new PIC microcontroller
Mark Lottor
basically a super-upgraded version of the 18-pin 16C56. Has a built-in
four channel 8-bit A/D converter, runs on 3-6v, has 1K (14-bit) program
memory, 36 registers, 12 special-function registers, 8 level hardware
stack (and they eliminated the silly page mode problems), and 13 I/O
lines. The A/D can be disabled (uses port A).
An interrupt is available on the RTCC input. New sleep modes exists and
wakeups can occur after an A/D conversion completion (20us), or when any
of 4 bits of port B change state. Also, wakeup now continues with the
next instruction instead of jumping back to 0 (the new reset vector too).
The chip can also can be programmed over a two-wire serial line. It
appears to be a single part that you can program for different oscillator
options, unlike now where you have to buy 1 of 4 different parts.
Parallax supposedly has a $99 upgrade to their programmer for the chip
but I haven't called them yet. Microchip says it will ship in quantity
in November, probably long before you get your obsolete 16-pin Motorola
micros. They also said a new version of the PIC will come out by the end
of the year, and it will have EEPROM program memory.
-mkl
Aaron Wohl
havn't got a line on actually getting a chip yet... Let me know if you
find a source. I will let you know what the paralex package looks like.
Aaron
Henry Spencer
>The chip can also can be programmed over a two-wire serial line...
The real question is: are the programming specs in the datasheet?
It's really quite irrelevant how many wires are involved if you have
to buy a commercial programmer anyway.
--
MS-DOS is the OS/360 of the 1980s. | Henry Spencer @ U of Toronto Zoology
-Hal W. Hardenbergh (1985)| he...@zoo.toronto.edu utzoo!henry
Dave Platt
>The real question is: are the programming specs in the datasheet?
>
>It's really quite irrelevant how many wires are involved if you have
>to buy a commercial programmer anyway.
I spoke with a Microchip representative at the Embedded Systems
Conference a couple of weeks ago, and raised the issue I'd read about on
the Net: that Microchip seems to keep its programming specs proprietary
rather than publishing them.
His response: "No, that's not true. It's true that we don't include
them in the data sheet. Often, the data sheets are printed up before
the actual production runs of the parts. Once we're actually in
production, and have had a chance to test the programming algorithms
with the real parts, we're quite willing to provide this information
upon request. All you need to do is call us. I wonder if you could
distribute this information for me, the next time the issue comes up."
So... there you have it.
And... yes, the preliminary data sheet for the 16C71 (DS30150B) does
describe the serial programming protocol - it's on pages 54 through 56.
The parallel programming writeup is in a separate document (DS30153).
--
Dave Platt VOICE: (415) 813-8917
Domain: dpl...@ntg.com UUCP: ...netcomsv!ntg!dplatt
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Byron A Jeff
>In article <BvvA...@zoo.toronto.edu> he...@zoo.toronto.edu (Henry Spencer) writes:
>
>>The real question is: are the programming specs in the datasheet?
>>
>> upon request]
This seems to be true enough. As fast as I could hang up my modem and call
Microchip (602-963-7373) I was told that was exactly the case and was routed
to the local sales office (Hi Barbara!). I'll be picking up the specs
for the 16C5X series tomorrow morning. Now I'll have a complete set of
PIC and 68HC705 series development tools.
BTW the Parallax BBS has the PIC assembler and some software available for
download for the cost of the phone call. The number is 916-721-9607.
Since no non disclosure was involved I assume that I could share the info.
I'll do it the same was Microchip is: available upon request. However don't
send mail yet because I don't have them yet, they won't be in electronic form,
and I don't need my mailbox swamped. I a couple of days I'll post the process
of getting the specs. Fair enough?
Hope this helps.
BAJ
---
Another random extraction from the mental bit stream of...
Byron A. Jeff - PhD student operating in parallel!
Georgia Tech, Atlanta GA 30332 Internet: by...@cc.gatech.edu