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How to reduce the speed of incoming data ?

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Speed Conversion

Hi, I've got this problem that maybe someone here can help. I've got incoming data at 64Kbps and I want to reduce the speed to 9600bps. Anyone has any idea how I can do this? Thanks
 

Re: Speed Conversion

uses big memory buffer to save receiver data, and send it again with low speed. but if memory buffer is full, stoped receiver data. and if memory buffer empty, reveive data again.
 

Re: Speed Conversion

You are in a classic example in witch the througput (lambda) of the sender is more high than the througput of the receiver (mhu) (lambda/mhu) > 1. How in the classic MM1 Queue to solve this problem is only necessary to use break (like in modem transmission) in transmission. The dimension of buffer is a secondary problem (les important).
A good examples is a sliding window mechanism like in HDLC and RLP protocols thus, you can study this specifications in www.mcu.cz for HDLC and in 3gpp TS 24.022.
Hi
 

Re: Speed Conversion

I don't think it would be difficult to build a speed converter based on, say, DS80C320, which is 8051-core micro with 2 independent full-duplex UARTs.
One serial port will read data at 64kbps and the other will send data at 9.6kbps.
On top of that this micro has: 256 bytes scratchpad RAM and Addresses and 64 kB RAM which can be used as a buffer ..
Data sheet can be obrained from:
**broken link removed**
or MAXIM-IC site ..
 

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