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CPUShack
Joined: 16 Jun 2003
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Location: State of Jefferson, USA
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 Posted: Sun May 16, 2010 2:49 pm Post subject: Motorola XC68040HRC25M |
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Anyone know what the 'H' is?
Usually its a temperature modifier, but I dont see it documented anywhere.
Tis on some 68040s I recently got circa 1993 with the heatsink
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Xaar
Joined: 30 Sep 2009
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Location: Germany
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| Posted: Thu Oct 13, 2011 2:16 am Post subject: |
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I'll pick up this thread..
I got such an 68040 today (Motorola XC68040HRC25M).
Does anyone know what the "H" stands for?
Best regards, Xaar.
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vezhlys
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Xaar
Joined: 30 Sep 2009
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| Posted: Fri Oct 14, 2011 1:58 am Post subject: |
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Thanks for that info 
Best regards, Xaar.
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Fri Oct 14, 2011 2:32 am Post subject: |
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different family but Motorola has used this part number format elsewhere
The oscillator module provides the reference clock for the MCU system and bus.
Two types of oscillator modules are available:
• MC68HC08xxx— built-in oscillator module (X-tal oscillator) that requires an external crystal or ceramic-resonator.
This option also allows an external clock that can be driven directly into OSC1.
• MC68HRC08xxx — built-in oscillator module (RC oscillator) that requires an external RC connection only.
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Fri Oct 14, 2011 3:27 am Post subject: Re: Motorola XC68040HRC25M |
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| CPUShack wrote: | Usually its a temperature modifier, but I dont see it documented anywhere.
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So if working on that train of thought.. these are the parts available with the extra modifier
MC68040BRC33
MC68EC040BRC33
MC68LC040BRC33
MC68030CRC25x
MC68030CRC33x
SC414074CRC25
XC68040HRC25x
XC68040HRC33M
MC68040LRC40A
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