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Subject: Re: Schematics for JBS20 needed (ATA 44 pins)

Re: Schematics for JBS20 needed (ATA 44 pins)

From: Linus Nielsen Feltzing <>
Date: Thu, 03 Jun 2004 13:32:02 +0200

Markus Grebenstein wrote:

> OK thanks. Do you know if the violtage on PIN 42 (Motor) and/or 41
> (Logic) should be 5V all the time, when teh processor is running?

On the newer Studio models, the hard drive power can be controlled by
the CPU, with port pin PB4. However, the firmware enables the HD power
early in the boot sequence and never turns it off again.


Received on 2004-06-03

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