Re: TI-H: diskdrive 2 calc

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: diskdrive 2 calc
From: Greg Hill <gregh@xmission.com>
Date: Thu, 27 Aug 1998 09:38:30 -0700 (PDT)
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <l03130365b20a451a911c@[192.168.1.66]>
Reply-To: ti-hardware@lists.ticalc.org


> Most likely if you aren't using a controller you will probably need to time
> things exactly on the dot or else it will fall apart.  Like serial.
> 
> I could whip up an AVR that did it fine in 10 minutes.  The problem with
> the PIC is that it is literally 4 times slower than the AVR.
> 
> 1 instruction cycle on an 8MHz AVR is 125ns.  1 instruction cycle on an
> 8MHz PIC is 500ns.

So.... if he wants to use a PIC, let him. PICs can go much higher than 8
MHz, as AVRs probably can also. The PIC16C67, for example, is rated to 20
MHz. I believe there are several models which can go to 33 MHz.

-- 
Greg Hill
greg-hill@bigfoot.com
www.comports.com/link

Follow-Ups:

Re: TI-H: diskdrive 2 calc

From: Grant Stockly <gussie@alaska.net>

Re: TI-H: diskdrive 2 calc

From: Grant Stockly <gussie@alaska.net>

References:

Re: TI-H: diskdrive 2 calc

From: Grant Stockly <gussie@alaska.net>