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Re: [avr-gcc-list] New ATmega parts
From: |
Uwe Bonnes |
Subject: |
Re: [avr-gcc-list] New ATmega parts |
Date: |
Fri, 3 Oct 2003 14:05:42 +0200 |
>>>>> "Russell" == Russell Shaw <address@hidden> writes:
Russell> Uwe Bonnes wrote:
...
>> did you find any announcement of an MEGA running with 16 MHz at 3.3V?
>>
>> Modern FPGAs are no longer 5 Volt tolerant, so 3.3 Volt is needed as
>> supply. Trading FPGA speed agains CPU speed is a drawback. And
>> Busswitches to translate between 3.3 and 5 Volts) are hard to get
>> by. And Level Translator imply a waitstate, as they eat a lot of the
>> 16.6 ns Access time needed for 0-weaitstate access.
Russell> xilinx spartan-2 and altera acex inputs are 5V tolerant.
I talked about "modern" FPGA. Spartan 2 e.g. has a lot less Block Ram and no
multipliers like e.g. Spartan 3. But I admit that spartan 2 is still the
workhorse here.
Bye
--
Uwe Bonnes address@hidden
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------