Re: has anybody tried to replace a vic or vic II chip with a board containing a propeller ?

From: Ingo Korb <>
Date: Mon, 27 Feb 2012 22:27:35 +0100
Message-ID: <>
Nate Lawson <> writes:

> Except for Actel, FPGAs require an external microcontroller for loading
> the SRAM on each power-up. That makes it more expensive and larger
> footprint. FPGAs are overkill for single-chip replacement.

There are quite a few non-Actel FPGAs that can automaticall configure
themselves on powerup without an external microcontroller, usually from
a serial or parallel flash chip connected to the FPGA. A subset of those
include nonvolatile storage for the configuration in the FPGA itself,
one example that I can think of is the Xilinx Spartan 3AN series.

> For example, you'd probably need a few tuned op-amps to do the
> integration of the SID filter.

Why would you use external analog parts for that instead of filtering
the signal in the digital domain?


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Received on 2012-02-27 22:00:05

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