EM78452 datasheet(3/54 Pages) EMC

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Contents

Product Specification (V1.0) 10.18.2007

• iii

Contents

General Description .................................................................................................. 1

Features ..................................................................................................................... 1

Pin Assignment ......................................................................................................... 2

Pin Description .......................................................................................................... 3

Function Description ................................................................................................ 4

5.1

Operational Registers......................................................................................... 4

5.1.1

R0 (Indirect Address Register) ............................................................................4

5.1.2

R1 (TCC) .............................................................................................................4

5.1.3

R2 (Program Counter) & Stack ...........................................................................4

5.1.4

R3 (Status Register) ............................................................................................6

5.1.5

R4 (RAM Select Register) ...................................................................................6

5.1.6

R5~R8 (Port 5 ~ Port 8) ......................................................................................6

5.1.7

R9 (Port9)............................................................................................................7

5.1.8

RA (SPIRB: SPI Read Buffer) .............................................................................8

5.1.9

RB (SPIWB: SPI Write Buffer).............................................................................8

5.1.10 RC (SPIS: SPI Status Register) ..........................................................................8

5.1.11 RD (SPIC: SPI Control Register) ........................................................................9

5.1.12 RE (TMR1: Timer 1 Register)..............................................................................9

5.1.13 RF (PWP: Pulse Width Preset Register)...........................................................10

5.1.14 R20~R3E (General-purpose Register)..............................................................10

5.1.15 R3F (Interrupt Status Register) .........................................................................10

5.2

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

5.2.1

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

5.2.2

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

5.2.3

IOC5 ~ IOC9 (I/O Port Control Register) ..........................................................11

5.2.4

IOCC (T1CON: Timer 1 Control Register).........................................................11

5.2.5

IOCD (Pull-high Control Register).....................................................................12

5.2.6

IOCE (WDT Control Register) ...........................................................................12

5.2.7

IOCF (Interrupt Mask Register).........................................................................13

5.3

TCC/WDT Presacler......................................................................................... 15

5.4

I/O Ports ........................................................................................................... 15

5.5

Serial Peripheral Interface Mode ...................................................................... 17

5.5.1

Overview & Features.........................................................................................17

5.5.2

SPI Function Description...................................................................................19

5.5.3

SPI Signal & Pin Description.............................................................................21

5.5.4

Programmed the Related Registers..................................................................22

5.5.5

SPI Mode Timing ...............................................................................................25

5.5.6

Software Application of SPI ...............................................................................26

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