4-Bit MCU Series 13-DIGIT ALARM WATCH COUNTDOWN TIMER

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1 1. ECRIPTION The L9221is a single-chip application of 4-bit microcontroller fabricated in CO technology, with built-in RO, RA, and 12 I/O pin, buzzer and common, segment driver output. This digital 7-function watch integrated with timer and chronograph, designed to for a 13-digit triplexed liquid crystal display. The countdown timer can be set within a range of 1 min to 24 hours. The chronograph lets measure elapsed time as split time. The range of stopwatch is 23 hours, 59 min, 59 seconds. The L9221 generates alarm, chime and touch-tone signals on the BZ, BZN outputs to direct drive a buzzer and provides special signal on the ALB output to initiate a melody chip 1.1 FUNCTION 7 functions: onth, ate, ay-of-week, Hour, inute, econd, ual Time 6-digit Chronograph with plit function Countdown Timer to 24 hours User selectable 12-hour/24-hour format 4-year calendar Chime on every hour Alarm function 1.2 FEATURE ingle-chip CO construction rives 13-digit triplexed LC 32,768Hz crystal frequency ingle 3V battery operation Low power dissipation 3-switch sequential operation Touch-tone signal 2. ABOLUTE AXIU RATING Characteristic ymbol Value Unit upply Voltage V CC ~ V isplay Voltage V ~ V Operating Temperature T opr - 20 ~ + 70 torage Temperature T stg - 55 ~ o C o C 3. ELECTRICAL CHARACTERITIC (Ta = 25 o C, V = 0V, V CC = 3V unless otherwise specified) Characteristic ymbol Test Condition in Typ ax Unit Operating Voltage V CC V isplay Voltage V V upply Current I CC Without load A Oscillator tart Voltage V OC 2.7 V Alarm rive Current I BZ, I BZN Vsat = 0.5V (Both irection) 1 2 ma Oscillator Input and Output Capacitor I ALB A C IN, 20 pf C OUT

2 4. LC FORAT H I L A Q Q F B E G 1 C COL CO2 CO1 CO2 CO3 Pad Pin Pad Name CO1 CO2 CO3 Pad Pin Pad Name CO1 CO2 CO CO2 CO EG15 C13 G13 B CO1 CO EG16 E13 F13 A CO2 CO EG17 11 C12 B CO3 CO EG18 C11 E12 A12/12/G EG1 F1 E1 A1/ EG19 L B11 A EG2 B1 G1 C EG20 E11 G11 F EG3 F2 E EG21 Q T BC EG4 A2 G2 C EG22 I9 C9 B EG5 B2 COL E EG23 9 G9 A EG6 F3 G3 A3/ EG24 E9 F9 H EG7 B3 C3 E EG25 I8 C8 B EG8 F4 G EG26 8 G8 A EG9 A4 B4 C EG27 E8 F8 H EG10 F5 E EG28 I7 C7 B EG11 A5 G5 C EG29 7 G7 A EG12 B5 F6 E EG30 E7 F7 H EG13 A6 G EG31 - A TIER EG14 13 B6 C EG32 AL P CHIE 5. ALAR OUTPUT WAVEFOR 4,096 Hz (50% duty) 4,096 Hz (50% duty) sec 20 sec B, BN Alarm matching signal 0.5 ec 31.25m ec B, BN Chime signal stopwatch eep? signal ALB Alarm matching 20 sec signal 0.5 sec ALB Chime signal 6. TIER OUTPUT WAVEFOR sec B, BN Timer matching signal

3 7. ETTING EQUENCE AN WITCH OPERATION REAL TIE ALAR TOP WATCH TIER inute set econd set NOTE: 1. When switches,, are depressed together, all segments of LC will be displayed and after releasing all digits of LC will be resetted Hold down more then 2 sec. inute set econd Time etting 12/24 Format set onth set ate set ay set Real Time etting

4 8. ALAR ETTING and TOP WATCH OPERATION ALAR TOP WATCH Both OFF Both ON (tart) (Counting) isplay Lap Time (Lap) (Release) (Counting) isplay Counting Time Alarm only Alarm etting Hourly Time ignal only (tart) (top) (tart) (top) (top) isplay Lap Time (top) isplay topped Time Reset Notes: 1.? and? - flashing at 2Hz when counting 2. ymbol T is ON at any other modes when topwatch is counting 3. topwatch range is minutes, seconds, 1/100 secondstill 30 min, then autoranging to hours, minutes and seconds. inute set

5 9. TIER OPERATION TIER inute set Countdown tart top/tart Counting top Counting End of Countdown Alarm is sounding Note: The symbol T is ON at any other modes when time is counting

6 10. APPLICATION CIRCUIT L9221 NOTE: The die area should be isolated or connected to V

7 11. PA IAGRA Pad Pad Name X Y Pad Pad Name X Y Pad Pad Name X Y 1 CO BZN EG V T EG T EG EG CAP EG EG CAP EG EG OCO EG EG OCI EG EG V CC EG EG T EG EG T EG EG AC EG EG V EG EG EG EG EG EG EG EG T EG EG ALB EG CO BZ EG CO