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AT90S8535 demo board

atoomnetmarc·AVR-demo-board·at90s8535/Kicad/at90s8535.kicad_pcb

AT90S8535 demo board layout, top view — open source AVR/Arduino board by atoomnetmarc

About the AT90S8535 demo board

AT90S8535 demo board is an open source AVR/Arduino PCB design by atoomnetmarc, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 99.1 × 99.1 mm, with 41 components from 27 distinct parts.

Its main chip is the AT90S8535-8PC, from the AVR/Arduino family. Other key parts include the L7805, 74AHC125D, AMS1117-3.3, MAX809M and 74AHCT125D. By type, the board carries 12 capacitors, 10 connectors, 8 ICs, 6 resistors, 3 diodes and 1 crystal.

From the project

AVR demo boards for old AT90S* microcontrollers.

You could use MightyCore to program a supported MCU (ATmega8535, ATmega16, ATmega32, ATmega164, ATmega324, ATmega644 and ATmega1284) using Arduino IDE or PlatformIO.

To be useful as an Arduino board, you must first burn a bootloader using the Arduino IDE. Use the instructions from the MightyCore GitHub page to burn the bootloader.

Verify the bootloader burn by compiling the blink sketch and uploading it to the board using the USB UART PMOD (or your own compatible serial cable). After uploading LED D8 should blink.

Main components on the AT90S8535 demo board

AT90S8535-8PCL780574AHC125DAMS1117-3.3MAX809M74AHCT125D

AT90S8535 demo board bill of materials (BOM)

41 components, 27 distinct parts.

QtyPartRefs
1
AT90S8535-8PC
U1
1
L7805
U2
3
74AHC125D
U3, U6, U11
1
AMS1117-3.3
U4
1
MAX809M
U5
1
74AHCT125D
U8
1
8MHz
Y1
1
AVR-ISP-6
J1
1
AVR-JTAG-10
J2
1
Barrel_Jack_Switch
J3
1
Pmod host UART
J4
2
Pmod host SPI
J5, J9
1
Pmod host I2C
J6
2
Pmod host GPIO
J7, J8
1
Pmod host SPI
J10
1
SW_Push
SW1
1
1N5819
D1
1
BAV99
D4
1
Blue
D8
2
15pF
C1, C2
Show 7 more
QtyPartRefs
1
100uF 16V
C3
2
33uF 16V
C4, C9
2
100n
C5, C14
5
100n
C7, C8, C11, C17, C18
3
10k
R1, R7, R16
1
100R
R8
2
4k7
R20, R21

AT90S8535 demo board design files

The KiCad project lives in the atoomnetmarc/AVR-demo-board repository on GitHub; these links point at the commit this page was built from.

AT90S8535 demo board: common questions

What microcontroller does the AT90S8535 demo board use?

The AT90S8535 demo board is built around the AT90S8535-8PC, from the AVR/Arduino family.

How big is the AT90S8535 demo board?

The AT90S8535 demo board measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the AT90S8535 demo board?

41 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the AT90S8535 demo board design files?

From the atoomnetmarc/AVR-demo-board repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the AT90S8535 demo board design in my own project?

Yes, under the terms of its Apache-2.0 license, which atoomnetmarc chose for the repository.

Can I test firmware for the AT90S8535 demo board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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