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參數(shù)資料
| 型號： | M41ST84WMQ6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOP-16 |
| 文件頁數(shù)： | 16/34頁 |
| 文件大?。?/td> | 298K |
| 代理商： | M41ST84WMQ6F |
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M41ST84W
Clock operation
pin. This will also disable the watchdog function until it is again programmed correctly. A
READ of the flags register will reset the watchdog flag (Bit D7; Register 0Fh).
The watchdog function is automatically disabled upon power-up and the watchdog register
is cleared. If the watchdog function is set to output to the IRQ/FT/OUT pin and the frequency
test (FT) function is activated, the watchdog function prevails and the frequency test function
is denied.
3.6
Square wave output
The M41ST84W offers the user a programmable square wave function which is output on
the SQW pin. The RS3-RS0 bits located in 13h establish the square wave output frequency.
These frequencies are listed in Table 5. Once the selection of the SQW frequency has been
completed, the SQW pin can be turned on and off under software control with the square
wave enable bit (SQWE) located in register 0Ah.
Table 5.
Square wave output frequency
3.7
Power-on reset
The M41ST84W continuously monitors VCC. When VCC falls to the power fail detect trip
point, the RST pulls low (open drain) and remains low on power-up for trec after VCC passes
VPFD(max). The RST pin is an open drain output and an appropriate pull-up resistor should
be chosen to control rise time.
Square wave bits
Square wave
RS3
RS2
RS1
RS0
Frequency
Units
00
None
–
00
01
32.768
kHz
0
1
0
8.192
kHz
0
1
4.096
kHz
0
1
0
2.048
kHz
0
1
0
1
1.024
kHz
01
10
512
Hz
01
11
256
Hz
10
00
128
Hz
10
01
64
Hz
10
32
Hz
10
11
16
Hz
11
00
8
Hz
11
01
4
Hz
11
10
2
Hz
11
1
Hz
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相關(guān)代理商/技術(shù)參數(shù) |
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| M41ST84WMQ6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.0/3.3V I2C Serial RTC with Supervisory Functions |
| M41ST84WSH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84YMH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84YMH1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
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