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| JT9673-AS TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic JT9673-AS LCD Display Stopwatch LSI This product is a single-chip CMOS LSI for stopwatches capable of directly driving a 7-digit LCD with four signs. Applications * Stopwatches Features * * * * * * * * 32.768 kHz crystal oscillator Displays hour, minute, second, and hundredths of seconds Four-sign, 7-digit display, 1/3-duty LCD drive 5 display modes (RESET, RUN, STOP, LAP, LAP STOP) and optional display modes (NORMAL LAP, SECTION LAP) are selectable by bonding option. Counting by 9 hours, 59 minutes, 59 seconds, 99 hundredths of second (units: 1/100 second) Power supply: 1.55 V-single power supply Built-in voltage doubler circuit Low current consumption (Isup = 3.0 A max) Block Diagram 1 2003-02-12 JT9673-AS Pin Descriptions (44 pins) Pin Name Power Supply Pins Oscillator Pins Input Pins Output Pin Display Pins Test Pins Voltage Doubler Pins Symbol VDD (2), VSS1, VSS2 XI, XO S1~3, SL1~3 BUZZ COM1~3, SEG (22) T1~4 FAI1, FAI2 No. of Pins 4 2 6 1 25 4 2 Pad Layout Note 1: Be sure to connect the VDD (MAIN). 2 2003-02-12 JT9673-AS Pad Location Table Pin Name SEG1 SEG5 SEG6 SEG7 SEG11 SEG12 SEG13 SEG17 SEG18 SEG19 COM3 COM2 COM1 FAI1 FAI2 VSS2 XI XO VDD (MAIN) BUZZ VSS1 SEG22 X Point -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -618 -455 -292 -129 33 196 359 522 684 847 1010 Y Point -618 -455 -292 -129 33 196 359 522 684 847 1010 1067 1067 1067 1067 1067 1067 1067 1067 1067 1067 1067 Pin Name SEG21 SEG20 SEG16 SEG15 SEG14 SEG10 SEG9 SEG8 SEG4 SEG3 SEG2 T4 T3 T2 T1 SL1 VDD (SUB) SL2 SL3 S1 S2 S3 X Point 1067 1067 1067 1067 1067 1067 1067 1067 1067 1067 1067 618 455 292 130 -33 -196 -359 -522 -684 -847 -1010 Y Point 618 455 292 130 -33 -196 -359 -522 -684 -847 -1010 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 -1067 (mm) 3 2003-02-12 JT9673-AS Function Specifications 1. LCD Segment Pattern COM1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 Lap Stop 7d 7p 3/4 6d 6p 3/4 5d 5p Section 2 COM2 Section 1 7e 7g 7c 6e 6g 6c 5e 5g 5c 4e COM3 Standard 1 7f 7a 7b 6f 6a 6b 5f 5a 5b 4f SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 COM1 4d 4p 3/4 3d 3p Standard 2 2d 2p 3/4 1d 1p COM2 4g 4c 3e 3g 3c 2e 2g 2c 1e 1g 1c COM3 4a 4b 3f 3a 3b 2f 2a 2b 1f 1a 1b 2. LCD Drive Waveform 4 2003-02-12 JT9673-AS 3. Display Modes 4. Display Sequence The display returns from 9 hours, 59 minutes, 59 seconds, 99 1/100 seconds, to 0 hours, 00 minutes, 00 seconds 00 and counting continues. 5. Display Example 5 2003-02-12 JT9673-AS 6. Input Setting S1, S2, S3: Normally all pulled down to the VSS1 level by IC internal pull-down resistance. S1, S2, and S3 perform their specified functions when connected to the VDD by an external switch. SL1, SL2, SL3: Normally, all pulled down to the VSS1 level by IC internal pull-down resistance. Setting the level of the pins externally allows functions to be selected T1, T2, T3, T4: Normally, all pulled up to the VDD level by IC internal pull-up resistance. Used for IC testing. 7. Type Selection Function SL1 0 1 3/4 3/4 3/4 3/4 SL2 3/4 3/4 0 1 0 1 SL3 3/4 3/4 0 0 1 1 Type A Type (1/100 seconds display) B Type (1/10 seconds display) C Type D Type E Type F Type See 8. Mode Sequence. Note 2: `0' indicates input is OPEN or connect to VSS1. `3/4' indicates don't care. 8. Mode Sequence (1) C type Starts functioning on the rising edge of S1 and S2 (2) D type (3) E type 6 2003-02-12 JT9673-AS (4) F type STANDARD LAP mode SECTION LAP mode * * * S3 toggles between STANDARD LAP mode and SECTION LAP mode. In SECTION LAP mode, when switched from RUN to LAP, the counter is immediately reset to `0'. When switched from SECTION LAP mode to NORMAL LAP mode by pressing S3, the counter is not reset to `0'. 9. Display Column Table Display Column Mode Digit Segment 7 6 5 4 3 2 (3/4) 1 () 7P 6P (1) Dot Segment 5P 4P 1 3P 2P 1P Sign Lap Stop Stan- Secdard tion (1) 1 Reset Run 10 1 10 1 Hour min- min- sec- secutes ute onds ond 10 1 10 1 1/10 Hour min- min- sec- secutes ute onds ond second 10 1 10 1 Hour min- min- sec- secutes ute onds ond 10 1 10 1 Hour min- min- sec- secutes ute onds ond (3/4) 1/100 second (1/10 second) (1) 1 (1) 1 Stop (1) 1 (1) 1 Lap (1) 1 (1) 1 Lap Stop (1) 1 (1) 1 Note 3: When 1/10 s type is selected, only the first and second column displays are different. The display is as in the parentheses ( ). Note 4: `' indicates `lit'. (7P always lit) Note 5: `' indicates flashing at 1 Hz. Note 6: In the F type only, `(1)' flashes at 1 Hz when STANDARD LAP mode is selected. Note 7: In the F type only, ` 1 ' flashes at 1 Hz when SECTION LAP mode is selected. Note 8: 1P, 2P, 3P, and 5P do not light. 7 2003-02-12 JT9673-AS 10. Chattering Prevention Function A chattering prevention circuit is provided for the S1, S2, and S3 inputs. The input waveform shown below does not cause malfunction. Tch < 31.25 ms TON, OFF > 31.25 ms = 11. Buzzer Drive Function Pressing S1 or S2 turns the buzzer drive circuit ON for around 30~60 ms. The drive frequency is 4 kHz. 12. Autoclear Circuit An autoclear circuit is incorporated for when the power supply is switched ON, at which time the counter reads "0" and RESET mode is selected. (to operate the autoclear circuit more dependably, externally attach a capacitor between T2 and VSS1.) 13. Input Circuit Setting Error The S1, S2 switch input circuit operates on the first rising edge of the input. The error for one switching is a maximum of 1/100 second. 14. Test Functions T1 1 1 0 3/4 3/4 3/4 3/4 3/4 3/4 3/4 T2 1 0 fT2 3/4 3/4 3/4 3/4 3/4 3/4 3/4 T3 1 3/4 3/4 0 0 1 1 0 0 0 T4 1 3/4 3/4 0 0 0 0 1 1 0 S1 0 3/4 3/4 1 0 1 3/4 1 3/4 1 S2 0 3/4 3/4 0 1 3/4 1 3/4 1 1 Normal All clear Acceleration from the 256 Hz stage using fT2 Output 100 Hz to BUZZ pin +1 h by S2 +10 mins by S1 +1 min by S2 +10 s by S1 +1 s by S2 LCD all lit, BUZZ output (H level) Function Note 9: When T3 = 0 or T4 = 0, the normal functions of S1 and S2 are disabled. Note 10: An ALL CLEAR sets to RESET mode (0 hours, 00 minutes, 00 seconds, 00 1/100 seconds). 15. All Clear Function When power is applied or when the supply of power is interrupted (e.g. if the battery is changed), the internal state of the IC may become unstable, even though it appears to be operating normally. For this reason it is vital to verify that the crystal oscillation circuit is oscillating normally ant stably (at 32 kHz) and then to use the system reset pin to initialize the IC (i.e. clear it) before use. Note that a clear operation using the built-in power-on clear circuit should not be used in this case. 8 2003-02-12 JT9673-AS Maximum Ratings (if no temperature stipulations, Ta = 25C) Characteristics Power supply voltage (1) Power supply voltage (2) Input voltage (1) Input voltage (2) Output voltage (1) Output voltage (2) Operating temperature Storage temperature Symbol VSS1-VDD VSS2-VDD VIN1 VIN2 VOUT1 VOUT2 Topr Tstg Rating -3.0~0.2 -4.5~0.2 VSS1 - 0.2~VDD + 0.2 VSS2 - 0.2~VDD + 0.2 VSS1 - 0.2~VDD + 0.2 VSS2 - 0.2~VDD + 0.2 -10~60 -40~125 Unit V V V V V V C C Electrical Characteristics (unless otherwise stated, VDD = 0.00 V, VSS1 = -1.55 V, VSS2 = -3.00 V, CG = 20 pF, W CD = built-in (10 pF), CIMAX = 21 kW, Fo = 32768 Hz) Characteristics Operating voltage Operating current consumption Oscillation start voltage Output current (1) Segment Output current (2) Common Output current (3) Buzzer Input current (1) S3, SL1, SL2, SL3 Input current (2) T1, T3, T4 Input current (3) T2 Input current (4) S1, S2 Voltage doubler output Symbol iVSS1-VDDi iIsupi iVSTAi IOH1 IOL1 IOH2 IOL2 IOH3 IOL3 IIH1 IIL1 IIH2 IIL2 IIH3 IIL3 IIH4 IIL4 iVUCOi Test Circuit 3 2 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 2 No LCD load tSTA 10 s VOH1 = -0.2 V VOL1 = -2.8 V VOH2 = -0.2 V VOL2 = -2.8 V VSS1 = -1.25 V VOH3 = -0.5 V Test Condition 3/4 Min 1.25 3/4 3/4 3/4 0.5 3/4 4.0 3/4 100 1.55 -0.1 3/4 3/4 3/4 -15.5 15.5 -0.1 3.0 Typ. 1.55 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 -50 3/4 3/4 3/4 3/4 3/4 Max 1.80 3.0 1.40 -0.5 3/4 -4.0 3/4 -100 mA 3/4 20.0 3/4 0.1 3/4 0.1 3/4 150 3/4 3/4 mA Unit V mA V mA mA VSS2 = -2.8 V VOL3 = -0.75 V VIH1 = 0 V VIL1 = -1.55 V VIH2 = 0 V VIL2 = -1.55 V VIH3 = 0 V VIL3 = -1.55 V VIH4 = 0 V VIL4 = -1.55 V C1 = C2 = 0.1 mF, RL = 3 MW mA mA mA V 9 2003-02-12 JT9673-AS Test Circuit 1. Oscillation Circuit X'tal Rs = 21 kW Fo = 32.768 kHz CG = 20 pF CD = 10 pF built in 2. Measuring Isup and VUCO 3. 4. When measuring SL1, SL2, SL3, set T2 to VSS1. 10 2003-02-12 JT9673-AS Application Circuit Example Note 11: Be sure to connect the VDD (MAIN). 11 2003-02-12 JT9673-AS RESTRICTIONS ON PRODUCT USE 000707EBA * TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * The products described in this document are subject to the foreign exchange and foreign trade laws. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. * The information contained herein is subject to change without notice. 12 2003-02-12 |
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