[vdr] Re: Increasing SDRAM on DVB cards

[Andreas Schultz <aschultz@warp10.net>]

HI Hermann,

On Wednesday 18 June 2003 10:28 am, Hermann Gausterer wrote:

[...]

> you told me that there are two chips .. how does this fit togehter?
> for what is the other 2mb chip for? it can not be connected anywhere
> else on the av7110 !

There appears to be a bit confusion here. As i see it, there are _three_ RAM 
chips (as reference: http://rk.ods.org/dvb/vorderseite-13.jpg):
The dual-ported RAM interfacing to the SAA (the big square one with the tree 
on it, CY7C024V-25AC), the SDRAM chip for OSD and MPEG buffering (the left of 
the two chips beneath the DSP, GM72V161621CT10K) and a normal 60ns DRAM chip 
(the right chip beneath the DSP, HYB31181658ST-60).

Page 8 of teh spec. cleary shows that the normal DRAM is attached to the 
extension bus which has 6 chip select lines. The SDRAM is attached to 
completely seperate bus (page 9/10) which has 2 chip select lines.

Andreas






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