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EM6821WT15 Datasheet(PDF) 3 Page - EM Microelectronic - MARIN SA |
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EM6821WT15 Datasheet(HTML) 3 Page - EM Microelectronic - MARIN SA |
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3 / 68 page  R EM6821 Copyright © 2005, EM Microelectronic-Marin SA 3 www.emmicroelectronic.com Table of Contents FEATURES __________________________________1 DESCRIPTION _______________________________1 TYPICAL APPLICATIONS _______________________1 EM6821 AT A GLANCE _________________________2 1. PIN DESCRIPTION FOR EM6821 _____________4 2. OPERATING MODES ______________________6 2.1 ACTIVE MODE ____________________________6 2.2 STANDBY MODE __________________________6 2.3 SLEEP MODE ____________________________6 3. POWER SUPPLY __________________________7 4. RESET __________________________________8 4.1 OSCILLATION DETECTION CIRCUIT _____________9 4.2 RESET TERMINAL _________________________9 4.3 INPUT PORT A RESET FUNCTION ______________9 4.4 DIGITAL WATCHDOG TIMER RESET ____________10 4.5 CPU STATE AFTER RESET __________________10 5. OSCILLATOR AND PRESCALER____________11 5.1 OSCILLATOR ____________________________11 5.2 PRESCALER ____________________________11 6. INPUT AND OUTPUT PORTS _______________13 6.1 PORTS OVERVIEW ________________________13 6.2 PORT A _______________________________14 6.2.1 IRQ on Port A ______________________14 6.2.2 Pull-up or Pull-down _________________15 6.2.3 Software Test Variables ______________15 6.2.4 Port A for 10-Bit Counter and MSC _____15 6.3 PORT A REGISTERS_______________________15 6.4 PORT B _______________________________17 6.4.1 Input / Output Mode _________________17 6.4.2 Pull-up or Pull-down _________________18 6.4.3 CMOS / NCH. Open Drain Output ______18 6.4.4 PWM and Frequency Output __________19 6.5 PORT B REGISTERS_______________________19 6.6 PORT SERIAL ___________________________20 6.6.1 4-bit Parallel I/O ____________________20 6.6.2 Pull-up or Pull-down _________________21 6.6.3 Nch. Open Drain Outputs _____________22 6.6.4 General Functional Description ________22 6.6.5 Detailed Functional Description ________23 6.6.6 Output Modes ______________________23 6.6.7 Reset and Sleep on Port SP___________24 6.7 SERIAL INTERFACE REGISTERS_______________25 7. MELODY, BUZZER _______________________27 7.1 4-BIT TIMER ____________________________27 7.1.1 Single Run Mode ___________________28 7.1.2 Continuos Run Mode ________________28 7.2 PROGRAMMING ORDER ____________________29 7.3 MELODY REGISTERS ______________________29 8. 10-BIT COUNTER ________________________31 8.1 FULL AND LIMITED BIT COUNTING _____________31 8.2 FREQUENCY SELECT AND UP/DOWN COUNTING___32 8.3 EVENT COUNTING ________________________33 8.4 COMPARE FUNCTION ______________________33 8.5 PULSE WIDTH MODULATION (PWM) ___________33 8.5.1 How the PWM Generator works. _______34 8.5.2 PWM Characteristics ________________ 34 8.6 COUNTER SETUP_________________________ 35 8.7 10-BIT COUNTER REGISTERS ________________ 35 9. MILLISECOND COUNTER _________________ 37 9.1 PA[3] INPUT FOR MSC ____________________ 37 9.2 IRQ FROM MSC _________________________ 37 9.3 MSC-MODES ___________________________ 38 9.4 MODE SELECTION ________________________ 38 9.5 MILLISECOND COUNTER REGISTERS ___________ 40 10. INTERRUPT CONTROLLER ______________ 41 10.1 INTERRUPT CONTROL REGISTERS_____________ 42 11. SUPPLY VOLTAGE LEVEL DETECTOR ____ 43 11.1 SVLD REGISTER_________________________ 43 12. STROBE OUTPUT______________________ 44 12.1 STROBE REGISTER _______________________ 44 13. RAM _________________________________ 45 14. LCD DRIVER __________________________ 46 14.1 LCD CONTROL __________________________ 47 14.2 LCD ADDRESSING________________________ 47 14.3 FREE SEGMENT ALLOCATION ________________ 48 14.4 LCD REGISTERS _________________________ 48 15. PERIPHERAL MEMORY MAP ____________ 50 16. OPTION REGISTER MEMORY MAP _______ 54 17. ACTIVE SUPPLY CURRENT TEST ________ 55 18. MASK OPTIONS _______________________ 56 18.1 INPUT / OUTPUT PORTS ____________________ 56 18.1.1 Port A Metal Options ________________ 56 18.1.2 Port A Metal Options ________________ 56 18.1.3 Port B Metal Options ________________ 57 18.1.4 Port SP Metal Options _______________ 58 18.1.5 Voltage Regulator Option _____________ 59 18.1.6 Debouncer Frequency Option _________ 59 18.1.7 User defined LCD Segment Allocation __ 59 19. TEMP. AND VOLTAGE BEHAVIORS _______ 60 19.1 IDD CURRENT (TYPICAL) ___________________ 60 19.2 PULL-DOWN RESISTANCE (TYPICAL) ___________ 60 19.3 OUTPUT CURRENTS (TYPICAL) _______________ 61 20. ELECTRICAL SPECIFICATION ___________ 62 20.1 ABSOLUTE MAXIMUM RATINGS _______________ 62 20.2 HANDLING PROCEDURES ___________________ 62 20.3 STANDARD OPERATING CONDITIONS___________ 62 20.4 DC CHARACTERISTICS - POWER SUPPLY _______ 62 20.5 SUPPLY VOLTAGE LEVEL DETECTOR___________ 63 20.6 OSCILLATOR ____________________________ 63 20.7 DC CHARACTERISTICS - I/O PINS _____________ 64 20.8 LCD SEG[20:1] OUTPUTS _________________ 65 20.9 LCD COM[4:1] OUTPUTS___________________ 65 20.10 DC OUTPUT COMPONENT ________________ 65 20.11 LCD VOLTAGE MULTIPLIER _______________ 65 21. DIE, PAD LOCATION AND SIZE___________ 66 22. TQF52 PACKAGE DIMENSIONS __________ 67 23. ORDERING INFORMATION ______________ 68 23.1 PACKAGED DEVICES ______________________ 68 23.2 DIE FORM _____________________________ 68 24. SPEC UPDATEERROR! BOOKMARK NOT DEFINED. |
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