM6542-03.
1 Hz
This output pin is used to confirm the oscillation frequency. It outputs 1-Hz pluses at a duty
cycle of 50%.
This pin provides one-second output from the clock counter. Therefore, it is cleared to a low
when the REST bit is high or 30-second adjustment is performed. When STOP function is
performed, the output stops at whatever level the output is at that instant.
This pin provides CMOS output level, regardless of the level of the CS
pin. If a load is connected
to this pin during standby operation, the battery will be quickly dissipated.
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PDF描述 |
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| MSM6542-03 | REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MSM6542-02RS | 制造商:ROHM Semiconductor 功能描述: |
| MSM6542-03 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT |
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| MSM6544GS-2KR1 | 制造商:ROHM Semiconductor 功能描述: |
| MSM6545 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Operatable at 0.9 V and Built-in Buzzer Circuit 4-Bit Microcontroller |
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