S-35399A03-J8T2G Seiko Instruments, S-35399A03-J8T2G Datasheet
S-35399A03-J8T2G
Specifications of S-35399A03-J8T2G
Related parts for S-35399A03-J8T2G
S-35399A03-J8T2G Summary of contents
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... The S-35399A03 is a CMOS 2-wire real-time clock IC which operates with the very low current consumption and in the wide range of operation voltage. The operation voltage that this IC can be used for various power supplies from main supply to backup battery. Due to the 0.34 μA current consumption and wide range of power supply voltage at time keeping, this IC makes the battery life longer. In the system which operates with a backup battery, the included free registers can be used as the function for user’ ...
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... REAL-TIME CLOCK S-35399A03 Pin Configuration Remark Please select products of environmental code = U for Sn 100%, halogen-free products. List of Pin Pin No. Symbol Description Output pin for interrupt 1 INT 1 signal 1 2 XOUT Connection pin for crystal oscillator 3 XIN 4 VSS GND pin Output pin for interrupt ...
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... This pin outputs a signal of interrupt clock pulse. By using the status register 2, users can select either of; alarm 1 interrupt, output of user-set frequency, per-minute edge interrupt, minute-periodical interrupt 1, minute-periodical interrupt 2, or 32.768 kHz output. This pin has Nch open drain output. ...
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... S-35399A03 Block Diagram XIN Oscillator XOUT Divider, timing generator Clock correction register Status register 1 Status register 2 Free register 1 Free register 2 Free register 3 24-bit binary up counter Low power supply voltage VDD detector Constant- voltage circuit 4 INT1 controller INT1 register Alarm expansion Comparator 1 ...
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... Storage temperature T stg *1. Conditions with no condensation or frost. Condensation and frost cause short circuiting between pins, resulting in a malfunction. Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. ...
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... V − DD − 0.3 − 0. 5 9.1 pF) manufactured by Seiko Instruments Inc.) g Min. Typ. − 0.36 − 0.82 INT 1 pin) − 20 − 0.5 − − 0.5 − − 0.5 − − 0.5 − ...
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... SCL, SDA rise time SCL, SDA fall time Bus release time Noise suppression time *1. Since the output format of the SDA pin is Nch open-drain output, SDA output delay time is determined by the values of the load resistance (R ) and load capacity (C L *2. Regarding the power supply voltage, refer to “ Recommended Operation Conditions” . ...
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... Read/Write command to the SDA bus. After that, output or input is performed from B7 of data. If data I/O has been completed, finish communication by inputting a stop condition to the S-35399A03. The master device generates an acknowledgment signal for every 1-byte. Regarding details, refer to “ ...
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... Write-only flag. The S-35399A03 initializes by writing “1” in this register. *2. Scratch bit. A R/W-enabled, user-free register. *3. Read-only flag. Valid only when using the alarm function. When the alarm time matches, this flag is set to “1”, and it is cleared to “0” when Read. ...
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... Configuration of Register 1. Real-time data register The real-time data register is a 7-byte register that stores the data of year, month, day, day of the week, hour, minute, and second in the BCD code. To Write/Read real-time data 1 access, transmit/receive the data of year in B7, month, day, day of the week, hour, minute, second in B0, in 7-byte ...
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... Feb. (leap year 28: Feb. (non-leap year) Example: 29 (D1, D2, D4, D8, D10, D20 ( Day of the week data (00 to 06): W1, W2 septenary up counter. Day of the week is counted in the order of 00, 01, 02, …, 06, and 00. Set up day of the week and the count value. Hour data ( 11): H1, H2, H4, H8, H10, H20 12-hour expression, write 0 ...
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... The INT1 flag in “1” at alarm 1 interrupt mode, the INT2 flag in “1” at alarm 2 interrupt mode. Set “0” in INT1AE (B5 in the status register INT2AE (B1 in the status register 2) after reading “1” in the INT1 flag or in the INT2 flag. This flag is Read-only. This flag is read once, is set to “0” automatically. ...
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... R/W R TEST This is a test flag for SII. Be sure to set this flag to “0” in use. If this flag is set to “1”, be sure to initialize to set “0” INT2AE INT2ME INT2FE These bits are used to select the output mode for the alarm 2 interrupt, set alarm interrupt mode, then access the INT2 register and the alarm expansion register 2. ...
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... Figure 12 INT1 Register and INT2 Register (Alarm Time-Data) The INT1 register has A1WE, A1HE, A1mE each byte possible to make data valid; the data of day of the week, hour, minute which are in the corresponded byte; by setting these bits to “1”. This is as well in A2WE, A2HE, A2mE in the INT2 register. Regarding set-up of year, month, day, refer to “ ...
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... Output of user-set frequency The INT1 and INT2 registers are 1-byte data registers to set up the output frequency. Setting each bit the register to “1”, the frequency which corresponds to the bit is output in the AND-form. SC2 to SC4 in the INT1 register, and SC5 to SC7 in the INT2 register are 3-bit SRAM type registers that can be freely set by users. ...
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... REAL-TIME CLOCK S-35399A03 5. Clock-correction register The clock-correction register is a 1-byte register that is used to correct advance/delay of the clock. When not using this function, set this register to “00h”. Regarding the register values, refer to “ Function to Clock-Correction” R/W R/W 6. Free registers These free registers are 1-byte SRAM type registers that can be set freely by users ...
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... It continues counting when initialization, instead of returning to “000000h”. At power-on, registers are cleared by the power-on detection circuit so that the up counter is cleared to “000000h”. If the power-on detection circuit does not operate successfully, the counter may start from the indefinite status. For successful operation of the power-on detection circuit, refer to “ ...
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... Figure 19 Alarm Expansion Register 1 and Alarm Expansion Register 2 To make the year data of alarm expansion register 1 valid, set A1YE to “1”. For the month data, set A1ME to “1”, for the day data, set A1DE to “1”. Set as well A2ME, A2YE, A2DE in the alarm expansion register 2. Regarding how to set the data of day of the week, hour, and minute, refer to “ ...
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... Hz clock pulse is output from the INT pin. When “1” is set in the POC flag, be sure to initialize. The POC flag is set to “0” due to initialization so that the 1 output of user-set frequency mode is cleared. (Refer to “ Register Status After Initialization ”.) For the regular operation of power-on detection circuit, the period to power-up the S-35399A03 is that the voltage reaches 1.3 V within 10 ms after setting the IC’ ...
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... Code + command : Output from S-35399A03 : Input from master device 20 00 (Y), 01 (M), 01 (D), 0 (day of the week), 00 (H), 00 (M), 00 (S) “ b” (In B6, B5, B4, the data of B6, B5 the status register 1 at initialization is set. Refer to Figure 21 .) “00h” “00h” “00h” “00h” ...
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... BLD flag is read, the BLD flag is automatically set to “0” to restart the sampling operation. If the BLD flag is “1” even after the power supply voltage is recovered, the internal circuit may be in the indefinite status. In this case, be sure to initialize the circuit. ...
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... In 24-hour expression, the AM able to read 11 23. *2. Processing of nonexistent data, regarding second data, is done by a carry pulse which is generated one sec after, after Write. At this point the carry pulse is sent to the minute-counter. 2. Correction of end-of-month A nonexistent day, such as February 30 and April 31, is set to the first day of the next month. ...
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... If setting the pin output to “H”, turn off the alarm function by setting “0” in INT1AE/INT2AE in the status register 2. To set the alarm time, set the data of day of the week, hour, minute in the INT1/INT2 register, set the data of year, month, day in the alarm expansion register Refer to “4. INT1 register and INT2 register” and “9. Alarm expansion register 1 and alarm expansion register 2” ...
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... If users clear INT1AE/INT2AE once; “L” is not output from the within a period when the alarm time matches real-time data. *2. If turning the alarm output on by changing the program, within the period when the alarm time matches real-time data, “L” is output again from the 2 ...
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... INT1 pin/INT2 pin "L" is output again if this period is within 7.9 ms *1. Pin output is set to “H” by disabling the output mode within 7.9 ms, because the signal of this procedure is maintained for 7.9 ms. Note that pin output is set to “L” by setting enable the output mode again. ...
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... However, in Read in the real-time data register, the procedure delays at max. 0.5 sec thus output “L” from the data register, some delay is made in the output period due to Write timing and the second-data during Write. (a) During normal operation ...
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... The minimum resolution is approx. 3 ppm (or approx. 1 ppm) and the S-35399A03 corrects in the range of − 195.3 to +192.2 ppm (or of − 65.1 to +64.1 ppm). (Refer to Table 14 .) Users can set up this function by using the clock-correction register. Regarding how to calculate the setting data, refer to “1. How to calculate” . When not using this function, be sure to set “ ...
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... Correction value Caution The figure range which can be corrected is that the calculated value is from 0 to 64. *1. Convert this value to be set in the clock correction register. For how to convert, refer to “ (a) Calculation example 1”. *2. Measurement value when 1 Hz clock pulse is output from the *3 ...
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... Rev.2.0 _00 2. Setting value for register and correction value Table 15 Setting Value for Register and Correction Value (Minimum Resolution: 3.052 ppm ( Table 16 Setting Value for Register and Correction Value (Minimum Resolution: 1.017 ppm ( Correction Value • • • • ...
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... How to confirm setting value for register and result of correction The S-35399A03 does not adjust the frequency of the crystal oscillation by using the clock-correction function. Therefore users cannot confirm corrected or not by measuring output 32.768 kHz. When the function to clock-correction is being used, the cycle clock pulse output from the Figure 31 ...
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... A clock pulse is a pulse that is output when the second-data in the real-time data is “00h”. Therefore, some delay is made in the period that a clock pulse is being output due to Write timing and Write data. The registers are not initialized unless power-on again, so that users are able to grasp the elapsed time from power- years. Figure 32 shows the example of timing chart of up counter’ ...
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... A start condition is when the SDA line changes “H” to “L” when the SCL line is in “H”, so that the access starts. 2. Stop condition A stop condition is when the SDA line changes “L” to “H” when the SCL line is in “H”, and the access stops, so that the S-35399A03 gets standby. ...
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... After detecting a start condition, the S-35399A03 receives device code and command. The S-35399A03 enters the Read-data mode by the Read/Write bit “1”. The data is output from B7 in 1-byte. Input an acknowledgment signal from the master device every moment that the S-35399A03 outputs 1-byte data. However, do not input an acknowledgment signal (input NO_ACK) for the last data-byte output from the master device ...
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... After detecting a start condition, S-35399A03 receives device code and command. The S-35399A03 enters the Write-data mode by the Read/Write bit “0”. Input data from 1-byte. The S-35399A03 outputs an acknowledgment signal (“L”) every moment that 1-byte data is input. After receiving the acknowledgment signal which is for the last byte-data, input a stop condition to the S-35399A03 to finish access ...
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... SDA command I/O mode switching *1. Set NO_ACK = 1 in Read. *2. Transmit ACK = 0 from the master device to the S-35399A03 in Read. (3) Status register 1 access and status register 2 access SCL SDA I/O mode switching * Status register 1 selected Status register 2 selected *2. Set NO_ACK = 1 in Read. ...
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... S-35399A03 (4) INT1 register access and INT2 register access In Read/Write the INT1 and INT2 registers, data varies depending on the setting of the status register 2. Be sure to Read/Write after setting the status register 2. When setting the alarm by using the status register 2, these registers work as 3-byte alarm time data registers, in other statuses, they work as 1-byte registers. When outputting the user-set frequency, they are the data registers to set up the frequency. Regarding details of each data, refer to “ ...
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... SDA I/O mode switching *1. Set NO_ACK = 1 in Read. (6) Free register 1 access SCL SDA I/O mode switching *1. Set NO_ACK = 1 in Read. (7) Up counter access Access to the up counter is Read-only. Users cannot Write in this counter with Write operation. 1 SCL SDA Code + command I/O mode switching ...
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... Free register 2 access and free register 3 access SCL SDA I/O mode switching Figure 47 Free Register 2 Access and Free Register 3 Access (9) Alarm expansion register 1 access and alarm expansion register 2 access Write in the alarm expansion register 1 (alarm expansion register 2) after setting the status register 2. 1 SCL ...
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... S-35399A03 does not operate the next procedure because the internal circuit keeps the state prior to interruption. The S-35399A03 does not have a reset pin so that users usually reset its internal circuit by inputting a stop condition. However, if the SDA line is outputting “L” (during output of acknowledgment signal or Read), the S-35399A03 does not accept a stop condition from the master device ...
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... Figure 50 shows the flowchart of initialization at power-on and an example of real-time data set-up. Regarding how to apply power, refer to “ Power-on Detection Circuit and Register Status” unnecessary for users to comply with this flowchart of real-time data strictly. And if using the default data at initializing also unnecessary to set up again. Read status register 1 (status register ...
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... S-35399A03 VSS XIN XOUT C g Caution 1. Because the I/O pin has no protective diode on the VDD side, the relation of V But pay careful attention to the specifications. 2. Start communication under stable condition after power-on the power supply in the system. VDD S-35399A03 VSS XIN ...
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... REAL-TIME CLOCK S-35399A03 Adjustment of Oscillation Frequency 1. Configuration of oscillator Since crystal oscillation is sensitive to external noise (the clock accuracy is affected), the following measures are essential for optimizing the oscillation configuration. (1) Place the S-35399A03, crystal oscillator, and external capacitor (C (2) Increase the insulation resistance between pins and the substrate wiring patterns of XIN and XOUT. ...
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... signal is not output, the power-on detection circuit does not operate normally. Turn off the power and then turn it on again. For how to apply power, refer to “ Power-on Detection Circuit and Register Status” . Remark If the error range is ± 1 ppm in relation to 1 Hz, the time is shifted by approximately 2.6 seconds per month (calculated using the following expression). ...
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... Adjust the rotation angle of the variable capacitance so that the capacitance value is slightly smaller than the center, and confirm the oscillation frequency and the center value of the variable capacitance. This is done in order to make the capacitance of the center value smaller than one half of the actual capacitance value because a smaller capacitance value increases the frequency variation. ...
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... Although the IC contains a static electricity protection circuit, static electricity or voltage that exceeds the limit of the protection circuit should not be applied. • Seiko Instruments Inc. assumes no responsibility for the way in which this IC is used in products created using this IC or for the specifications of that product, nor does Seiko Instruments Inc. assume any responsibility for any infringement of patents or copyrights by products that include this IC either in Japan or in other countries ...
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... V (3) Current consumption 3 (current consumption during communication) vs. Input clock characteristics ° 5 DD3 [μ 100 200 SCL [kHz] (5) Current consumption 1 (current consumption out of communication) vs. C characteristics ° 1.0 0.9 0.8 0.7 0.6 I DD1 0.5 [μA] 0 3.0 V 0.3 DD 0.2 0 (2) Current consumption 2 (current consumption when 32 ...
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... Oscillation frequency vs. Temperature characteristics Δf/f [ppm [V] DD (10) Output current characteristics OL1 [mA [pF] vs (12) Low power supply voltage detection voltage OUT OL2 release voltage, and time keeping power supply voltage (Min) vs. Temperature characteristics SDA pin ° 5 [ [V] Seiko Instruments Inc. 2-WIRE REAL-TIME CLOCK S-35399A03 pF ...
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... A condition that power-on detection works at turning on 1 ≤ condition that the IC works regularly and data is 2 retained during power voltage drop ≥ condition that the IC works regularly and data is 3 retained during power voltage rise ≥ − +85 ° Seiko Instruments Inc. ...
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... Seiko Instruments Inc. is strictly prohibited. • The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. ...