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參數資料
| 型號： | M41ST87WMX6T |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數據恢復及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-28 |
| 文件頁數： | 26/38頁 |
| 文件大小： | 552K |
| 代理商： | M41ST87WMX6T |
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M41ST87Y, M41ST87W
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Oscillator Stop Detection
If the Oscillator Fail (OF) Bit is internally set to a '1,'
this indicates that the oscillator has either stopped,
or was stopped for some period of time and can be
used to judge the validity of the clock and date da-
ta. This bit will be set to '1' any time the oscillator
stops. The following conditions can cause the OF
Bit to be set:
– The first time power is applied (defaults to a '1'
on power-up).
– The voltage present on VCC or battery is insuffi-
cient to support oscillation.
– The ST Bit is set to '1.'
If the Oscillator Fail Interrupt Enable Bit (OFIE) is
set to a '1,' the IRQ/OUT pin will also be activated.
The IRQ/OUT output is cleared by resetting the
OFIE Bit to '0' (not by reading the Flag Register),
or the RST output is enabled.
The OF Bit will remain set to '1' until written to logic
'0.' The oscillator must start and have run for at
least 4 seconds before attempting to reset the OF
Bit to '0.' This function operates both under normal
power and in battery back-up. If the trigger event
occurs during a power-down condition, this bit will
be set correctly.
Note: The ABE Bit must be set to '1' for the IRQ/
OUT pin to be activated in battery back-up.
Initial Power-on Defaults
Table 15. Century Bits Examples
Note: 1. Leap year occurs every four years (for years evenly divisible by four), except for years evenly divisible by 100. The only exceptions
are those years evenly divisible by 400 (the year 2000 was a leap year, year 2100 is not).
Table 16. tREC Definitions
Note: 1. Default Setting
CB0
CB1
Leap Year?
Example(1)
00
Yes
2000
0
1
No
2100
1
0
No
2200
1
No
2300
tREC Bit (TR)
STOP Bit (ST)
tREC Time
Units
Min
Max
00
96
98(1)
ms
0
1
40
200
ms
1
X
100
2000
s
相關PDF資料 |
PDF描述 |
|---|---|
| M41T00SC64MY6E | REAL TIME CLOCK, PDSO18 |
| M41T00SM6F | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T00SMY6T | REAL TIME CLOCK, PDSO8 |
| M41T00 | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T0DS6E | REAL TIME CLOCK, PDSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| M41ST87WMX6TR | 功能描述:實時時鐘 Serial 1280 (160x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41ST87WSS6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM |
| M41ST87WSS6F | 功能描述:實時時鐘 128 NVRAM Serial RTC 3.0 to 3.6 Vcc RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41ST87Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection |
| M41ST87Y_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM |
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