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AT90USB162

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An AT90USB162 development board from Olimex

This was another development board that I purchased a long time ago, its a board for the AT90USB162 from Olimex and its a good, solid option

Specs

Lets look at the specs of the AT90USB162

The microcontroller combines 16KB ISP flash memory with read-while-write capabilities, 512B EEPROM, 512 bytes SRAM, 22 general purpose I/O lines, 32 general purpose working registers, two flexible timer/counters with compare modes and PWM, USART, programmable watchdog timer with internal oscillator, SPI serial port, debugWIRE interface for on-chip debugging and programming, and five software selectable power saving modes.

The device operates between 2.7-5.5 volts.

Program Memory Type Flash
Program Memory Size (KB) 16
CPU Speed (MIPS/DMIPS) 16
Data EEPROM (bytes) 512
Capture/Compare/PWM (CCP) 1
Max 8 Bit Digital Timers 0
Number of ADCs 0
ADC Channels 0
Max ADC Resolution (bits) 0
Number of Comparators 1
Temp. Range Min. -40
Temp. Range Max. 85
Operation Voltage Max.(V) 5.5
Operation Voltage Min.(V) 2.7
Pin Count 32
Low Power No

 

Now lets add in the AVR-USB-162 development board from Olimex

You have the microcontroller above and you also get the following on the board

 

  • ICSP 5×2 pin connector for in-circuit programming with AVR-ISP-MK2 (you generally don’t need to use ICSP as you can program via USB)
  • Debug Wire could be performed by 3 wires connected to ICSP (AT-JTAGICE-MK2 have such lose wire connector which to be used, you need VCC, GND, RST signals only)
  • USB 2.0 connection
  • User button BUT (can be used to enter bootloader mode after reset)
  • Reset button RST
  • Takes power from USB so there is no need for external adapter
  • You can use an external power supply and voltage regulator if USB can’t provide enough power. I always recommend this option to be honest.
  • Quartz crystal oscillator circuit 8Mhz
  • Extension pin headers for each uC pin

 

Summary

A decent development board for a fairly capable microcontroller. When you factor in that the cost of the board is only 8 Euros its a very good price. The board is good quality and there is a substantial prototyping area, if you need it.

The board will work with Microchip (used to be Atmel) Studio and you do not need to buy an external programmer, if you need a debugger thats a different story but this is quite often the case anyway

Olimex supplies a couple of examples, as you can see in the links below, these are fairly standard examples but at least you are not on your own.

Using this a mouse, keyboard seems to be a fairly interesting use case

Links

DOCUMENTS

HARDWARE

SOFTWARE

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Boards

AT90USB162 development board

The AVR-USB-STK board is a nice development board allowing you to explore the AT90USB162  . This board has a USB connector, a Joystick, a RS232, a SD-MMC card, an Audio output, an ICSP connector and an extension connector.

The AT90USB162 comes  pre-programmed with a bootloader which allows code to be programmed inside the chip without any external programmer, atmel supplies a piece of software that you can use to load your hex code to the device.

The AT90USB162 is a high-performance, low-power Atmel 8-bit AVR RISC-based microcontroller combines 16KB ISP flash memory with read-while-write capabilities, 512B EEPROM, 512 bytes SRAM, 22 general purpose I/O lines, 32 general purpose working registers, two flexible timer/counters with compare modes and PWM, USART, programmable watchdog timer with internal oscillator, SPI serial port, debugWIRE interface for on-chip debugging and programming, and five software selectable power saving modes. The device operates between 2.7-5.5 volts.

A nice easy board to get up and running, olimex supply schematics, a manual and a few code examples and you will see from later I was able to use a low cost USBASP programmer  to program the device using the 10 pin header that you can see in the picture below. There are enough on board features to play with and the pins from the microcontroller come out to a header which is handily located on the side of the board, easy to make your own adaptor board if you wanted.

avr usb stk

avr usb stk

I used a USBAsp with no issues and the khazama AVr programmer. The code was written in MikroC pro for AVR

 

Code

In this example we simply toggle the entire PORTD on and off, there is an onboard LED which will flash on and off, you can also connect another LED as well if you like to test.

[codesyntax lang=”cpp”]

void main() {


  DDRD = 0xFF;           // Set direction to be output
  
  do {

    PORTD = 0x00;        // Turn OFF diodes on PORTD
    Delay_ms(1000);      // 1 second delay
    
    PORTD = 0xFF;        // Turn ON diodes on PORTD
    Delay_ms(1000);      // 1 second delay
  } while(1);            // Endless loop
}

[/codesyntax]

 

Links
AVR-USB-STK Atmel AT90USB162 USB Development Board – UK

USB ASP USB ISP 5V AVR SCM Programmer Adapter 10 Pin Cable & Case ATMEGA8 ATMEGA128 For Arduino Support Win 7 64Bit

OLIMEX AVR-USB-STK AT90USB162, USB, ICSP, SD/MMC CARD, DEV BOARD – US

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