PDF S-35399A02 Data sheet ( Hoja de datos )

Número de pieza	S-35399A02
Descripción	2-WIRE REAL-TIME CLOCK
Fabricantes	Seiko
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No Preview Available ! S-35399A02 www.sii-ic.com © Seiko Instruments Inc., 2007-2010 2-WIRE REAL-TIME CLOCK Rev.2.0_00 The S-35399A02 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 is 1.3 V to 5.5 V so 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’s backup memory. Users always can take back the information in the registers which is stored before power-off the main power supply, after the voltage is restored. This IC has the function to correct advance/delay of the clock data speed, in the wide range, which is caused by the oscillation circuit’s frequency deviation. Correcting according to the temperature change by combining this function and a temperature sensor, it is possible to make a high precise clock function which is not affected by the ambient temperature. This IC has the function for the external microcomputer’s sub clock to output the 32.768 kHz clock pulse. And for this output, users can select either of Nch open drain or CMOS. Moreover, this IC has a 24-bit binary up counter. This counter counts up every 60 sec from power-on so that users are able to grasp the elapsed time from power-on up to 30 years. Features • Low current consumption : 0.34 μA typ. (VDD = 3.0 V, Ta = 25°C) • Wide range of operating voltage : 1.3 to 5.5 V • Built-in clock-correction function • Clock pulse output (CMOS output, function to select frequency) • 32.768 kHz clock pulse output (Nch open-drain, output control pin) • Built-in 24-bit binary up counter • Built-in free user register • 2-wire (I2C-bus) CPU interface • Built-in alarm interrupter • Built-in flag generator during detection of low power voltage or at power-on • Auto calendar up to the year 2099, automatic leap year calculation function • Built-in constant voltage circuit • Built-in 32.768 kHz crystal oscillator (Cd built in, Cg external) • Lead-free, halogen-free Applications • Mobile game devices • Mobile AV devices • Digital still cameras • Digital video cameras • Electronic power meters • DVD recorders • TVs, VCRs • Mobile phones, PHS • Car navigation Package • WLP-12A Seiko Instruments Inc. 1 1 page Rev.2.0_00 Block Diagram XIN XOUT Oscillator Divider, timing generator Clock correction register Status register 1 Status register 2 FOUT setting register 1 FOUT setting register 2 Free register 24-bit binary up counter Low power VDD supply voltage detector Constant- voltage circuit 2-WIRE REAL-TIME CLOCK S-35399A02 32.768 kHz controller INT1 controller INT1 register Alarm expansion register 1 Comparator 1 Second Minute Hour Day of Day Month Year the week Real-time data register Comparator 2 INT2 register Alarm expansion register 2 INT2 controller Shift register Serial interface Power-on detection circuit Figure 8 CTRL F32K VDDL FOUT INT1 INT2 SDA SCL VSS Seiko Instruments Inc. 5 5 Page Rev.2.0_00 2-WIRE REAL-TIME CLOCK S-35399A02 2. Configuration of command 13 types of command are available for the S-35399A02, The S-35399A02 does Read/Write the various registers by inputting these codes and commands. The S-35399A02 does not perform any operation with any codes and commands other than those below. Table 9 List of Command Code C2 C1 C0 Command Description Data B7 B6 B5 B4 B3 B2 B1 B0 0 0 0 Status register 1 access 0 0 1 Status register 2 access RESET1 12/ 24 SC02 SC12 INT13 INT23 BLD4 POC4 INT1FE INT1ME INT1AE 32kE INT2FE INT2ME INT2AE TEST5 0 1 0 Real-time data 1 access (year data to) 0 1 1 Real-time data 2 access (hour data to) Y1 Y2 Y4 Y8 Y10 Y20 Y40 Y80 M1 M2 M4 M8 M10 −6 −6 −6 D1 D2 D4 D8 D10 D20 −6 −6 W1 W2 W4 −6 −6 −6 −6 −6 H1 H2 H4 H8 H10 H20 AM/PM −6 m1 m2 m4 m8 m10 m20 m40 −6 s1 s2 s4 s8 s10 s20 s40 −6 H1 H2 H4 H8 H10 H20 AM/PM −6 m1 m2 m4 m8 m10 m20 m40 −6 s1 s2 s4 s8 s10 s20 s40 −6 INT1 register access 0110 (alarm time 1: week/hour/minute) (INT1AE = 1, INT1ME = 0, 1 0 0 INT1FE = 0) W1 H1 m1 W2 H2 m2 W4 H4 m4 −6 −6 −6 −6 A1WE H8 H10 H20 AM/PM A1HE m8 m10 m20 m40 A1mE INT1 register access (output of user-set frequency) 1 Hz 2 Hz 4 Hz 8 Hz 16 Hz SC2 2 SC3 2 SC4 2 (INT1ME = 0, INT1FE = 1) INT2 register access (alarm time 2: week/hour/minute) (INT2AE = 1, INT2ME = 0, 1 0 1 INT2FE = 0) W1 H1 m1 W2 H2 m2 W4 H4 m4 −6 −6 −6 −6 A2WE H8 H10 H20 AM/PM A2HE m8 m10 m20 m40 A2mE INT2 register access (output of user-set frequency) 1 Hz 2 Hz 4 Hz 8 Hz 16 Hz SC5 2 SC6 2 SC7 2 (INT2ME = 0, INT2FE = 1) 1 1 0 Clock correction register access V0 V1 V2 V3 V4 V5 V6 V7 1 1 1 Free register access F0 F1 F2 F3 F4 F5 F6 F7 0 0 0 Up counter access 7 C64k C128k C256k C512k C1M C2M C4M C8M C256 C512 C1k C2k C4k C8k C16k C32k C1 C2 C4 C8 C16 C32 C64 C128 0 0 1 FOUT setting register 1 access 256 Hz 512 Hz 1 kHz 2 kHz 4 kHz 8 kHz 16 kHz 32 kHz 0111 01 10 0 FOUT setting register 2 access 1 Hz 0 Alarm expansion register 1 access (alarm time 1 : year/month/day) Y1 M1 D1 2 Hz Y2 M2 D2 4 Hz Y4 M4 D4 8 Hz Y8 M8 D8 16 Hz Y10 M10 D10 32 Hz Y20 −6 D20 64 Hz Y40 A1YE −6 128 Hz Y80 A1ME A1DE 1 0 1 Alarm expansion register 2 access (alarm time 2 : year/month/day) Y1 M1 D1 Y2 M2 D2 Y4 M4 D4 Y8 Y10 Y20 Y40 Y80 M8 M10 −6 A2YE A2ME D8 D10 D20 −6 A2DE 1. Write-only flag. The S-35399A02 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. 4. Read-only flag. “POC” is set to “1” when power is applied. It is cleared to “0” when Read. Regarding “BLD”, refer to “ Low Power Supply Voltage Detection Circuit”. 5. Test bit for SII. Be sure to set “0” in use. 6. No effect by Write. It is “0” when Read. 7. The up counter is a Read-only register. Seiko Instruments Inc. 11 11 Page

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