HP 1820-1691 microprocessor pinout

From: Christian Fandt <cfandt_at_netsync.net>
Date: Tue Aug 28 20:30:18 2001

Hmmm, it could be an F8 Tony. My HP9825 books are buried at the back end of
the attic but I recall the F8 microcontroller was a fairly common MCU that
HP used in these applications. Try finding an F8 pinout (3851 IIRC, by
MOSTEK) and see how it works out.

Found anything on it in the meantime?

Regards, Chris
-- --

Upon the date 10:14 PM 8/12/01 +0100, Tony Duell said something like:
>Does anyone have the pinout of the HP 1820-1691 microprocessor (HP may
>have called it a nanoprocessor in some manuals!) to hand?
>
>This is a custom chip (AFAIK), 40 pin ceramic DIL package that was used as
>a controller in a number of HP devices in the late 1970s. It was certainly
>used in the HP 98034 HPIB interface and HP 98035 clock (for the HP9825
>calculator), and may have been used in other peripherals (HP 9885 disk
>drive, some plotters/printers?).
>
>If anyone has a pinout (or a schematic of a device that uses said
>processor), could they post (or e-mail me) a text file giving the names
>of the signals on as many pins as possible.
>
>Thanks in a advance for any help
>
>-tony

Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt_at_netsync.net
        Member of Antique Wireless Association
        URL: http://www.antiquewireless.org/
Received on Tue Aug 28 2001 - 20:30:18 BST

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