89S8252 Flash Microcontroller Board
Educational hardware and softwareplatform for the Microcontroller Basics course
Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD 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.
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The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.
Extra info / Update
Also, a timing problem was discovered in the original download utilities. Both problems have been addressed and an update is available at: www.b-kainka.de/basismufaq.htm
Component list
R1,R2,R6,R7 = 27kOhm
R3,R5 = 1kOhm
R4 = 47kOhm
P1 = 10kOhm preset H
Capacitors:
C1,C2 = 22pF
C3,C5,C6,C14,C15 = 100nF ceramic
C4,C7-C11 = 10µ F 63V radial
C12 = 1000µ F 16V radial
C13 = 100µ F 10V radial
Semiconductors:
D1,D2 = zener diode 4V7, 500 mW
D3 = BAT85
D4 = 1N4001
IC1 = AT89S8252 24PC
IC2 = HC126
IC3 = 74HCT573
IC4 = 62256 120 ns
IC5 = 74HCT00
IC6 = MAX232
IC7 = 7805
Miscellaneous:
K1,K2 = 9-way Sub-D socket (female), angled pins, PCB mount
K3 = 14-way boxheader
K4-K7 = 8-way SIL pinheader
K8 = 34-way boxheader
K9 = socket for mains adaptor
S1 = pushbutton, make contact
X1 = 11.0592 MHz quartz crystal
PCB, order code 010208-1
Disk, project software, order code 010208-11
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