Which bus interface is the best in the SoC or IP design? Wh?

• Jul 1, 2003

• #1

A

ala

Member level 2

Joined

Jun 30, 2003

Messages

44

Helped

4

Reputation

8

Reaction score

0

Trophy points

1,286

Activity points

372

wishbone vs amba

Which bus interface is the best in the SoC or IP design? Why?

 

• Jul 1, 2003

• #2

philewar

Member level 4

Joined

Mar 17, 2002

Messages

72

Helped

3

Reputation

6

Reaction score

3

Trophy points

1,288

Location

Shanghai

Activity points

489

amba vs. wishbone

You can reference RMM3.

In RMM2, it said that muxed bus is better than tri-state bus.

 

• Jul 1, 2003

• #3

X

xuanjie

Junior Member level 2

Joined

Jun 11, 2003

Messages

21

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

146

wishbone bus throughput performance

Actually, I remember there were some quite interesting debates between point-to-point vs. share-bus topology in the system bus area. They both have pros and cons. It really depends on what kind of architecture you are targeting for.

For most of the case, you probably want to have share-bus if you want any one of the modules can talk to any others. In such cases, I recommend AMBA. And the reasons are (1) pipelined nature for performance enhancement. (2) intuitive protocol, and (3) Very well documented.

Actually the reason number (3) might prevail the first two. And you can upscale the fequency as needed

 

• Jul 1, 2003

• #4

V

visualart

Advanced Member level 1

Joined

Dec 21, 2001

Messages

466

Helped

28

Reputation

56

Reaction score

4

Trophy points

1,298

Activity points

3,333

soc bus interconects

free: WISHBONE
protect: AMBA from arm
Core connect from IBM
They are the reality standard of the SOC and IP connect

 

• Jul 1, 2003

• #5

I

it_boy

Full Member level 3

Joined

Jul 18, 2002

Messages

173

Helped

6

Reputation

12

Reaction score

2

Trophy points

1,298

Activity points

1,261

soc buses

I agree with xuanjie.

I too prefer AMBA over other bus architectures like Wishbone mainly because of its pipelined architecture.

 

• Jul 1, 2003

• #6

A

ala

Member level 2

Joined

Jun 30, 2003

Messages

44

Helped

4

Reputation

8

Reaction score

0

Trophy points

1,286

Activity points

372

bvci verses ahb

Thanks everyone.
In the IP camera project, I need connect the vedio, audio, MCU, interface etc IP cores, Can you give me the advice?
Tia

 

• Jul 2, 2003

• #7

J

juripero

Member level 4

Joined

Jul 30, 2002

Messages

79

Helped

4

Reputation

8

Reaction score

1

Trophy points

1,288

Activity points

477

connecting ip to amba bus

I think that is highly dependent on what kind MCU you are going to choose. If it is ARM, definatly go with AMBA.

 

• Jul 2, 2003

• #8

S

satya

Member level 3

Joined

Jun 14, 2001

Messages

61

Helped

1

Reputation

2

Reaction score

0

Trophy points

1,286

Location

bangalore

Activity points

530

bvci bus standard

Hi ,
there are lot many SoC Buses are available in Market for SoftIP Connect.
1. AMBA
2.CORE CONNECT (ONCHIP PERIPHERAL BUS)
3.OCP (FROM OCP-IP)
4.VCI/BVCI/PVCI
etc..,

Hope this helps.,
Regards,
- satya

 

• Sep 5, 2003

• #9

R

rakko

Full Member level 4

Joined

Jun 1, 2001

Messages

233

Helped

10

Reputation

20

Reaction score

6

Trophy points

1,298

Location

mozambic

Activity points

2,065

ocp versus amba

A word of advise. stay away from AMBA if you care about performance. AMBA sucks when it comes to performance. We used it in one of our design and regret ever using it. If you have more than 2 devices sitting on your bus and if your devices need to use the bus frequently, then try some other bus interconnect. AMBA is good for low speed and low performance IO based devices. It does not hold candle to any other bus when it comes to throughput.

 

• Sep 16, 2003

• #10

J

john_xiang

Newbie level 3

Joined

Jul 17, 2003

Messages

3

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

14

bvci interface

vci/bvci/pvci
the interface is free and easy to do implement with verilog
I think so!

 

• Sep 16, 2003

• #11

Ace-X

Advanced Member level 2

Joined

Jan 25, 2002

Messages

529

Helped

41

Reputation

82

Reaction score

14

Trophy points

1,298

Location

Germany

Activity points

5,151

Check also this:
**broken link removed**

Ace-X.

 

• Sep 22, 2003

• #12

K

kinysh

Member level 3

Joined

Jul 16, 2002

Messages

65

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,286

Activity points

509

Re: Which bus interface is the best in the SoC or IP design?

Yes, AMBA sucks, it is not only difficult to design,
its pipeline means nothing at all. only one address ahead fits nothing except for sram design.

bests
kinysh

 

• Apr 22, 2004

• #13

S

sandusty

Member level 5

Joined

Apr 19, 2004

Messages

89

Helped

3

Reputation

6

Reaction score

1

Trophy points

1,288

Activity points

910

Hi, ala:

For the bus protocal, you might want to think what ip(s) you have had in hands. Adding wrapper around your up, arbitor, bridge, dsp, mem IF, .... it's not practical. It added more delay cycles and pull down your system performance.

You might want to re-consider merging the buses for your IP cam.... You needed to perform the 3As (or 4As) control for the frontend at "real time"; you needed to drag the dada from the sensor(s) and put into V-RAM; you needed to compress the image and save it; you might need to display those image(s) too....

a merged bus might not be a good idea in your case...

 

• Apr 22, 2004

• #14

E

eda_wiz

Advanced Member level 2

Joined

Nov 7, 2001

Messages

653

Helped

58

Reputation

116

Reaction score

29

Trophy points

1,308

Activity points

6,195

rakko said:

A word of advise. stay away from AMBA if you care about performance. AMBA sucks when it comes to performance. We used it in one of our design and regret ever using it. If you have more than 2 devices sitting on your bus and if your devices need to use the bus frequently, then try some other bus interconnect. AMBA is good for low speed and low performance IO based devices. It does not hold candle to any other bus when it comes to throughput.

Click to expand...

you could have used a AHB multi layer bus (Bus interconnect matrix) in such a situation

 

• May 26, 2004

• #15

C

CatKing

Full Member level 3

Joined

Jun 5, 2001

Messages

157

Helped

3

Reputation

6

Reaction score

2

Trophy points

1,298

Activity points

1,150

OCP
**broken link removed**

 

• Aug 31, 2004

• #16

P

patrickli

Member level 1

Joined

Mar 4, 2002

Messages

35

Helped

1

Reputation

2

Reaction score

1

Trophy points

1,288

Activity points

199

Re: Which bus interface is the best in the SoC or IP design?

where can I find the VCI spec?

 

• Aug 31, 2004

• #17

C

computer_terminator

Member level 3

Joined

Aug 28, 2001

Messages

67

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,286

Activity points

451

Re: Which bus interface is the best in the SoC or IP design?

If you really care the performance, use crossbar instead of AMBA, core connect or wishbone.
But it will cost you a lot.
performance => cost

 

• Aug 31, 2004

• #18

A

AlexWan

Full Member level 5

Joined

Dec 26, 2003

Messages

304

Helped

8

Reputation

16

Reaction score

2

Trophy points

1,298

Activity points

2,692

Re: Which bus interface is the best in the SoC or IP design?

If your MCU is fast. I think AHB is good choice

Good Luck

 

• Aug 31, 2004

• #19

E

eda_wiz

Advanced Member level 2

Joined

Nov 7, 2001

Messages

653

Helped

58

Reputation

116

Reaction score

29

Trophy points

1,308

Activity points

6,195

This post is too old... Anyway I guess ... AMBA (AMBA 3.0)AXI willl be good choice for high speed systems...

 

• Oct 21, 2004

• #20

V

visualart

Advanced Member level 1

Joined

Dec 21, 2001

Messages

466

Helped

28

Reputation

56

Reaction score

4

Trophy points

1,298

Activity points

3,333

The VSIA shall provide u a satisfying answer.