• on Computer/Software/Internet
  • Published in issue 4/2004 on page 0
About the article

Drop-in Microcontroller Board

An 80C32 jack-of-all-trades

Drop-in Microcontroller Board
At the heart of this remarkably compact microcontroller board you’ll find an ingenious bit of integration technology. The combination acts as a versatile plug-in module for lots of applications requiring some form of intelligent control. Thanks to the extensive software that comes with the board and the presence of a PC interface, our drop-in board is excellent for hardware development, too.As many of our readers will be able to confirm, the majority of microcontroller boards look very similar. If the microcontroller used has no program memory, an EPROM is added. Similarly, if there is a lack of RAM, the problem is solved by adding an external RAM device like the 62256. The lot is then complemented with a few logic gates and hey presto we have a basic microcontroller system.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Resistors:
R1 = SIL array 8 x 10kOhm
R2,R3 = SIL array 4 x 10kOhm
R4,R5 = 10kOhm
Capacitors:
C1,C2 = 33pF
C3,C4,C5,C7-C11 = 100nF
C6 = 10µ F 16V radial
Semiconductors:
IC1 = DS80C320QCL (44-pin PLCC)
IC2 = PSD813F1 (RS Components # 417-5726)
IC3 = MAX701CPA
IC4 = 74HCT244P
IC5 = 74HCT04
Miscellaneous:
K1-K6 = 10-way SIL-header
K7,K9 = 14-way boxheader
K8 = 25-way sub-D plug (male), angled pins, PCB mount
L1 = 1.5 µ H miniature choke
S1 = pushbutton, 1 make contact
X1 = 11.0592MHz quartz crystal
44-way PLCC socket
50-way PLCC socket
PCB, order code 020148-1
Example project file, 020148-11, Free Download
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