AVR-USB-STK Olimex Ltd., AVR-USB-STK Datasheet - Page 8

• Manufacturer Part Number: AVR-USB-STK
• Description: MCU, MPU & DSP Development Tools DEV BRD FOR AT90USB162
• Manufacturer: Olimex Ltd.

Specifications of AVR-USB-STK

• Processor To Be Evaluated: AT90USB162
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB, SPI
• Dimensions: 77 mm x 72 mm
• Operating Supply Voltage: 2.7 V to 5.5 V
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Silicon Core Number: AT90
• Silicon Family Name: AT90xxx
• Kit Contents: Board
• Rohs Compliant: Yes
• Tool Type: Development Kit
• Cpu Core: AVR 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 1701519 25R4415

BOARD LAYOUT:
POWER SUPPLY CIRCUIT:
RESET CIRCUIT:
AVR-USB-STK can be powered from the USB port or from external power
supply. The polarity of the external power supply doesn't matter as there is
diode bridge at the front stage, this making possible AVR-USB-STK to be
powered with AC or DC power adapters. The input voltage should be in the
range of 7-12VDC or 6-9VAC. The board power consumption is about 15
mA.
AVR-USB-STK reset circuit consist of R4 pullup, RST button and R9
current limiting resistor. When RST button is pressed logical 0 is fed to the
AT90USB162 reset input. As the reset port may be configured by the
software as GPIO and output the current limiting resistor R9 is connected
between the RST button and the microcontroller.