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- Path: newsgate.sps.mot.com!cardhu
- From: r12110@email.sps.mot.com (Jeff Loeliger)
- Newsgroups: comp.sys.m68k
- Subject: Re: MC68332/TPU programming
- Date: Thu, 28 Mar 96 13:18:17 GMT
- Organization: Motorola
- Message-ID: <4je3ip$vt8_001@sps.mot.com>
- References: <31581C41.104A@telogy.com>
- NNTP-Posting-Host: cardhu.sps.mot.com
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-
- Christine,
-
- The TPU was designed to generate complex timing waveforms and as such
- was not designed to just divide clocks. If you just want to divide
- fast clocks I would suggest looking at the CTM4 on the 68336. However
- the fastest clock it can generate use the PWM sub-module is 1/4 the system
- clock.
-
- For clock speeds that are in the range of 1/2 the system clock
- you will need to use external hardware.
-
- -Jeff
-
- ________________________________________________________________
- \ Jeff Loeliger www Motorola SPS \
- \ \Y/ East Kilbride, Scotland\
- \ email: jeffl@mekb5.sps.mot.com (#) Phone: +44-1355-56-5400 \
- \ or : r12110@email.sps.com.com | FAX : +44-1355-23-5260 \
- \_______________________________________________________________\
-
-
- In article <31581C41.104A@telogy.com>,
- Christine Price <cprice@telogy.com> wrote:
- >I'm learning how to design with the MC68332. I have an existing design
- >that I must retro-fit with this new processor. The old design incor-
- >porates a 12.288MHz clock. It also derives a divide by 4 signal from
- >this clock. The problem I have is that it would be nice to run the new
- >processor at 20MHz but I can't seem to find a way to generate both the
- >12.288MHz and the 3.072MHz signal from the system clock using the TPU.
- >Does anyone know of a way to do this?
- >
- >Thanks,
- >Christine Price
-