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Hi people, I wanted to expand the external memory on the 563xx EVM boards, but it doesn't seem possible since the EVM boards don't have any memory expansion connectors. So I was thinking of building a whole new DSP board just by 'following' the EVM's schematics and add as much external memory (SRAM) as I wish. Is it possible to succesfully build a working DSP board this way? Is there any firmware issue or other things I should be aware of? Has anyone had any experience in this matter? Thanks in advance! Henry _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com |
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DSP board
Started by ●January 31, 2001
Reply by ●February 1, 20012001-02-01
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Henry- > Hi people, I wanted to expand the external memory on the 563xx EVM >boards, but it doesn't seem possible since the EVM boards don't have any >memory expansion connectors. So I was thinking of building a whole new DSP >board just by 'following' the EVM's schematics and add as much external >memory (SRAM) as I wish. Is it possible to succesfully build a working DSP >board this way? Is there any firmware issue or other things I should be >aware of? Has anyone had any experience in this matter? That should work fine. the schematics are accurate, and the design is very basic and you should have no problem with layout, component placement, or other assembly issues. You might start with the 56311 EVM board; for external memory accesses it uses AA0 for Chip Select and either DAB15 or AA3 to select 64k x 24 unified or separate 32k x 24 X: and Y: areas. The approach used on the 56311 EVM is flexible from a software algorithm point of view, but still simple to implement in hardware -- it would be a good approach to expand upon. Jeff Brower DSP sw/hw engineer Signalogic |
