- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45050 > M41T82RMY6F (STMICROELECTRONICS) 1 TIMER(S), REAL TIME CLOCK, PDSO18 PDF資料下載
參數(shù)資料
| 型號： | M41T82RMY6F |
| 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, PDSO18 |
| 封裝： | 0.300 INCH, ROHS COMPLIANT, PLASTIC, SOP-18 |
| 文件頁數(shù)： | 28/58頁 |
| 文件大?。?/td> | 462K |
| 代理商： | M41T82RMY6F |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當(dāng)前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁
Clock operation
M41T82 M41T83
Two methods are available for ascertaining how much calibration a given M41T8x may
require:
●
The first involves setting the clock, letting it run for a month and comparing it to a known
accurate reference and recording deviation over a fixed period of time. This allows the
designer to give the end user the ability to calibrate the clock as the environment
requires, even if the final product is packaged in a non-user serviceable enclosure. The
designer could provide a simple utility that accesses either or both of the Calibration
bytes.
●
The second approach is better suited to a manufacturing environment, and involves the
use of the IRQ1/FT/OUT pin. The IRQ1/FT/ OUT pin will toggle at 512Hz when FT and
OUT bits = '1' (M41T83 only) and ST = '0.' Any deviation from 512Hz indicates the
degree and direction of oscillator frequency shift at the test temperature. For example,
a reading of 512.010124 Hz would indicate a +20 ppm oscillator frequency error,
requiring either a –10 (xx001010) to be loaded into the Digital Calibration byte, or +6 pF
(00011000) into the Analog Calibration byte for correction.
Note:
Setting or changing the Digital Calibration byte does not affect the Frequency Test, Square
Wave, or Watchdog Timer frequency, but changing the Analog Calibration byte DOES affect
all functions derived from the low current oscillator (see Figure 19).
Figure 19.
Clock divider chain and calibration circuits
AI11806c
Analog Calibration
Circuitry
Remainder of
Divider Circuit
1Hz Signal
512Hz Output
Frequency Test
32KHz
Low Current
Oscillator
CXI
CXO
÷2
÷8
÷2
Digital Calibration Circuitry
(divide by 511/512/513)
Clock
Registers
Square Wave
Watchdog Timer
8-bit Timer
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M41T82SQA6F | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| M41T83RM6F | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T83ZM6E | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T83ZQA6E | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| M41T83RMY6E | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41T82RQ6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T82RQ6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T82RQA6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial I2C bus RTC with battery switchover |
| M41T82RQA6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial I2C bus RTC with battery switchover |
| M41T82SM6E | 功能描述:實時時鐘 Serial I2C bus RTC 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。