s-35199a01 Seiko Instruments Inc., s-35199a01 Datasheet
s-35199a01
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s-35199a01 Summary of contents
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... REAL-TIME CLOCK The S-35199A01 is a CMOS 3-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 µ ...
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... REAL-TIME CLOCK S-35199A01 Pin Configuration Marking Specifications List of Pin Pin No. Symbol A1 VSS GND pin B1 XIN Connection pin for crystal oscillator C1 XOUT Power supply pin for FOUT D1 VDDL output A2 SIO I/O pin for serial data B2 CTRL Control pin for F32K output C2 Output pin for interrupt signal ...
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... SCK pin. The status is in high impedance when the CS pin is in “L” or open, so that the S-35199A01 does not transmit data. Setting the CS pin to “H” level from “L” or open, this SIO pin goes in the input status so that it receives the command data. This pin has CMOS input and Nch open drain output. • ...
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... REAL-TIME CLOCK S-35199A01 Equivalent Circuits of I/O Pin SCK Figure 3 SCK pin CS, CTRL Figure 5 CS pin, CTRL pin Figure 7 FOUT pin and VDDL pin 4 SIO INT, F32K VDDL FOUT Seiko Instruments Inc. Rev.1.0 Figure 4 SIO pin Figure 6 INT pin, F32K pin _00 ...
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... Day week Real-time data register Comparator 2 Alarm expansion register 2 INT register 2 INT controller 2 Shift register Power-on detector Figure 8 Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 32.768 kHz controller register 1 Month Year Serial interface CTRL F32K VDDL FOUT INT SIO SCK CS VSS ...
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... REAL-TIME CLOCK S-35199A01 Absolute Maximum Ratings Parameter Power supply voltage 1 V Power supply voltage 2 V Input voltage V Output voltage 1 V Output voltage 2 V Operating ambient T *1 temperature Storage temperature T *1. Conditions with no condensation or frost. Condensation and frost cause short circuiting between pins, resulting in a malfunction ...
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... V − DD − 0.3 − 0 − − 1.5 0.65 1 S-35199A01 Max. Unit µ A 0.97 µ A 1.47 µ µ A 0.5 µ A 0.5 16 µ A µ A 300 − µ A µ A 0.5 µ 0.2 × − ...
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... REAL-TIME CLOCK S-35199A01 (Ta = −40 to +85°C, V Parameter Symbol Current I DD1 consumption 1 Current I DD2 consumption 2 Current I DD3 consumption 3 Input current I IZH leakage 1 Input current I IZL leakage 2 Input current 1 I IH1 Input current 2 I IH2 Input current 3 I IH3 Output current I OZH ...
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... outside the IC. Therefore, use this value only as a reference value. L Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 kΩ SIO Remark The power supplies of the IC and load have the same electrical potential. Figure 9 Output Load Circuit (Ta = − ...
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... REAL-TIME CLOCK S-35199A01 CSH SCK t DS SIO Figure 10 Timing Diagram 1 during 3-wire Communication Input data Figure 11 Timing Diagram 2 during 3-wire Communication Output data Figure 12 Timing Diagram 3 during 3-wire Communication 10 t ISU SCK 20% 80% 20 SCK SCK ...
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... SII S-35190A/192A as software. Regarding details, refer to “2. Configuration of command” Code Command 1 1 0/1 C2 1-byte data Figure 13 Data Communication Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK Serial Interface”. Code Read/Write bit S-35199A01 11 ...
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... REAL-TIME CLOCK S-35199A01 2. Configuration of command 13 types of command are available for the S-35199A01, The S-35199A01 does Read/Write the various registers by inputting these codes and commands. The S-35199A01 does not perform any operation with any codes and commands other than those below. Command Code ...
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... Start bit of real-time data 2 data access H10 H20 m10 m20 s10 s20 Figure 14 Real-time Data Register Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 Y40 Y80 m40 0 B0 s40 ...
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... REAL-TIME CLOCK S-35199A01 Year data (00 to 99): Y1, Y2, Y4, Y8, Y10, Y20, Y40, Y80 Sets the lower two digits in the Western calendar year (00 to 99) and links together with the auto calendar function until 2099. Example: 2053 (Y1, Y2, Y4, Y8, Y10, Y20, Y40, Y80 ...
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... B4 B3 INT1 SC0 SC1 R R/W R R/W Figure 15 Status Register more. This flag is Read-only. When this flag is “1”, be sure DET Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 INT2 BLD POC Read Write : Read/Write DET Low Power Supply ) or less. Users 15 ...
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... REAL-TIME CLOCK S-35199A01 3. Status Register 2 Status register 1-byte register that is used to display and set various modes. The bit configuration is shown below INT1FE INT1ME 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”. ...
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... Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK H10 m10 m20 m40 − − − − S-35199A01 0 0 A2WE B0 AM/ H20 A2HE PM B0 A2mE B0 17 ...
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... REAL-TIME CLOCK S-35199A01 (2) Output of user-set frequency The INT register 1-byte data register 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. SC4 to SC6 is 3-bit SRAM type registers that can be freely set by users ...
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... The free register is a 1-byte SRAM type register that can be set freely by users R/W R R/W R/W R/W Figure 20 Clock-Correction Register R/W R/W R/W Figure 21 Free Register Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 R/W R/W R/W R/W: Read/Write R/W R/W R/W R/W: Read/Write 19 ...
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... REAL-TIME CLOCK S-35199A01 7. Up counter The up counter is a 24-bit Read-only register. It starts binary counting from “000000h” from power-on and continues counting as long as power is being applied. It continues counting when initialization, instead of returning to “000000h”. At power-on, registers are cleared by the power-on detector so that the up counter is cleared to “000000h”. If the power-on detector does not operate successfully, the counter may start from the indefinite status. For successful operation of the power-on detector, refer to “ ...
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... Figure 23 FOUT Setting Register R/W R/W R/W Figure 24 FOUT Setting Register ≤ Set V DDL DDL DD Figure 25 Example of output of clock pulse Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 kHz 16 kHz 32 kHz R/W R/W R/W R/W: Read/Write 128 Hz R/W R/W R/W R/W: Read/Write ...
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... REAL-TIME CLOCK S-35199A01 9. Alarm expansion register 1 and alarm expansion register 2 The alarm expansion register 1 and 2 are 3-byte registers. They are expansion registers for the INT register 1 and 2 which output alarm interrupt. Users are able to set the alarm time; the data of year, month, day. The configuration of register is expressed by BCD code as well as the data register of year, month, day in the real-time register ...
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... Register Status After Initialization ”.) For the regular operation of power-on detection circuit, the period to power-up the S-35199A01 is that the voltage reaches 1.3 V within 10 ms after setting the IC’s power supply voltage When the power-on detection circuit is not working normally is ...
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... REAL-TIME CLOCK S-35199A01 Register Status After Initialization The status of each register after initialization is as follows. Real-time data register : Status register 1 : Status register 2 : INT register 1 : INT register 2 : Clock correction register : Free register : Up counter : FOUT setting register 1 : FOUT setting register 2 : Alarm expansion register 1 : ...
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... Low Power Supply Voltage Detection Circuit The S-35199A01 has a low power supply voltage detection circuit, so that users can monitor drops in the power supply voltage by reading the BLD flag (B1 in the status register 1). There is a hysteresis width of approx. 0.15 V (Typ.) between detection voltage and release voltage (refer to “ ...
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... REAL-TIME CLOCK S-35199A01 Correction of Nonexistent Data and End-of-Month When users write the real-time data, the S-35199A01 checks it. In case that the data is invalid, the S-35199A01 does the following procedures. 1. Processing of nonexistent data Register Year data Month data Day data ...
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... Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK INT register x alarm enable flag • AxHE = AxmE = AxWE = "1" Alarm expansion register x alarm enable flag • AxYE = AxME = AxDE = "1" Alarm interrupt Month Year Change by program *1 S-35199A01 27 ...
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... REAL-TIME CLOCK S-35199A01 Alarm setting of “H (hour)” Status register 2 setting • Alarm 1 interrupt 32kE = 0, INT1ME = INT1FE = 0 • Alarm 2 interrupt None Y (year), M (month), D (day), W (day of week) (H − Real-time data Change by program INT1AE/INT2AE Alarm time matches INT pin *1. If Users clear INT1AE/INT2AE once ...
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... Figure 35 Timing of Minute-periodical Interrupt Output 1 Change by program Minute-carry processing OFF *1 Change by program (OFF) Minute-carry Minute-carry processing processing Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 . Minute-carry Minute-carry processing processing ...
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... REAL-TIME CLOCK S-35199A01 5. Minute-periodical interrupt output 2 The output of minute-periodical interrupt 2 is the function to output “L”, for 7.9 ms, from the INT pin, synchronizing with the first minute-carry processing after selecting the output mode. However, in Read in the real-time data register, the procedure delays at max. 0.5 sec thus output “L” from the INT pin also delays at max. 0.5 sec. In Write in the real-time data register, some delay is made in the output period due to Write timing and the second-data during Write ...
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... Rev.1.0 _00 6. Operation of power-on detection circuit When power is applied to the S-35199A01, the power-on detection operates to set “1” in the POC flag (B0 in the status register 1 clock pulse is output from the INT pin. Status register 2 setting • INT1AE = INT1ME = 0, 32kE = 0 ...
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... REAL-TIME CLOCK S-35199A01 1. How to calculate (1) If current oscillation frequency > target frequency (in case the clock is fast 128 − Integral value 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” ...
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... Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 Correction Value Rate [ppm] [s/day] 192.3 16.61 189.2 16.35 186.2 16.09 • • • • • • 6.1 0.53 3.1 0. − 3.1 − 0.26 − 6.1 − 0.53 − 9.2 − ...
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... S-35199A01 3. How to confirm setting value for register and result of correction The S-35199A01 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 INT pin changes once in 20 times or 60 times, as shown in Figure 38 ...
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... Output Pin The S-35199A01 outputs a 32.768 kHz clock pulse from the INT , F32K, and FOUT pins. However, do not output 32.768 kHz from these three pins simultaneously because stability of the crystal oscillator is affected. When using the function to clock-correction or adjusting the oscillation frequency, measure the oscillation frequency under the usage conditions ...
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... REAL-TIME CLOCK S-35199A01 Serial Interface The S-35199A01 receives various commands via a 3-wire serial interface to Read/Write data. Regarding transmission is as follows. 1. Data Read When data is input from the SIO pin in synchronization with the falling of the SCK clock after setting the CS pin to “H”, the data is loaded internally in synchronization with the next rising of the SCK clock ...
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... During reading: Output mode switching Figure 42 Real-Time Data Access Code + Status data command Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK Second data During reading: Input mode switching 16 B0 During reading: Input mode switching S-35199A01 37 ...
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... REAL-TIME CLOCK S-35199A01 (4) INT register 1 access and INT register 2 access In Read/Write the INT register 1, data varies depending on the setting of the status register 2. Be sure to Read/Write the INT register 1 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 ...
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... Figure 46 Clock Correction Register Access Code + Free register data command Figure 47 Free Register Access Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 16 B0 During reading: Input mode switching 16 B0 During reading: Input mode switching 39 ...
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... REAL-TIME CLOCK S-35199A01 (7) Up counter access Access to the up counter is Read-only. Users cannot Write in this counter with Write operation SCK SIO Code + command (8) FOUT setting register 1 access and FOUT setting register 2 access CS SCK SIO Figure 49 FOUT Setting Register 1 Access and FOUT Setting Register 2 Access ...
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... Alarm expansion register 2 access Figure 50 Alarm Expansion Register 1 Access and Alarm Expansion Register 2 Access Month data Year data During reading: Output mode switching Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK Day data During reading: Input mode switching S-35199A01 41 ...
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... REAL-TIME CLOCK S-35199A01 Flowchart of Initialization at Power-on and Example of Real-time Data Set-up Figure 51 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 ...
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... FOUT F32K Figure 52 Application Circuit Ω INT Ω SIO SCK CTR L FOUT F32K Figure 53 Application Circuit 2 Seiko Instruments Inc. 3-WIRE REAL-TIME CLOCK S-35199A01 V CC System power supply VCC CPU VSS ≥ possible System power supply VCC CPU ...
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... Increase the insulation resistance between pins and the substrate wiring patterns of XIN and XOUT. (3) Do not place any signal or power lines close to the oscillator. (4) Locating the GND layer immediately below the oscillator is recommended. (5) Locate the bypass capacitor adjacent to the power supply pin of the S-35199A01. Parasitic capacitance C C Crystal oscillator: 32.768 kHz *1 C ...
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... Rev.1.0 _00 2. Measurement of oscillation frequency When the S-35199A01 is turned on, the internal power-on detector operates and a signal output from the INT pin to select the crystal oscillator and optimize the C counter following the circuit configuration shown in Figure signal is not output, the power-on detector does not operate normally. Turn off the power and then turn it on again. For how to apply power, refer to “ ...
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... REAL-TIME CLOCK S-35199A01 3. Adjustment of oscillation frequency (1) Adjustment by setting C Matching of the crystal oscillator with the nominal frequency must be performed with the stray capacitance on the board included. Select a crystal oscillator and optimize the C Fixed capacitor Request a crystal manufacturer for matching evaluation between the IC and a crystal. The recommended crystal characteristic values are Ω ...
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... Rev.1.0 _00 Product Name Structure S-35199A01 - HRT1 Precautions • 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 ...
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... REAL-TIME CLOCK S-35199A01 Characteristics (Typical Data) (1) Current consumption 1 (current consumption out of communication) vs. V characteristics ° 1.0 0.8 0.6 I DD1 [µA] 0.4 0 (3) Current consumption 3 (current consumption during communication) vs. Input clock characteristics ° 100 5 DD3 [µ ...
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... OL1 20 [mA 3 [V] OUT FOUT pin ° −0.5 −1.0 −1 5 [mA] −2.0 −2.5 −3.0 −3.5 0 0.1 0.2 0.3 V −V [V] DD OUT S-35199A01 OUT OL1 = 0.4 0.5 0.6 49 ...
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... REAL-TIME CLOCK S-35199A01 (13) Input current characteristics pin, CTRL pin ° C 700 600 500 400 I IH [µA] 300 200 100 vs (14) Low power supply voltage detection voltage and 5 3 [V] IN Seiko Instruments Inc. ...
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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of 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 ...