m41t62 STMicroelectronics, m41t62 Datasheet
m41t62
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m41t62 Summary of contents
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... Serial Access Real-Time Clock with Alarms C bus (400kHz) Operating temperature of –40 to 85°C Lead-free 16-pin QFN package Lithium ion rechargeable operation Table 1 OSC fail Watchdog Calibration detect timer Rev 11 M41T62, M41T63 M41T64, M41T65 QFN16 (Q) 3mm x 3mm VSOJ20 (47.6mm 2 ) (21.5mm 2 ) GND Plane Guard Ring 1 XI SMT 2 XO ...
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... Setting alarm clock registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.4 Watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.5 Watchdog output (WDO - M41T63/65 only 3.6 Square wave output (M41T62/63/64 3.7 Full-time 32KHz square wave output (M41T64 3.8 Century bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.9 Output driver pin (M41T62/65 3.10 Oscillator stop detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.11 Initial power-on defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6 Package mechanical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7 Part numbering ...
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... M41T62/63/64/65 List of tables Table 1. Device options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 3. M41T62 register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 4. M41T63 register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 5. M41T64 register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 6. M41T65 register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 7. Alarm repeat modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 8. Square wave output frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Table 9. Initial power-on default values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 10. ...
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... M41T65 logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 5. M41T62 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 6. M41T63 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 7. M41T64 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 8. M41T65 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 9. M41T62 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 10. M41T63 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 11. M41T64 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 12. M41T65 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 13. Hardware hookup for SuperCap™ back-up operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 14. ...
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... Functions available to the user include a time-of-day clock/calendar, Alarm interrupts (M41T62/65), 32KHz output (M41T64), programmable Square Wave output (M41T62/63/64), and Watchdog output (M41T63/65). The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24 hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day months are made automatically ...
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... Summary description Figure 2. M41T64 logic diagram 1. Open drain. 2. Defaults to 32KHz on power-up. Figure 3. M41T63 logic diagram 1. Open drain. 2. Defaults to 32KHz on power-up. 6/ SQW M41T64 SCL F 32K SDA WDO M41T63 SCL SQW SDA V SS M41T62/63/64/65 (1) (2) AI09108 (1) (2) AI09189 ...
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... M41T62/63/64/65 Figure 4. M41T65 logic diagram 1. Open drain. Figure 5. M41T62 connections 1. SQW output defaults to 32KHz upon power-up. 2. Open drain WDO M41T65 SCL IRQ/FT/OUT SDA (1) 9 SQW Summary description (1) (1) ...
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... ( 32K ( WDO M41T62/63/64/65 NC (2) WDO SCL SDA AI09190 NC (2) SQW SCL SDA AI09101 NC (1) IRQ/FT/OUT SCL SDA AI09102 ...
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... M41T64 only) F Dedicated 32KHz output (M41T64 only) 32K WDO Watchdog timer output (open drain) V Supply voltage CC V Ground SS Figure 9. M41T62 block diagram 32KHz XTAL OSCILLATOR SDA INTERFACE SCL 1. Open drain. 2. Defaults to 32KHz on power-up. Figure 10. M41T63 block diagram XTAL OSCILLATOR SDA INTERFACE SCL 1 ...
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... SCL 1. Open drain. 10/40 REAL TIME CLOCK CALENDAR OSCILLATOR FAIL DETECT RTC W/ALARM WATCHDOG SQUARE WAVE REAL TIME CLOCK CALENDAR OSCILLATOR FAIL DETECT RTC W/ALARM WATCHDOG M41T62/63/64/65 32KE (1) F 32K SQWE (2) SQW AI09192 OFIE FT (1) AFE IRQ/FT/OUT (1) WDO AI09193 ...
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... Figure 13. Hardware hookup for SuperCap™ back-up operation Diode required on open drain pin (M41T65 only) for SuperCap (or battery) back-up. Low threshold BAT42 diode recommended. 2. For M41T62 and M41T65 (open drain). 3. For M41T63 and M41T65 (open drain). 4. For M41T64 (open drain). (1) ...
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... Start data transfer A change in the state of the data line, from high to Low, while the clock is High, defines the START condition. 2.1.3 Stop data transfer A change in the state of the data line, from Low to High, while the clock is High, defines the STOP condition. 12/40 M41T62/63/64/65 ...
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... M41T62/63/64/65 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 be changed during the Low period of the clock signal. There is one clock pulse per bit of data. ...
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... The first address that is read is the last one stored in the pointer (see 14/40 START 1 2 MSB 15). Following the WRITE Mode Control Bit (R/W=0) and the Figure 18 on page M41T62/63/64/65 CLOCK PULSE FOR ACKNOWLEDGEMENT 8 9 LSB AI00601 15). ...
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... M41T62/63/64/65 Figure 16. Slave address location START Figure 17. READ mode sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS DATA n+X Figure 18. Alternative READ mode sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS SLAVE ADDRESS WORD S ADDRESS (An) ...
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... The M41T6x slave receiver will send an acknowledge clock to the master transmitter after it has received the slave address see Figure 16 on page 15 data byte. Figure 19. WRITE mode sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS 16/40 and again after it has received the word address and each WORD DATA n ADDRESS (An) M41T62/63/64/65 DATA n+1 DATA n+X P AI00591 ...
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... If a clock address is being read, an update of the clock registers will be halted. This will prevent a transition of data during the READ. Table 3: M41T62 register map, map, and Table 6: M41T65 register 28) will also generate an interrupt output ...
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... The update will resume either due to a Stop Condition or when the pointer increments to a non-clock address. TIMEKEEPER and Alarm Registers store data in BCD format. Calibration, Watchdog, and Square Wave Bits are written in a Binary Format. 18/40 ® registers M41T62/63/64/65 ™ ...
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... M41T62/63/64/65 Table 3. M41T62 register map Addr D7 00h 01h ST 02h OFIE 03h 0 04h RS3 05h 0 06h CB1 07h 08h OUT 09h RB2 BMB4 BMB3 0Ah AFE SQWE 0Bh RPT4 RPT5 0Ch RPT3 0Dh RPT2 0Eh RPT1 0Fh WDF 1. Keys must be set to '0' ...
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... S Calibration BMB2 BMB1 BMB0 0 Al 10M Alarm month AI 10 date hour Alarm 10 minutes Alarm minutes Alarm 10 seconds Alarm seconds M41T62/63/64/65 Function/range BCD format 10ths/100ths of seconds Seconds Seconds Minutes Minutes Hours Day of week Day Date Century/ Month month ...
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... M41T62/63/64/65 Table 5. M41T64 register map Addr D7 00h 0.1 seconds 01h ST 02h 0 03h 0 04h RS3 RS2 05h 0 06h CB1 CB0 07h 08h 0 09h RB2 BMB4 0Ah 0 SQWE 0Bh RPT4 RPT5 0Ch RPT3 0Dh RPT2 0Eh RPT1 0Fh WDF 1. Keys must be set to '0' 32KE = 32KHz enable bit ...
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... FT S Calibration BMB2 BMB1 BMB0 10M AI 10 date hour Alarm 10 minutes Alarm minutes Alarm 10 seconds Alarm seconds M41T62/63/64/65 Function/range BCD format 10ths/100ths 0.01 seconds of seconds Seconds Seconds Minutes Minutes Hours Day of week Day Date Century/ Month month ...
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... Calibration byte. The second approach is better suited to a manufacturing environment, and involves the use of either the SQW pin (M41T62/63/64) or the IRQ/FT/OUT pin (M41T65). The SQW pin will toggle at 512Hz when RS3 = '0,' RS2 = '1,' RS1 = '1,' RS0 = '0,' SQWE = '1,' and ...
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... Figure 21. Calibration waveform NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 24/ – –0.036 ppm –20 – Temperature C M41T62/63/64/ ± 0.006 ppm ± AI07888 AI00594B ...
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... When the clock information matches the alarm clock settings based on the match criteria defined by RPT5–RPT1, the AF (Alarm Flag) is set. If AFE (Alarm Flag Enable) is also set (M41T62/65), the alarm condition activates the IRQ/OUT or IRQ/FT/OUT pin. To disable the alarm, write '0' to the Alarm Date Register and to RPT5–RPT1. ...
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... Watchdog Register = 3 seconds). If the processor does not reset the timer within the specified period, the M41T6x sets the WDF (Watchdog Flag) and generates an interrupt on the IRQ pin (M41T62 watchdog output pulse (M41T63 and M41T65 only) on the WDO pin. The watchdog timer can only be reset by having the microprocessor perform a WRITE of the Watchdog Register ...
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... Wave Enable Bit (SQWE) located in Register 0Ah. The SQW output is an N-channel, open drain output driver for the M41T64, and a full CMOS output driver for the M41T62/63. The initial power-up default for the SQW output is 32KHz (except for M41T64, which defaults disabled). ...
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... These two bits will increment in a binary fashion at the turn of the century, and handle all leap years correctly. See 3.9 Output driver pin (M41T62/65) When the OFIE Bit, AFE Bit, and watchdog register are not set to generate an interrupt, the IRQ/OUT pin becomes an output driver that reflects the contents the Calibration Register ...
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... M41T62/63/64/65 Table 9. Initial power-on default values Condition Device ST OF OFIE OUT FT AFE SQWE 32KE RS3-1 RS0 Watchdog M41T62 M41T63 Initial (1) power-up M41T64 M41T65 1. All other control bits power- undetermined state. Table 10. Century bits examples CB0 Leap year occurs every four years (for years evenly divisible by four), except for years evenly divisible by 100 ...
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... Data based on characterization results, not tested in production. 3. Reflow at peak temperature of 260°C (total thermal budget not to exceed 245°C for greater than 30 seconds). 30/40 Parameter Conditions off, oscillator off M41T62/63/64/65 (1) (2) Value Unit –55 to 125 °C –0.3 to 5.0 V 260 °C –0.2 to Vcc+0.3 ...
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... M41T62/63/64/ 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 from tests performed under the Measurement Conditions listed in the relevant tables. Designers should check that the operating conditions in their projects match the measurement conditions when using the quoted parameters ...
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... V = 4.4V (SQW, WDO, IRQ 4.4V –1.0mA (push-pull IRQ/OUT, IRQ/FT/OUT, WDO, SQW (M41T64 only OUT = –40 to 85° fall time should not exceed 10mV/µs. CC M41T62/63/64/65 Min (1) Min Typ 1.0 1.3 4.4V 3.6V 50 3.0V 35 2.5V 30 2.0V 20 4.4V 3.6V 375 3.0V @ 25°C 350 2.0V @ 25° ...
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... M41T62/63/64/65 Table 15. Crystal electrical characteristics Sym f Resonant frequency O R Series resistance ( S C Load capacitance L 1. Externally supplied if using the QFN16 package. STMicroelectronics recommends the Citizen CFS-145 (1.5x5mm) and the KDS DT-38 (3x8mm) for thru-hole, or the KDS DMX-26S (3.2x8mm) for surface-mount, tuning fork-type quartz crystals. ...
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... Valid for Ambient Operating Temperature Transmitter must internally provide a hold time to bridge the undefined region (300ns max) of the falling edge of SCL. 34/40 (1) Parameter = –40 to 85° 1.3 to 4.4V (except where noted M41T62/63/64/65 Min Typ Max Units 0 400 kHz 1.3 µs 600 ...
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... M41T62/63/64/65 6 Package mechanical information In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label ...
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... AI09126 M41T62/63/64/65 inches Typ Min 0.035 0.032 0.001 0.000 0.008 – 0.010 0.007 0.118 0.114 0.067 0.061 0.118 0.114 0.067 0.061 0.020 – 0.008 – 0.016 0.012 – 0.003 – 0.013 16 2.0 0.28 Max 0.039 0.002 – ...
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... M41T62/63/64/65 Figure 28. 32KHz crystal + QFN16 vs. VSOJ20 mechanical data 1. Dimensions shown are in millimeters (mm). 7.0 ± 0.3 VSOJ20 XI 1 6.0 ± 0.2 SMT 2 XO CRYSTAL 3 QFN16 1.5 Package mechanical information 2.9 2.9 AI11146 37/40 ...
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... V = 1.3V to 4.4V CC Package Q = QFN16 (3mm x 3mm) Temperature range 6 = –40°C to 85°C Shipping method for SOIC F = ECOPACK package, Tape & Reel For other options, or for more information on any aspect of this device, please contact the ST Sales Office nearest you. 38/40 M41T 62 Q M41T62/63/64/ ...
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... M41T62/63/64/65 8 Revision history Table 20. Revision history Date November 13, 2003 19-Nov-03 25-Dec-03 14-Jan-04 27-Feb-04 02-Mar-04 26-Apr-04 13-May-04 06-Aug-04 11-Oct-04 18-Jan-05 05-May-05 31-Oct-05 30-Nov-05 22-Aug-2006 Revision 1.0 First Issue Add features, update characteristics 1.1 Figure 9, Figure 22; Table Table 17) 2.0 Reformatted; add crystal isolation, footprint Update characteristics 2 ...
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