[En-Nut-Discussion] Design based around the ethernut1.3g

[Richard Dawodu]

Hello Harald,

I have been playing with my hardware and noticed another difference when
running "basemon.c". I noticed that only one LED connected to the RTL
stays/flashed on compared to the actual ethernut board where both LED
flashes on/off periodically.

I planning to order some AHC373 to try, just for more information I am using
the BS62LV256 70ns SRAM to be exact.

thank you.

-----Original Message-----
From: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de]On Behalf Of Harald Kipp
Sent: 11 June 2005 20:20
To: Ethernut User Chat (English)
Subject: RE: [En-Nut-Discussion] Design based around the ethernut1.3g


Rich,

Yes, Basemon option B sends bogus packets.

Basemon's RAM test is not very versatile. It may not detect
timing problems. It's main purpose is to find shorted or open
wires and the last RAM address as well as the number of banks.

We have also used 70 ns RAMs without problems. However, we do
extensive test before selecting new chips. RAM timing on
Ethernut is indeed highly critical.

You may also check the HC573, optionally replace it with an
AHC type. However, these chips are typically very noisy,
regarding EMC.

Harald

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