About the article

Programmer for Freescale 68HC(9)08

First steps in 8-bit development

Programmer for Freescale 68HC(9)08
Freescale is one of the leaders in the microprocessor and microcontroller market, backing up its products with a very comprehensive range of support products and high-performance development tools. For the price of a 74xx TTL IC, there’s something to delight anyone nostalgic for the 68HC11. Here’s a programmer that lets you program Flash M68HC08 and 68HC908 family microcontrollers.
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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.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list
R1 = 1M?
R2 = 10k?
R3,R5,R9 = 680?
R6,R7,R8 = 1k?
C1,C6 = 22 pF
C2-C5 = 1µF 16V
C9,C10 = 47µF 16V
C16, C17 = 100nF
D1 = 1N4004
D2 = 1N4148
D3 = zener diode 9.1V / 400mW
D4 = LED, red, 5mm
IC1 = 74AC04N
IC2 = MAX232 (Maxim)
IC3 = 7805
S1 = momentary switch, push-to-make
X1 = 9.8304MHz quartz crystal
K1 = HE10 header, 2 rows of 8 contacts
K2 = 9-pin sub-D socket (female), PCB mount
K3 = snap-off pinheader, 1 row of 2 contacts (Power)
JP1 = snap-off pinheader, 2 rows of 3 contacts
PCB, ref. 060263, from The PCBShop
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