Re: strange read with a 6502...

From: Gerrit Heitsch <>
Date: Wed, 30 Mar 2016 22:08:28 +0200
Message-ID: <>
On 03/30/2016 09:44 PM, didier derny wrote:
> if I remove the board and inject a signal on A0
> I get the signals on other pins   a few mv
> a little bit higher on CS
> I checked with the oscilloscope
> CS / PHI2  with the code odd/even seems ok   cs go low on falling edge
> of phi2  / go up on raising edge of phi2  (same for odd and even)

Huh? According to what I could find, CS is low_active on that chip. 
Meaning you need to have CS low when PHI2 is high.


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Received on 2016-03-30 21:00:02

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