My first completely self designed/assembled MCU Board using the 8039 (MCS-48)
License:
GNU General Public License
Current State:
working
Current version:
0.1
Download:
-
What’s this project about?
8039 board top view
This was my first (working) self designed microcontroller board. I get interested in this microcontroller
after opening a control unit for a electronic contruction kit from "Kosmos". The PCB layout was designed
on a sheet of paper, and was afterwards painted on my Commodore 64 with GEOS. I was very happy to see, that
eight pixels were exacly matching the distance from one pin to another (1/10").
I used the board to control the two stepper motors from an old daisy wheel printer.
Since I didn't had an assembler, I had to encode all machine code instructions by hand !
Remember that this processor family was the predecessor of Intels famous 8051 chips...
PCB Layout
Get this layout as .eps .
At that time I was very proud that I didn't need even one jumper on the board.
On the right side you can see the strip with all I/O channels I needed.
8039 Specification
Manufacturer: Intel
RAM: 128 Bytes
ROM: none (8049: 2KBytes)
I/O Ports: two bidirectional 8 bit ports
Pinout
the book I used
(pic from web)
This is the 8039 pinout. It was cheaper for me to get a 8049. This version is nearly the same as the 8039,
but with internal ROM. By disabling the internal ROM you could use it as 8039.
This is the 8039 pinout. It was cheaper for me to get a 8049. This version is nearly the same as the 8039, but with internal ROM. By disabling the internal ROM you could use it as 8039.
