GPL31B2

© Generalplus Technology Inc.

Proprietary & Confidential

2

MAR. 18, 2010

Version: 1.1

Table of Contents

PAGE

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

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

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

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

4.1. PAD ASSIGNMENT ................................................................................................................................................................................. 5

5. FUNCTIONAL DESCRIPTIONS.................................................................................................................................................................. 6

5.1. MAP OF MEMORY AND I/OS .................................................................................................................................................................... 6

5.2. ROM AREA ........................................................................................................................................................................................... 6

5.3. OPERATING STATES ............................................................................................................................................................................... 6

5.4. TIME-BASE-SETTING REGISTER ............................................................................................................................................................. 6

5.5. TIMER/COUNTER ................................................................................................................................................................................... 7

5.6. SPEECH AND MELODY............................................................................................................................................................................ 7

5.7. LCD CONTROLLER/DRIVER.................................................................................................................................................................... 7

5.8. VOLTAGE DOUBLER/REGULATOR ............................................................................................................................................................ 7

5.9. PWM OUTPUT....................................................................................................................................................................................... 7

5.10.LOW VOLTAGE RESET ............................................................................................................................................................................ 8

5.11.WATCHDOG TIMER (WDT) ..................................................................................................................................................................... 8

5.12.LOW VOLTAGE DETECT .......................................................................................................................................................................... 8

5.13.MASK OPTIONS...................................................................................................................................................................................... 8

5.13.1.

32768 crystal oscillator ......................................................................................................................................................... 8

5.13.2.

Low voltage detect................................................................................................................................................................ 8

5.14.SEG[43:41] CAN BE OPTIONED TO IOEF[7:5] ........................................................................................................................................ 8

5.15.BUILT-IN REGULATOR CAN BE DISABLED ................................................................................................................................................. 8

6. ELECTRICAL SPECIFICATIONS ............................................................................................................................................................... 9

6.1. ABSOLUTE MAXIMUM RATINGS ............................................................................................................................................................... 9

6.2. DC CHARACTERISTICS (VDD = 3.0V, TA = 25℃) .................................................................................................................................... 9

6.3. DC CHARACTERISTICS (VDD = 4.5V, TA = 25℃) .................................................................................................................................... 9

6.4. THE RELATIONSHIPS BETWEEN THE ROSC AND THE FCPU......................................................................................................................... 10

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6.4.1. VDD = 3.0V, TA = 25℃ ............................................................................................................................................................ 10

6.4.2. VDD = 4.5V, TA = 25℃ ............................................................................................................................................................ 10

6.5. THE RELATIONSHIPS BETWEEN THE FCPU AND THE IOP ............................................................................................................................ 10

6.6. THE RELATIONSHIPS BETWEEN THE FCPU AND THE VDD......................................................................................................................... 10

7. APPLICATION CIRCUITS ......................................................................................................................................................................... 11

7.1. APPLICATION CIRCUIT – (1) ...................................................................................................................................................................11

7.2. APPLICATION CIRCUIT – (2) .................................................................................................................................................................. 12

8. PACKAGE/PAD LOCATIONS ................................................................................................................................................................... 13

8.1. ORDERING INFORMATION ..................................................................................................................................................................... 13

9. DISCLAIMER............................................................................................................................................................................................. 14

10. REVISION HISTORY ................................................................................................................................................................................. 15