GPLB13A

© Generalplus Technology Inc.

Proprietary & Confidential

2

FEB. 01, 2007

Version: 1.2

Table of Contents

PAGE

1. GENERAL DESCRIPTION .......................................................................................................................................................................... 3

2. BLOCK DIAGRAM ...................................................................................................................................................................................... 3

3. FEATURES .................................................................................................................................................................................................. 3

4. SIGNAL DESCRIPTIONS............................................................................................................................................................................ 4

5. FUNCTIONAL DESCRIPTIONS .................................................................................................................................................................. 5

5.1. MAP OF MEMORY AND I/OS .................................................................................................................................................................... 5

5.2. OPERATING STATES ............................................................................................................................................................................... 5

5.3. CPU CLOCK .......................................................................................................................................................................................... 5

5.4. LOW BATTERY VOLTAGE DETECTOR ....................................................................................................................................................... 5

5.5. BUZZER DRIVER .................................................................................................................................................................................... 5

5.6. LCD CONTROLLER/DRIVER.................................................................................................................................................................... 5

5.6.1. LCD RAM mapping ................................................................................................................................................................... 6

5.7. LCD VOLTAGE DOUBLER/REGULATOR .................................................................................................................................................... 6

5.8. RESET FUNCTION .................................................................................................................................................................................. 6

5.9. MASK OPTIONS...................................................................................................................................................................................... 6

5.9.1. 32768 oscillator......................................................................................................................................................................... 6

5.9.2. Watchdog timer ......................................................................................................................................................................... 6

5.9.3. PA3, PA4, PA5 input mode selection mode .............................................................................................................................. 6

5.9.4. System low voltage reset detector ............................................................................................................................................ 7

5.9.5. Battery low voltage detector...................................................................................................................................................... 7

5.9.6. SEGMENT/IO ........................................................................................................................................................................... 7

6. ELECTRICAL SPECIFICATIONS ............................................................................................................................................................... 8

6.1. ABSOLUTE MAXIMUM RATINGS ............................................................................................................................................................... 8

6.2. DC CHARACTERISTICS (VDD = 1.5V, TA = 25℃) .................................................................................................................................... 8

6.3. THE RELATIONSHIPS BETWEEN THE VDD AND THE F

CPU............................................................................................................................ 8

7. APPLICATION CIRCUITS ........................................................................................................................................................................... 9

7.1. APPLICATION CIRCUIT - (1) ..................................................................................................................................................................... 9

7.2. APPLICATION CIRCUIT - (2) ................................................................................................................................................................... 10

8. DISCLAIMER............................................................................................................................................................................................. 11

9. REVISION HISTORY ................................................................................................................................................................................. 12