AVR-P20B-10MHZ Olimex Ltd., AVR-P20B-10MHZ Datasheet - Page 6

• Manufacturer Part Number: AVR-P20B-10MHZ
• Description: MCU, MPU & DSP Development Tools PROTOTYPE BRD FOR STK200 20PIN
• Manufacturer: Olimex Ltd.

Specifications of AVR-P20B-10MHZ

• Processor To Be Evaluated: AVR-PG1B, AVR-PG2B
• Data Bus Width: 8 bit
• Interface Type: RS-232
• Dimensions: 100 mm x 80 mm
• Operating Supply Voltage: 3.3 V, 5 V
• External Height: 80mm
• External Width: 100mm
• Mcu Supported Families: AVR
• Rohs Compliant: Yes
• Tool Type: Prototyping Board
• Core Architecture: AVR
• Cpu Core: AVR 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 1776314 52R3437 AVR-P20-10MHZ

JUMPER DESCRIPTION:
J1
LED_J
3.3V
WARNINGS!!!
1. The 3.3V jumper selects the power voltage to be 5V (open) or 3.3V (closed).
MAX232 can operate only at 5V power supply so if you are working with 3.3V you should replace it
with MAX3232 which works at 3.3V power supply.
INPUT/OUTPUT:
2. If you want to operate with 3,3V power supply, remove R4 resistor.
Default state is open.
When this jumper is open – LED is not connected.
Microcontroller.
Default state is closed.
When this jumper is open – LM317 output is 5V DC.
When this jumper is closed – LM317 output is 3.3V DC.
When 1-2 are shorted – RTS is connected to terminal pin RTS/DTR.
When 2-3 are shorted – DTR is connected to terminal pin RTS/DTR.
Default state is 1-2.
Status Led with name LED (red) – this led is connected to PIN19 ( PB7 / SCK ) via
jumper LED_J.
User button with name BUT - connected to PIN6 (PD2 / INT0 ).
Reset button with name RST - connected to PIN1 (RESET).
When this jumper is closed – LED is connected to pin 19 (PB7/SCK) of the
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