S-3511AEFS-TB Seiko, S-3511AEFS-TB Datasheet
S-3511AEFS-TB
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S-3511AEFS-TB Summary of contents
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... REAL-TIME CLOCK Features • Low current consumption • Wide operating voltage range : 1 5.5 V • BCD I/O of second, minute, hour, day, date, month and year • Interface to CPU with 3 lines • Built-in automatic calendar, automatic leap-year calculation up to 2099 • Built-in voltage detector • ...
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... XOUT Status register Power voltage VDD detecting circuit Constant voltage circuit VSS 2 Timing INT Register generation Comparator Second Minute Shift register Figure 1 Seiko Instruments Inc. Rev. 1.4 Clock generating circuit Day of Hour Day Year Month week Serial Interface _00 INT SIO CS SCK ...
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... Rev. 1.4 _00 Product Code Structure − S-3511AE xx I Pin Assignment (1) Package S-3511AEFS S-3511AEFJ TB IC direction in tape specifications Package name (abbreviation 8-Pin SSOP FJ : 8-Pin SOP CA : Die Description (fixed) 8-Pin SSOP Top view INT 1 8 XIN 2 7 XOUT 3 6 VSS 4 5 8-Pin SOP ...
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... XOUT VSS 4 INT XIN 0 XOUT S-3511A VSS 2.10 × 1.60 mm Die size : Sizes shown are for design purposes only. The corners of the die shrink by approximately 30 µm after dicing. 100 × 100 µm Pad size: X-Coordinate Y-Coordinate −890 641 −890 351 −890 −114 −890 − ...
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... Serial data input/output pin normally in the Hi-Z state while the CS pin is “L”. When the CS pin changes from “L” to “H”, the SIO pin is set to an input pin. It will be set to an input or output pin, depending on an subsequently input command. Positive power supply pin. ...
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... Item Power voltage Input voltage Output voltage Operating temperature Storage temperature Caution The absolute maximum ratings are rated values exceeding which the product couldsuffer physical damage. These values must therefore not be exceeded under any conditions. Recommended Operating Conditions Item Power voltage ...
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... DD − − 0.2×V 1.5 2 1.8 2.0 − 1.72 =6 pF, 32,768 Hz) manufactured by SII Quartz Techno Ltd.) L Min. Typ. 1.7 3.0 − 1.6 − 12 −0.5 − −0.5 − 100 175 −0.5 − DD −0.5 − SS − 0.8×V DD − ...
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... Input data hold time Output data definition time Setup time before CS falling Hold time after CS falling Input rising/falling time Caution Since the output form of the SIO pin is Nch open-drain output, the rising time determined by the values of load resistance (R ACC (C ) outside the IC. Use this as a reference value. ...
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... CSH SCK t DS SIO SCK Input data SCK Output data Figure 4 t ISU t R 80% 20% t IHO 80% 20 Figure SCK SCK 50% 50% 20% t ACC 80% 20% Figure 6 Seiko Instruments Inc. REAL-TIME CLOCK S-3511A CSS 80% 20% 9 ...
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... When you input data from the SIO pin in synchronization with the falling of the SCK pin after turning the CS pin to "H", the data is included into the inside of S-3511A at the eighth rising of the SCK clock and the state of data reading is reached when the R/W bit has "1". The state leads to output of data corresponding each command in synchronization with the falling of subsequent SCK clock input ...
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... Command Year data 2) Real-time data reading SCK SIO MSB LSB LSB Command Hour data (3) Status register reading SCK SIO MSB LSB LSB Command Status data Output mode switching MSB LSB ...
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... CS pin to "H", the data is included into the inside of S-3511A at the eighth rising of the SCK clock and the state of data writing is reached when the R/W bit has "0". In the state, the data is written to registers according each command in synchronization with the falling of subsequent SCK clock input ...
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... The real-time data register is a 56-bit register which stores the BCD code of the data of year, month, day, day of week, hour, minute and second. Any read/write operation performed by the real- time data access command sends or receives the data from LSB on the first digit of the year data. Y80 ...
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... REAL-TIME CLOCK S-3511A 2.2 Status register The status register is an 8-bit register which allows you to display and set various modes. The POWER flag is read-only and others are read/write-enabled MSB POWER 12/24 R R/W B7:POWER B6:12/24 B5:INTAE B3:INTME B1:INTFE B4,B2 and B0 INTME INTAE R/W R/W Figure 11 This flag turns to "1" if the power voltage detecting circuit operates during power-on or changes in power voltage (below V flag does not turns back to " ...
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... INT register is considered as alarm time data. Having the same configuration as the time and minutes registers of real-time data register configuration, they represent hours and minutes with BCD codes. When setting them, do not set any none-existent day. Data to be set must be in accordance with 12-hour or 24-hour expression that is set at the status register. ...
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... The test flag is a 1-bit register which is assigned to MSB of the second data of the real-time data register. If transferred data is considered as the test mode starting command due to the receiving of the test mode starting command or noises, "1" is set. When "1" is set, you must send the test mode ending command or reset command. ...
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... Rev. 1.4 _00 3.3 When the reset command is received When the reset command is received, each register turns as follows: Real-time data register : 00 (year), 01 (month), 01 (day), 0 (day of week), 00 (hour), 00 Status register INT register V DD POWER flag 0 SIO LINE backup state (S-3511A does not reach any indefinite area) ...
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... March 1. Leap-year correction is also performed here. 5. Interrupt There are five types of output format from the INT pin, which are selected by the INTAE, INTME and INTFE bits of the status register. (1) Alarm interrupt output Alarm interrupt is enabled by setting hour and minute data to the INT register and turning the status register's INTAE to " ...
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... When a first minute carry is performed after the status register's INTME and INTFE are set with "1", clock is output from the INT pin with a period of one minute (50 % duty). When you perform disable or enable communication while the INT pin is at "L", "L" signal is output from the INT pin again ...
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... Minute-carry processing INTAE=INTFE=0 INT pin (4) Per-minute steady interrupt output Minute-carry INTFE,INTME processing INTAE=0 INT pin 30 s “L” signal is output again in case less. (5) During power-on detecting circuit operation INTFE INTAE=INTME=0 INT pin 20 Change by program Alarm time corresponds OFF Change by program ...
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... Only when subsequent communication is of the status read command, the output of the latch circuit is transferred to the sift register and the sampling movement is resumed. Decrease in power voltage can be monitored by reading the POWER flag. That is to say, once decrease in power voltage is detected, any detecting operation is not performed and " ...
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... Real-time data setting command transfer INT register setting command transfer END 22 *1. If S-3511A is back-up and power is turned on only on the CPU side, the reset command does not need transferring. *2. If conditions are no good (e.g., noise) and probable changes in commands occurs via serial communications recommended to make sure the TEST flag ...
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... VDD VSS XIN XOUT C g Due to the I/O pin with no protective diode on the VDD side, the relation of VCC≥VDD has no problem. But give great care to the standard. Make communications after the system power is turned on and a stable state is obtained. S-3511AEFS VDD VSS XIN ...
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... Place S-3511A, crystal oscillator and external capacitor ( C (2) Make high 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 oscillating circuit. ...
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... Hz from the INT pin to select the crystal oscillator and optimize the C and measure the signal with a frequency counter following the circuit configuration shown in Figure 22. Remark If the error range is ±1 ppm in relation to 1 Hz, time is shifted by approximately 2.6 seconds a month (as calculated using the following expression). ...
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... This is done in order to make the capacity of the center value smaller than one half of the actual capacity value because a smaller capacity value makes a greater quantity of changes in a frequency. If the frequency does not match, change the C Caution 1 ...
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... Do not apply an electrostatic discharge to this IC that exceeds the performance ratings ofthe built-in electrostatic protection circuit. • SII claims no responsibility for any disputes arising out connection with any infringement by products including this IC of patents owned by a third party. Seiko Instruments Inc. ...
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... S-3511A Characteristics (Reference Data) (1) Standby current vs 1.5 I DD1 1 [µ 0 [pF] g (3) Operating drain current vs. Input clock 150 100 = DD2 [µ 400 SCK frequency [kHz] (5) Oscillating frequency vs ∆f/f 40 [ppm] ...
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... STA [mS] 50 100 vs OL1 = OL2 [mA Seiko Instruments Inc. REAL-TIME CLOCK (8) Oscillation start time vs. C Ta=25°C 800 600 400 200 = [pF] g (10) Output current 2 (V vs. I OUT SIO pins, Ta=25°C ...
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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 ...