M41T60_05 STMICROELECTRONICS [STMicroelectronics], M41T60_05 Datasheet
M41T60_05
Related parts for M41T60_05
M41T60_05 Summary of contents
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Features summary ■ Counters for seconds, minutes, hours, day, date, month, years, and century ■ 32kHz crystal oscillator integrating load capacitance and high crystal series resistance operation ■ Oscillator stop detection monitors clock operation 2 ■ Serial interface supports I ...
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Contents Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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M41T60 1 Summary description The M41T60 is a low power Serial RTC with a built-in 32.768kHz oscillator (external crystal controlled). Eight registers are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data ...
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Summary description Figure 3. Block diagram XI OSCILLATOR 32.768 kHz SCL SERIAL BUS INTERFACE SDA Note: 1 Open drain output. Figure 4. Hardware hookup for SuperCap™ back-up operation V CC Note: 1 Open drain output. ...
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M41T60 2 Operation The M41T60 clock operates as a slave device on the serial bus. Access is obtained by implementing a start condition followed by the correct slave address (D0h). The 8 bytes contained in the device can then be ...
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Operation 2.1.4 Data valid The state of the data line represents valid data when after a start condition, the data line is stable for the duration of the High period of the clock signal. The data on the line may ...
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M41T60 Figure 6. Acknowledgement sequence 2.2 READ mode In this mode, the master reads the M41T60 slave after setting the slave address (see Figure 7). Following the WRITE Mode Control Bit (R and the Acknowledge Bit, the word ...
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Operation 2.3 WRITE mode In this mode the master transmitter transmits to the M41T60 slave receiver. Bus protocol is shown in Figure 10 on page (R placed on the bus and indicates to the addressed device that ...
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M41T60 Figure 9. Alternate READ mode sequence BUS ACTIVITY: MASTER SDA LINE BUS ACTIVITY: Figure 10. WRITE mode sequence BUS ACTIVITY: MASTER SDA LINE BUS ACTIVITY: S DATA n DATA n+1 SLAVE ADDRESS WORD S DATA n ADDRESS (An) SLAVE ...
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Clock operation 3 Clock operation The M41T60 is driven by a quartz-controlled oscillator with a nominal frequency of 32.768KHz. The accuracy of the Real-Time Clock depends on the frequency of the quartz crystal that is used as the time-base for ...
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M41T60 These bits can be set to represent any value between 0 and 31 in binary format. Bit Sign Bit; '1' indicates positive calibration, '0' indicates negative calibration. Calibration occurs within a 64-minute cycle. The first 62 ...
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Clock operation Table 2. Register map Address OFIE CB1 6 7 OUT ● Must be set to '0.' ● CB0, CB1 = Century Bits ● ...
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M41T60 Figure 12. Calibration waveform NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 3.2 Century bits These two bits will increment in a binary fashion at the turn of the century, and handle leap years correctly. See 3.3 Output driver pin When the ...
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Clock operation 3.5 Initial power-on defaults Upon initial application of power to the device, the OUT Bit will be set to a '1,' while the ST, OFIE, and FT Bits will be set to '0.' All other Register bits will ...
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M41T60 4 Maximum rating Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions ...
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DC and AC parameters 5 DC and AC parameters This section summarizes the operating and measurement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC Characteristic tables are derived ...
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M41T60 Table 7. DC Characteristics Symbol Parameter (2) Operating Voltage Supply Current CC1 I Supply Current CC2 (Standby) V Input Low Voltage IL V Input High Voltage IH V Output Low Voltage OL Pull-up Supply Voltage (Open ...
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DC and AC parameters Table 9. Oscillator characteristics Symbol V Oscillator Start Voltage STA t Oscillator Start Time STA C XIN g C XOUT d IC-to-IC Frequency Variation 1. Reference value. T Figure 15. Bus timing requirements sequence SDA tBUF ...
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M41T60 6 Package mechanical information Figure 16. QFN16 – 16-lead, quad, flat package, no lead, 3x3mm body size, Outline Note: Drawing is not to scale ddd Package mechanical information ...
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Package mechanical information Table 11. QFN16 – 16-lead, Quad, Flat Package, No Lead, 3x3mm body size, Mechanical Data Dim ddd Ch N Figure 17. QFN16, quad, flat package, no ...
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M41T60 Figure 18. 32KHz Crystal + QFN16 vs. VSOJ20 mechanical data Note: Dimensions shown are in millimeters (mm). 7.0 ± 0.3 VSOJ20 6.0 ± 0.2 SMT CRYSTAL 3.2 1.5 Package mechanical information 2 ...
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Part numbering 7 Part numbering Table 12. Ordering Information Scheme Example: Device Family M41T Device Type and Supply Voltage 1.3 to 4.4V CC Package Q = QFN16 (3mm x 3mm) Temperature Range 6 = –40 to ...
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M41T60 8 Revision history Table 13. Revision history Date Version 13-Nov-2003 20-Nov-2003 25-Dec-2003 13-Jan-2004 26-Feb-2004 02-Mar-2004 26-Apr-2004 13-May-2004 06-Aug-2004 25-Oct-2004 20-Dec-2004 05-May-2005 31-Oct-2005 30-Nov-2005 06-Jul-2006 1.0 First Issue 1.1 Update characteristics (Figure 2.0 Reformatted; add crystal isolation, footprint 2.1 Update ...
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Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any ...