S-3513B S-3513B CMOS real-time clock which designed transfer each

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S-3513B S-3513B CMOS real-time clock which designed transfer each

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REAL-TIME CLOCK
S-3513B
S-3513B CMOS real-time clock which designed transfer each data clock calender requested CPU. This connected three signal buses. output supply signals another Because oscillating circuit S-3513B driven constant voltage, operates with power consumption.
Features
power consumption: typ. (VDD=3.0 Wide area operating voltage: input/output year, month, day, week, hour, minute second interface three wires Auto calender till year 2,099 (automatic leap year arithmetic feature included) Built-in power voltage detecting circuit Built-in constant voltage circuit Built-in flag generating circuit power on/off Uninterrupted clock signal output Built-in crystal oscillating circuit (internal external
Applications
Cellular phone variety pagers Camera
Package
8-pin SSOP (pin pitch 0.65 (Package drawing code FS008-A)
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B Block Diagram
XOUT
Rev.1.2_00
Oscillating circuit
Timing generation
F32K
Hour
week
Status register
Second
Minute
Month
Year
Power voltage detecting circuit Constant voltage circuit
Shift register
Serial Interface
Figure
Seiko Instruments Inc.
Rev.1.2_00 Product Code Structure
S-3513BE Package name (abbreviation) 8-Pin SSOP Description (fixed)
REAL-TIME CLOCK S-3513B
Assignment
8-pin SSOP view F32K XOUT Figure
Description Pins
Symbol F32K Table Description 32,768 clock signal output Because these signals output with interruption, command control these signals. Crystal oscillator connect (32,768 (Internal External Negative power supply (GND) Chip select input pin. During allows data input/output. allows data input. During Hi-Z state. input-disabled state. Serial clock input pin. input/output data from performed synchronization with this clock. However, clock accepted while "L." Serial data input/output pin. normally Hi-Z state while "L". When changes from "H," input pin. will input output pin, depending subsequently input command. Positive power supply pin. Configuration open drain output protective diode side VDD) CMOS input (Included pull-down resistance. protective diode side VDD)
XOUT
CMOS input protective diode side VDD)
open drain output protective diode side VDD) CMOS input
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B Absolute Maximum Ratings
Item Symbol Table Applicable pin, conditions Rating
Rev.1.2_00
Unit
Power voltage VSS-0.3 VSS+6.5 Input voltage Applied SCK, -0.3 +6.5 Output voltage VOUT Applied SIO, F32K -0.3 +6.5 Operating temperature Topr VDD=3.0 Storage temperature Tstg +125 Caution absolute maximum ratings rated values exceeding which product could suffer physical damage. These values must therefore exceeded under conditions.
Recommended Operating Conditions
Item Power voltage Operating temperature
Symbol
Table Condition
Min.
Typ.
Max.
Unit
Topr
Oscillation Characteristics
Table
(Unless otherwise specified Ta=25°C, VDD=3 DS-VT-200 (crystal oscillator, CL=6 32,768 manufactured Quartz Techno Ltd.)
Item Oscillation start voltage Oscillation start time IC-to-IC frequency diversity Frequency voltage diversity Input capacity Output capacity
Symbol VSTA TSTA
Condition Within seconds VDD=1.7 Applied Applied XOUT
Min.
Typ.
Max.
Unit ppm/V
Seiko Instruments Inc.
Rev.1.2_00 Electrical Characteristics
Table Item Operating voltage range Current consumption Current consumption Input leak current Input leak current Input current Input current Output leak current1 Output leak current2 Input voltage Input voltage Output current Output current Power voltage detection voltage Power voltage detection voltage Symbol IDD1 IDD2 IIZH IIZL IIL1 IIL2 IOZH IOZL IOL1 IOL2 VDET1 VDET2 characteristics Min. -0.5 -0.5 -0.5 -0.5
REAL-TIME CLOCK S-3513B
(Unless otherwise specified Ta=25°C, VDD=3 DS-VT-200 (crystal oscillator, CL=6 32,768 manufactured Quartz Techno Ltd.)
Applicable Condition +70°C During communications During communications (SCL=100 kHz) SCK, VIN=VDD SCK, VIN=VSS VIN=5.5 VIN=0.4 F32K, VOUT=VDD F32K, SIO, SCK, SIO, SCK, F32K VOUT=VSS VOUT=0.4 VOUT=0.4 Ta=+25°C +70°C
Typ.
Max.
Unit
1.72
Table Item Operating voltage range Current consumption Current consumption Input leak current Input leak current Input current Input current Output leak current1 Output leak current2 Input voltage Input voltage Output current Output current Power voltage detection voltage Power voltage detection voltage Symbol IDD1 IDD2 IIZH IIZL IIL1 IIL2 IOZH IOZL IOL1 IOL2 VDET1 VDET2
characteristics Min. -0.5 -0.5 -0.5 -0.5 1.72 Typ. Max. Unit
(Unless otherwise specified Ta=25°C, VDD=5 DS-VT-200 (crystal oscillator, CL=6 32,768 manufactured Quartz Techno Ltd.)
Applicable Condition +70°C During communications During communications (SCL=100 kHz) SCK, VIN=VDD SCK, F32K, F32K, SIO, SCK, SIO, SCK, F32K VIN=VSS VIN=5.5 VIN=0.4 VOUT=VDD VOUT=VSS VOUT=0.4 VOUT=0.4 Ta=+25°C +70°C
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B Electrical Characteristics
(S-3513B, RL=10 CL=80
Rev.1.2_00
Table
characteristics
Conditions VDD=1.7 70°C Input; VIH=0.8 VDD, VIL=0.2 VDD, Output; VOH=0.8 VCC, VOL=0.2 (VCC=5.0
Item Symbol Min. Typ. Max. Unit Clock pulse width tSCK 250000 Setup time before rising Hold time after rising tCSH Input data setup time tISU Input data hold time tIHO Output data definition time tACC Setup time before falling tCSS Hold time after falling Input rising/falling time Caution Since output form open-drain output, rising time tACC determined values load resistance (RL) load capacity (CL) outside this reference value. Table characteristics
Conditions VDD=3.0 70°C Input; VIH=0.8 VDD, VIL=0.2 VDD, Output; VOH=0.8 VCC, VOL=0.2 (VCC=5.0
Item Symbol Min. Typ. Max. Unit Clock pulse width tSCK 250000 Setup time before rising Hold time after rising tCSH Input data setup time tISU Input data hold time tIHO Output data definition time tACC Setup time before falling tCSS Hold time after falling Input rising/falling time 0.05 Caution Since output form open-drain output, rising time tACC determined values load resistance (RL) load capacity (CL) outside this reference value. Table characteristics
Conditions VDD=5.0 70°C Input; VIH=0.8 VDD, VIL=0.2 VDD, Output; VOH=0.8 VCC, VOL=0.2 (VCC=5.0
Item Symbol Min. Typ. Max. Unit Clock pulse width tSCK 250000 Setup time before rising Hold time after rising tCSH Input data setup time tISU Input data hold time tIHO Output data definition time tACC Setup time before falling tCSS Hold time after falling Input rising/falling time 0.05 Caution Since output form open-drain output, rising time tACC determined values load resistance (RL) load capacity (CL) outside this reference value.
Seiko Instruments Inc.
Rev.1.2_00 Timing Charts
tCSH
REAL-TIME CLOCK S-3513B
tCSS
Figure tISU tIHO tR,tF Figure
Input data
tSCK
tSCK
tACC
Output data
Figure
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B Description Operation
Rev.1.2_00
Serial interface S-3513B receives various commands 3-wire serial interface read/write data. This section covers transfer methods this product. Communication data configuration After turning "H", send 4-bit fixed code "0110" succeedingly transfer command 3-bit length read/write command 1-bit length.
Fixed code
Command
Read/Write
Figure
Communication data
Command configuration There types commands which read from write various registers. table below lists them. command that listed table provides operation. Table Command list Description
Reset (year), (month), (day), (day week), (minute), (second)) Status register access Real-time data access (year data Real-time data access (hour data Test mode start Test mode
Don't care this command. This command access-disabled specific test.
Caution enter command listed above table. Data reading When input data from synchronization with falling after turning "H", data included into inside S-3513B eighth rising clock state data reading reached when "1". state leads output data corresponding each command synchronization with falling subsequent clock input. Remark When number clocks less than eight, state clock waiting reached processing done. When clocks more than required, they processed order from first clocks other than those required ignored.
Seiko Instruments Inc.
Rev.1.2_00
REAL-TIME CLOCK S-3513B
Real-time data reading
TEST
Command
Year data Output mode switching
Second data Input mode switching
Real-time data reading
TEST
Command
Hour data Output mode switching
Second data Input mode switching
Status register reading
POWER
Command Output mode switching
Status data
Input mode switching
Figure Read communication
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B
Rev.1.2_00
Data writing When input data from synchronization with falling after turning "H", data included into inside S-3513B eighth rising clock state data writing reached when "0". state, data written registers according each command synchronization with falling subsequent clock input.
Real-time data writing
TEST
Command
Year data
Second data
Real-time data writing
TEST
Command
Hour data
Second data
Status register writing
POWER
Command
Status data
Figure Write communication
Seiko Instruments Inc.
Rev.1.2_00
Register configuration
REAL-TIME CLOCK S-3513B
Real-time data register real-time data register 56-bit register which stores code data year, month, day, week, hour, minute second. read/write operation performed real-time data access command sends receives data from first digit year data.
Year data Sets lower digits Christian links together with auto calender feature till 2,099. Month data
count value automatically changed auto calender feature: (leap year) (common year) data
week data septenary counter. that corresponds week.
Hour data AM/PM 12-hour expression, 0:AM 1:PM. 24-hour expression, this flag meaning either must written.
Minute data
TEST
Second data test flag TEST Turns during test mode.
Figure
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B
Rev.1.2_00
Status register status register, which 8-bit register, used display modes. POWER flag dedicated read operations.
POWER 12/24
Figure B7:POWER This flag turns power voltage detecting circuit operates during power-on changes power voltage (below VDET). Once turning "1," this flag does turns back even when power voltage reaches exceeds detection voltage. When flag "1", must send reset command status register read command), turn "0." read-only flag. This flag used 12-hour 24-hour expression. 12-hour expression 24-hour expression These bits used user memory bits. They have effect timer function. These bits ignored when data been written them. When data read from them, undetermined.
B6:12/24
Test flag test flag 1-bit register which assigned second data real-time data register. transferred data considered test mode starting command receiving test mode starting command noises, set. When set, must send test mode ending command reset command. Initialization Note that S-3513B different initializing operations, depending states. When power turned When power turned status register "82h" register "8000h." other words, (POWER flag) status register. normal use, make sure send reset command when turning power. Real-time data register (year), (month), (day), (day week), (hour), (minute), (second) Status register "82h" When power voltage detecting circuits operates power voltage detecting circuit included S-3513B operates sets (POWER flag) internal status register when power turned power voltage reduced. Once set, held even after power voltage gets equal higher than detection voltage, i.e., power voltage detector threshold. When flag "1", must send reset command from initialize flag. this point, other registers does change. However, POWER flag during power-on reset (S-3513B does reach indefinite area during backup), have send reset command.
Seiko Instruments Inc.
Rev.1.2_00
REAL-TIME CLOCK S-3513B
When reset command received When reset command received, each register turns follows: Real-time data register (year), (month), (day), (day week), (hour), (minute), (second) Status register "00h"
POWER flag command data command Don't care status read command status data reset command
LINE
POWER flag
backup state (S-3513B does reach indefinite area)
POWER flag command data command
LINE
down
POWER flag
status read command
status data
real-time data read command
Figure
Initializing
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B
Processing none-existent data end-of-month
Rev.1.2_00
When writing real-time data, validate treat invalid data end-of-month correction. [None-existent data processing] Table Register Normal data Error data Result Year data Month data data week data Hour data (24-hour) (12-hour) Minute data Second data 12-hour expression, write AM/PM flag. AM/PM flag ignored 24-hour expression, o'clock o'clock read read operation. None-existent data processing second data performed carry pulse second after writing. this point, carry pulse sent minute counter. [End-of-month correction] none-existent corrected first next month. example, February changed March Leap-year correction also performed here.
Seiko Instruments Inc.
Rev.1.2_00
Power voltage detecting circuit
REAL-TIME CLOCK S-3513B
S-3513B internal power voltage detecting circuit. This circuit gives sampling movement only 15.6 once second. power voltage decreases below detection voltage (VDET), latch circuit latches level, sampling movement stops. Only when subsequent communication status read command, output latch circuit transferred sift register sampling movement resumed. Decrease power voltage monitored reading POWER flag. That say, once decrease power voltage detected, detecting operation performed held unless perform initialization send status read command. Caution When power voltage increased first read operation performed after decrease power voltage occurs latch circuit latches "H", read POWER flag, however, next read operation performed after sampling detecting circuit, POWER flag reset since sampling subsequently allowed. timing diagram below.
VDET
Communication Sampling pulse Stop Stop Stop
Latch circuit output
POWER flag VDET
Communication Sampling pulse Stop Stop Stop Stop
Latch circuit output POWER flag
[Timing sampling pulse]
Carry pulse Latch timing Sampling pulse 15.6
Carry-up timing
Figure
Timing power voltage detecting circuit
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B
Example software treatment Initialization flow power-on START
Rev.1.2_00
Power
S-3513B back-up power turned only side, reset command does need transferring. conditions good (e.g., noise) probable changes commands occurs serial communications, recommended make sure TEST flag. test ending command used lternately.
POWER=1 Reset command transfer
TEST=1 Reset command transfer
Status register setting command transfer Real-time data setting command transfer
Figure
Initialization flow
Seiko Instruments Inc.
Rev.1.2_00 Samples Application Circuits
S-3513BEFS F32K External XOUT
REAL-TIME CLOCK S-3513B
System power
with protective diode side, relation VCCVDD problem give great care standard. Make communications after system power turned stable state obtained. Figure Application circuit
Power switching circuit S-3513BEFS F32K External XOUT
System power
Make communications after system power turned stable state obtained. Figure Caution Application circuit
applied circuits above guarantee proper operation. Evaluate actual application determine correct constants.
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B Adjustment Oscillating Frequency
Configuration oscillating circuit
Rev.1.2_00
Since crystal oscillation sensitive external noises (clock accuracy affected), following measures essential optimizing your oscillating circuit configuration: Place S-3513B, crystal oscillator external capacitor (Cg) close each other possible. Make high insulation resistance between pins substrate wiring patterns XOUT. place signal power lines close oscillating circuit.
XOUT Crystal oscillator:32,768 CL=6 Cg=3
Oscillating circuit internal constant standard values: Rf=20 Rd=220 Cd=12
S-3513B
Figure Connection diagram
Seiko Instruments Inc.
Rev.1.2_00
Measurement oscillating frequencies
REAL-TIME CLOCK S-3513B
Referring circuit configuration Figure turn power measure oscillating frequencies with frequency counter. Remark error range relation 32,768 time shifts about seconds month calculated using following expression). ppm) seconds minutes hours days seconds/month
XOUT
F32K Open
Frequency counter
S-3513B
Figure Caution
Connection diagram
high-accuracy frequency counter order). 32,768 signal output uninterruptedly. Determine with frequency slow/fast range property referred.
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B
Adjustment oscillating frequencies
Rev.1.2_00
Matching crystal oscillator with nominal frequency must performed with parasitic capacitance board included. Select crystal oscillator optimize value accordance with flow chart below.
START
Select crystal oscillator.
Variable capacity <Trimer capacitor> <Fixed capacitor> center variable capacitor.
specification
Does frequency match
optimal value
Change
Make fine adjustment frequency variable capacity.
Figure
Crystal oscillator setting flow
making matching adjustment with crystal, contact appropriate crystal maker determine value (load capacity) value (equivalent serial resistance). value value Typ. recommended values. value selection must performed actual since parasitic capacitance affects Select value range from frequency does match, change value crystal. Adjust rotation angle variable capacity that capacity value somewhat smaller than center, confirm oscillating frequency center value variable capacity. This done order make capacity center value smaller than half actual capacity value because smaller capacity value makes greater quantity changes frequency. frequency does match, change value crystal. Caution Oscillating frequencies changed ambient temperature power voltage. Refer property samples. crystal oscillator operates slower higher lower ambient temperature than 25°C. Therefore, recommended adjust oscillator operate somewhat faster normal temperature.
Seiko Instruments Inc.
Rev.1.2_00 Precautions
REAL-TIME CLOCK S-3513B
apply electrostatic discharge this that exceeds performance ratings ofthe built-in electrostatic protection circuit. claims responsibility disputes arising connection with infringement products including this patents owned third party.
Seiko Instruments Inc.
REAL-TIME CLOCK S-3513B Characteristics (Reference Data)
Standby current IDD1 [µA] VDD=3 [pF] Operating drain current Input clock Ta=25°C VDD=5 IDD1 [µA] Ta=25°C Standby current
Rev.1.2_00
Ta=25°C
Standby current temperature VDD=5
IDD2 [µA]
VDD=5
IDD1 [µA]
VDD=3
VDD=3 frequency Oscillating frequency [ppm] [pF] VDD=3 VDD=5 [ppm] Ta=25°C 1,000 [°C] Oscillating frequency Ta=25°C
Seiko Instruments Inc.
Rev.1.2_00
Oscillating frequency temperature Ta=25°C, VDD=3
REAL-TIME CLOCK S-3513B
Oscillation start time VDD=5 Ta=25°C
[ppm] -120 -160 [°C] Output current (VOUT IOL1) F32K pins, Ta=25°C VDD=5 IOL1 [mA] VDD=3 IOL2 [mA] TSTA [mS]
VDD=3
[pF] (10) Output current (VOUT IOL2) pin, Ta=25°C VDD=5
VDD=3
VOUT
VOUT
Seiko Instruments Inc.
3.1±0.3
0.15 -0.05
+0.1
0.22±0.1 0.65
FS008-A-P-SD-1.1
TITLE SCALE UNIT
SSOP8-A-PKG Dimensions FS008-A-P-SD-1.1
Seiko Instruments Inc.
1.55±0.05
4.0±0.1
2.0±0.05
0.3±0.05
8.0±0.1
1.55±0.05
1.4±0.1
(4.0)
6.9±0.1
Feed direction
FS008-A-C-SD-1.1
TITLE SCALE UNIT
SSOP8-A-Carrier Tape FS008-A-C-SD-1.1
Seiko Instruments Inc.
13.5±0.5
Enlarged drawing central part
2±0.5 13±0.2
2±0.5
21±0.8
FS008-A-R-SD-1.1
TITLE SCALE UNIT
SSOP8-A-Reel FS008-A-R-SD-1.1
QTY. 2,000
Seiko Instruments Inc.
information described herein subject change without notice. Seiko Instruments Inc. responsible problems caused circuits diagrams described herein whose related industrial properties, patents, other rights belong third parties. application circuit examples explain typical applications products, guarantee success specific mass-production design. When products described herein regulated products subject Wassenaar Arrangement other agreements, they exported without authorization from appropriate governmental authority. information described herein other purposes and/or reproduction copying without express permission Seiko Instruments Inc. strictly prohibited. products described herein cannot used part device equipment affecting human body, such exercise equipment, medical equipment, security systems, equipment, apparatus installed airplanes other vehicles, without prior written permission Seiko Instruments Inc. Although Seiko Instruments Inc. exerts greatest possible effort ensure high quality reliability, failure malfunction semiconductor products occur. user these products should therefore give thorough consideration safety design, including redundancy, fire-prevention measures, malfunction prevention, prevent accidents, fires, community damage that ensue.

S-3513B S-3513B CMOS real-time clock which designed transfer each

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