All trademarks mentioned in this document

are trademarks of their respective owners.

Copyright 1999-2007 DCD – Digital Core Design. All Rights Reserved.

http://www.DigitalCoreDesign.com

http://www.dcd.pl

IMPROVEMENT

For user the most important is application

speed improvement. The most commonly

used arithmetic functions and theirs improve-

ment are shown in table below. Improvement

was computed as {M68HC08 clock periods}

divided by {DF6808 clock periods} required to

execute an identical function. More details are

available in core documentation

Function

Improve-

ment

8-bit addition (immediate data)

4

8-bit addition (direct addressing)

4

8-bit addition (indirect addressing)

3,6

8-bit subtraction (immediate data)

4

8-bit subtraction (direct addressing)

4

8-bit subtraction (indirect addressing)

3,6

16-bit addition (immediate data)

4

16-bit addition (direct addressing)

4

16-bit addition (indirect addressing

3,6

16-bit subtraction (immediate data)

4

16-bit subtraction (direct addressing)

4

16-bit subtraction (indirect addressing

3,6

Multiplication

5

Division

5

DF68XX FAM I LY O V ERVI EW

The main features of each DF68XX family member have been summarized in table below. It gives

a briefly member characterization helping user to select the most suitable IP Core for its application.

User can specify its own peripheral set (including listed below and the others) and requests the core

modifications.

Design

DF6805

64k

64k

-

7

7

-

-

*

2/2*

1*

*

4

+

*

-

6 700

DF6808

64k

64k

-

7

7

-

-

*

22*

1*

*

4

*

-

8 900

DF6811

64k

16M

-

20

17

1*

*

5/3*

1*

*

4

*

*

*

12 000

DF6811CPU

64k

16M

-

3

3

+

1*

*

+

+

+

+

+

+

+

6 500

DF68XX family of High Performance Microcontroller Cores

+ optional

* configurable