EM78459AM datasheet(4/62 Pages) EMC

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EM78459AM Datasheet(PDF) 4 Page - ELAN Microelectronics Corp

Part #	EM78459AM

Description	8-Bit Microcontroller with MASK ROM

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Manufacturer	EMC [ELAN Microelectronics Corp]

Direct Link	http://www.emc.com.tw

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Contents

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Product Specification (V1.4) 05.27.2005

4.2.16 IOCA1 ( DT2H: the Most Significant Byte

( Bit 1 ~ Bit 0 ) of Duty Cycle of PWM2 ) ....................................................................18

4.2.17 IOCB1 ( PRD2: Period of PWM2 ) ..............................................................................19

4.2.18 IOCC1 ( DL1L: the Least Significant Byte

( Bit 7 ~ Bit 0 ) of Duty Cycle Latch of PWM1 ) ..........................................................19

4.2.19 IOCD1 ( DL1H: the Most Significant Byte

( Bit 1 ~ Bit 0 ) of Duty Cycle Latch of PWM1 ) ..........................................................19

4.2.20 IOCE1 ( DL2L: the Least Significant Byte

( Bit 7 ~ Bit 0) of Duty Cycle Latch of PWM2 ) ...........................................................19

4.2.21 IOCF1 ( DL2H: the Most Significant Byte

( Bit 1 ~ Bit 0 ) of Duty Cycle Latch of PWM2 ) ..........................................................19

4.3 TCC/WDT & Prescaler ...............................................................................................19

4.4 I/O Ports .....................................................................................................................20

4.5 RESET and Wake-up .................................................................................................23

4.5.1

The Function of RESET and Wake-up ........................................................................23

4.5.2

The Status of T, and P of STATUS Register ................................................................25

4.6 Interrupt......................................................................................................................26

4.7 Analog-To-Digital Converter (ADC) ............................................................................27

4.7.1

ADC Control Register (ADCON/R9, AD-CMP-CON/IOCA0, GCON/IOC90) .............28

4.7.2

ADC Data Register (ADDATA/RA) ..............................................................................30

4.7.3

A/D Sampling Time......................................................................................................30

4.7.4

A/D Conversion Time...................................................................................................30

4.7.5

A/D Operation During Sleep Mode..............................................................................31

4.7.6

Programming Steps/Considerations............................................................................31

4.8 Dual Sets of PWM ( Pulse Width Modulation )...........................................................34

4.8.1

Overview......................................................................................................................34

4.8.2

Increment Timer Counter ( TMRX: TMR1H/TWR1L or TMR2H/TWR2L )..................35

4.8.3

PWM Period ( PRDX : PRD1 or PRD2 ) .....................................................................35

4.8.4

PWM Duty Cycle ( DTX: DT1H/ DT1L and DT2H/ DT2L; DTL:

DL1H/DL1L and DL2H/DL2L ).....................................................................................35

4.8.5

Comparator X ..............................................................................................................35

4.8.6

PWM Programming Procedures/Steps........................................................................35

4.9 Timer ..........................................................................................................................36

4.9.1

Overview......................................................................................................................36

4.9.2

Function description ....................................................................................................36

4.9.3

Programming the Related Registers ...........................................................................37

4.9.4

Timer programming procedures/steps.........................................................................37

4.10 Comparator ................................................................................................................37

4.10.1 External Reference Signal...........................................................................................37

4.10.2 Comparator Outputs ....................................................................................................38

4.10.3 Using as An Operation Amplifier..................................................................................38

4.10.4 Interrupt .......................................................................................................................38

4.10.5 Wake-up from SLEEP Mode .......................................................................................39

4.11 The Initialized Values after Reset...............................................................................39

4.12 Oscillator ....................................................................................................................43

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