EM78459AM datasheet(3/62 Pages) EMC

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Contents

Product Specification (V1.4) 05.27.2005

• iii

Contents

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

FEATURES ........................................................................................................................... 1

PIN ASSIGNMENT ............................................................................................................... 3

3.1 EM78458 Pin Description.............................................................................................3

3.2 EM78459 Pin Description.............................................................................................4

FUNCTION DESCRIPTION.................................................................................................. 5

4.1 Operational Registers ..................................................................................................5

4.1.1

R0 (Indirect Addressing Register) .................................................................................5

4.1.2

R1 (Time Clock /Counter)..............................................................................................5

4.1.3

R2 (Program Counter) & Stack......................................................................................5

4.1.4

R3 (Status Register) ......................................................................................................7

4.1.5

R4 (RAM Select Register) .............................................................................................7

4.1.6

R5 ~ R6 (Port 5 ~ Port 6)...............................................................................................7

4.1.7

R7 ~ R8 .........................................................................................................................7

4.1.8

R9 (ADCON: Analog to Digital Control).........................................................................9

4.1.9

RA (ADDATA: the converted value of ADC) ..................................................................9

4.1.10 RB..................................................................................................................................9

4.1.11 RC................................................................................................................................10

4.1.12 RD................................................................................................................................10

4.1.13 RE................................................................................................................................10

4.1.14 RF (Interrupt Status Register) .....................................................................................10

4.2.15 R10 ~ R3F ...................................................................................................................10

4.2 Special Purpose Registers ......................................................................................... 11

4.2.1

A (Accumulator) ...........................................................................................................11

4.2.2

CONT (Control Register) ............................................................................................. 11

4.2.3

IOC50 ~ IOC60 (I/O Port Control Register).................................................................12

4.2.4

IOC90 (GCON: I/O Configuration & Control of ADC ) .................................................12

4.2.5

IOCA0 ( AD-CMPCON ) .............................................................................................13

4.2.6

IOCB0 (Pull-down Control Register) ...........................................................................14

4.2.7

IOCC0 (Open-Drain Control Register) ........................................................................14

4.2.8

IOCD0 (Pull-high Control Register) .............................................................................15

4.2.9

IOCE0 (WDT Control Register) ...................................................................................15

4.2.10 IOCF0 (Interrupt Mask Register) .................................................................................16

4.2.11 IOC51 ( PWMCON ) ....................................................................................................17

4.2.12 IOC61 ( DT1L: the Least Significant Byte

( Bit 7 ~ Bit 0) of Duty Cycle of PWM1 ) .....................................................................17

4.2.13 IOC71 ( DT1H: the Most Significant Byte

( Bit 1 ~ Bit 0 ) of Duty Cycle of PWM1 ) ....................................................................18

4.2.14 IOC81 ( PRD1: Period of PWM1 )...............................................................................18

4.2.15 IOC91 ( DT2L: the Least Significant Byte

( Bit 7 ~ Bit 0 ) of Duty Cycle of PWM2 ) ..................................................................18

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