Article

Atmel AVR Micro Programmer

for 89Cx051 with up to 4k of program memory

This programmer is suitable for programming the three popular 20-pin Atmel processors, the 89C1051, 89C2051 and the new 89C4051 with 4 k of program memory.There is a new arrival in the Atmel family of powerful yet inexpensive MCS51-compatible microcontrollers with flash memory (PEROM): the 89C4051 boasts 4 kBytes of program memory. Besides the program memory capacity all members of the family have the following features:– 128 bytes RAM– 15 I/O port bits– 2 16-bit timer/counters– Interrupt architecture with two priorities and five vectors– Programmable full-duplex serial port– Precision analogue comparator– Integrated clock/oscillator circuit

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Materials

010005-PCB.pdf

010005-11.zip

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.

PCB

Download Gerber file: 010005-1.zip

Extra info / Update

The author has supplied yet another update for the Windows software. The latest version now reads signature bytes correctly in all cases. Free Download, file number 010005-11, September 2001. The firmware in controller no. 010005-41 remains unchanged. The author has come up with another new release of the software, which may be downloaded free of charge from our website. The old version contained a bug causing incorrect programming of the last few bytes in the 4K device (4051).

Component list

Resistors:
R1 = 8kOhm 2
R2 = 100Ohm
R3 = 8-way 10kOhm SIL array
R4,R5 = 1kOhm
R6 = 1210Ohm
R7 = 274Ohm
R8 = 2260Ohm
R9,R10 = 10kOhm
R11 = 4kOhm 7
R12,R13,R14 = 1kOhm 5
R15 = 2kOhm 2
Capacitors:
C1,C4-C10 = 10µ F 63V radial
C2,C3 = 22pF
C11 = 1µ F 25V radial
C12,C13,C14 = 100nF
Semiconductors:
D1 = 1N4148
D2 = 1N4001
D3 = zener diode 4V7, 500 mW
D4,D5,D6 = LED, green, high efficiency
T1,T3 = BC557B
T2 = BS170
IC1 = AT89C2051-12PC (order code 010005-41)
IC2 (K3) = 24-way zero-insertion force (ZIF) socket
IC3 = 74HC373
IC4 = MAX232
IC5 = 7805
IC6 = LM317T
Miscellaneous:
JP1 = jumper
K1 = 9-way Sub-D socket (female), PCB mount, angled pins
K2 = mains adaptor socket
X1 = 11.0592MHz quartz crystal
Enclosure, size 137 x 95 x 25 mm (e.g., Pactec type WM46)
PCB, order code 010005-1
Disk, project software, order code 010005-11 (no free download)