GPLB31A

© Generalplus Technology Inc.

Proprietary & Confidential

2

JAN. 07, 2008

Version: 1.4

Table of Contents

PAGE

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

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

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

4. APPICATION FIELD.................................................................................................................................................................................... 4

5. SIGNAL DESCRIPTIONS............................................................................................................................................................................ 5

5.1. PAD ASSIGNMENT ................................................................................................................................................................................. 6

6. FUNCTIONAL DESCRIPTIONS .................................................................................................................................................................. 7

6.1. MEMORIES ............................................................................................................................................................................................ 7

6.2. MAP OF MEMORY AND I/OS .................................................................................................................................................................... 7

6.3. OPERATING STATES ............................................................................................................................................................................... 7

6.4. SPEECH AND MELODY............................................................................................................................................................................ 8

6.5. LCD CONTROLLER/DRIVER.................................................................................................................................................................... 8

6.6. LCD VOLTAGE GENERATION................................................................................................................................................................... 8

6.7. PWM OUTPUT....................................................................................................................................................................................... 8

6.8. SERIAL SRAM INTERFACE ..................................................................................................................................................................... 8

6.9. BUS MEMORY INTERFACE....................................................................................................................................................................... 8

6.10.VOLTAGE REGULATOR............................................................................................................................................................................ 9

6.11. ASYNCHRONOUS SERIAL INTERFACE (UART) ......................................................................................................................................... 9

6.12.LOW VOLTAGE DETECTION ..................................................................................................................................................................... 9

6.13.WATCHDOG TIMER (WDT) ..................................................................................................................................................................... 9

6.14.MASK OPTIONS.................................................................................................................................................................................... 10

6.15.BONDING OPTIONS .............................................................................................................................................................................. 10

7. ELECTRICAL SPECIFICATIONS ............................................................................................................................................................. 11

7.1. ABSOLUTE MAXIMUM RATINGS ..............................................................................................................................................................11

7.2. DC CHARACTERISTICS..........................................................................................................................................................................11

7.3. THE RELATIONSHIPS BETWEEN THE ROSC AND THE FOSC......................................................................................................................... 12

7.4. THE RELATIONSHIPS BETWEEN THE VDD AND THE FOSC ........................................................................................................................ 12

7.5. THE RELATIONSHIPS BETWEEN THE FOSC AND THE IOP............................................................................................................................ 12

7.6. THE RELATIONSHIPS BETWEEN THE VDD AND THE R32K ........................................................................................................................ 12

8. APPLICATION CIRCUITS ......................................................................................................................................................................... 13

8.1. 2240 DOTS LCD DRIVER, 70 SEGMENTS × 32 COMMONS WITH EXTERNAL SERIAL SRAM, REGULATOR DISABLED - (1) .......................... 13

8.2. 2240 DOTS LCD DRIVER, 70 SEGMENTS × 32 COMMONS WITH EXTERNAL BUS ROM, REGULATOR DISABLED - (2) ................................ 14

8.3. 2240 DOTS LCD DRIVER, 70 SEGMENTS × 32 COMMONS WITH EXTERNAL BUS FLASH, REGULATOR ENABLED - (3)................................ 15

8.4. 2240 DOTS LCD DRIVER, 70 SEGMENTS × 32 COMMONS WITH BUS EXTENDER, REGULATOR DISABLED - (4) ......................................... 16

8.5. SERIAL COMMUNICATIONS BETWEEN TWO GPLB31AS - (5)................................................................................................................... 17

9. PACKAGE/PAD LOCATIONS ................................................................................................................................................................... 18

9.1. ORDERING INFORMATION ..................................................................................................................................................................... 18

10. DISCLAIMER............................................................................................................................................................................................. 19

11. REVISION HISTORY ................................................................................................................................................................................. 20