EM6621 datasheet(3/69 Pages) EMMICRO

3 / 69 page

EM6621

03/02 REV. D/444

 2002, EM Microelectronic-Marin SA

www.emmicroelectronic.com

Table of Contents

FEATURES _________________________________ 1

DESCRIPTION _______________________________ 1

TYPICAL APPLICATIONS ______________________ 1

EM6621 AT A GLANCE ________________________ 2

PIN DESCRIPTION FOR EM6621 ____________ 4

OPERATING MODES______________________ 6

2.1

ACTIVE MODE _________________________ 6

2.2

STANDBY MODE ________________________ 6

2.3

SLEEP MODE __________________________ 6

POWER SUPPLY _________________________ 7

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

OSCILLATOR AND PRESCALER ___________ 11

5.1

OSCILLATOR _________________________ 11

5.2

PRESCALER__________________________ 11

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

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

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

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

PULL-UP RESISTANCE (TYPICAL)____________61

19.4

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.

PACKAGE & ORDERING INFORMATION ___67

22.1

ORDERING INFORMATION _________________68

22.2

PACKAGE MARKING _____________________68

22.3

CUSTOMER MARKING____________________68

23.

SPEC UPDATE ________________________69

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