M41T00M6E STMicroelectronics, M41T00M6E Datasheet
M41T00M6E
Specifications of M41T00M6E
M41T00M6
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M41T00M6E Summary of contents
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FEATURES SUMMARY 2.0 TO 5.5V CLOCK OPERATING VOLTAGE COUNTERS FOR SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEARS, AND CENTURY YEAR 2000 COMPLIANT SOFTWARE CLOCK CALIBRATION AUTOMATIC SWITCH-OVER AND DESELECT CIRCUITRY BUS COMPATIBLE ULTRA-LOW BATTERY SUPPLY CURRENT OF ...
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M41T00 TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Table 7. DC Characteristics ...
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M41T00 SUMMARY DESCRIPTION ® The M41T00 TIMEKEEPER Serial TIMEKEEPER with a built-in 32.768kHz os- cillator (external crystal controlled). Eight bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and ...
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Figure 4. Block Diagram OSCI OSCILLATOR 32.768 kHz OSCO FT/OUT V CC VOLTAGE SENSE and V SS SWITCH V BAT CIRCUITRY SCL SERIAL BUS INTERFACE SDA 1 Hz SECONDS DIVIDER CENTURY/HOURS CONTROL LOGIC ADDRESS REGISTER M41T00 MINUTES DAY DATE MONTH ...
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M41T00 OPERATION The M41T00 clock operates as a slave device on the serial bus. Access is obtained by implementing a start condition followed by the correct slave ad- dress (D0h). The 8 bytes contained in the device can then be ...
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Figure 5. Serial Bus Data Transfer Sequence CLOCK DATA START CONDITION Figure 6. Acknowledgement Sequence START SCLK FROM MASTER DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER DATA LINE STABLE DATA VALID CHANGE OF DATA ALLOWED 1 2 MSB M41T00 ...
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M41T00 Figure 7. Bus Timing Requirements Sequence SDA tBUF SCL P S Note STOP and S = START Table 2. AC Characteristics Symbol f SCL Clock Frequency SCL t Clock Low Period LOW t Clock High Period HIGH ...
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READ Mode In this mode, the master reads the M41T00 slave after setting the slave address (see Figure 8). Fol- lowing the WRITE Mode Control Bit (R and the Acknowledge Bit, the word address An is writ- ten ...
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M41T00 Figure 10. Alternate READ Mode Sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS WRITE Mode In this mode the master transmitter transmits to the M41T00 slave receiver. Bus protocol is shown in Figure 11., page 10. ...
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CLOCK OPERATION The eight byte clock register (see Table 3) is used to both set the clock and to read the date and time from the clock binary coded decimal format. Seconds, Minutes, and Hours are contained within ...
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M41T00 Clock Calibration The M41T00 is driven by a quartz controlled oscil- lator with a nominal frequency of 32,768Hz. The devices are tested not to exceed 35 ppm (parts per million) oscillator frequency error at 25°C, which equates to about ...
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Figure 12. Crystal Accuracy Across Temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 –20 Figure 13. Clock Calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION – ...
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... FT Bit will be set to a '0' and the OUT Bit will be set to a '1'. All other Register bits will initially power- random state. not implied. Exposure to Absolute Maximum Rat- ing conditions for extended periods may affect de- vice reliability. STMicroelectronics SURE Program and other rel- evant quality documents. Parameter Off, Oscillator Off) CC Refer also ...
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DC AND AC PARAMETERS This section summarizes the operating and mea- surement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC Characteristic tables are derived from tests performed under ...
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... Load Capacitance L Note: 1. These values are externally supplied. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning Fork Type (thru- hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at kou- hou@kdsj.co.jp or http://www.kdsj.co.jp for further information on this crystal type. ...
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Figure 15. Power Down/Up Mode AC Waveforms tPD SDA SCL Table 9. Power Down/Up AC Characteristics Symbol t SCL and SDA (2) SCL and SDA REC Note: 1. Valid for ...
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M41T00 PACKAGE MECHANICAL INFORMATION Figure 16. SO8 – 8-lead Plastic Small Package Outline Note: Drawing is not to scale. Table 11. SO8 – 8-lead Plastic Small Outline Package Mechanical Data Symb Typ ...
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PART NUMBERING Table 12. Ordering Information Scheme Example: Device Type M41T Supply Voltage and Write Protect Voltage 2.0 to 5.5V CC Package M = SO8 (150 mils width) Temperature Range 6 = –40 to 85°C Shipping ...
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M41T00 REVISION HISTORY Table 13. Document Revision History Date Version March 1999 1.0 First Issue 05/15/00 1.1 AC Characteristic conditions changed (Table 2) 07/25/00 1.2 Crystal Electrical Characteristics: R Edit V 12/12/00 1.3 01/24/01 2.0 Reformatted 02/27/01 3.0 Document Status ...
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... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...