EM78451AP datasheet(3/54 Pages) EMC

3 / 54 page

Contents

Product Specification (V1.2) 05.27.2004

• iii

Contents

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

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

PIN ASSIGNMENT ............................................................................................................... 2

FUNCTION DESCRIPTION.................................................................................................. 3

4.1

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

4.1.1

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

4.1.2

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

4.1.3

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

4.1.4

R3 (Status Register) ......................................................................................................5

4.1.5

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

4.1.6

R5~R8 (Port 5 ~ Port8).................................................................................................. 6

4.1.7

R9 (Port9) ...................................................................................................................... 6

4.1.8

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

4.1.9

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

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

4.1.11 RD (SPIC: SPI Control Register)................................................................................... 8

4.1.12 RE (TMR1: Timer1 register) .......................................................................................... 9

4.1.13 RF (PWP: Pulse width preset register)........................................................................ 10

4.1.14 R20~R3E (General Purpose Register)........................................................................ 10

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

4.2

Special Purpose Registers ......................................................................................... 10

4.2.1

A (Accumulator) ........................................................................................................... 10

4.2.2

CONT (Control Register) ............................................................................................. 10

4.2.3

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

4.2.4

IOCC (T1CON: Timer1 control register) .......................................................................11

4.2.5

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

4.2.6

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

4.2.7

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

4.3

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

4.4

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

4.5

SERIAL PERIPHERAL INTERFACE MODE .............................................................. 17

4.5.1

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

4.5.2

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

4.5.3

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

4.5.4

Programming the related registers .............................................................................. 22

4.5.5

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

4.5.6

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

4.6

Timer 1 ....................................................................................................................... 30

4.6.1

Overview...................................................................................................................... 30

4.6.2

Function description .................................................................................................... 30

EM78451AP Datasheet(PDF) 3 Page - ELAN Microelectronics Corp

EM78451AP Datasheet(HTML) 3 Page - ELAN Microelectronics Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL