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avr-p40-8535 development board users manual all boards produced by olimex are rohs compliant revision a, october 2009 copyright(c) 2009, olimex ltd, all rights reserved page 1
introduction the avr microcontroller are low-power cmos 8-bit controller based on the risc architecture. the avr core combines a rich instruction set with general purpose working registers. all the registers are directly connected to the arithmetic logic unit (alu), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. the resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional cisc microcontrollers. the avr-p40-8535 is prototype board for 40 pin avr microcontrollers with stkxxx compatible 10 pin icsp connector . board features stk200 compatible icsp 5x2 pin connector for in-circuit programming with avr-pg1 or avr-pg2 jtag 5x2 pin connectr for in-circuit programming and debugging with avr-jtag-usb and avr-jtag-l rs232 tx, rx interface with max232 ic on socket 8 mhz crystal on socket (user can replace with any value) reset ic zm33064 reset button general purpose push button status led connected to pb0 via removable jumper dil40 microcontroller socket power plug-in jack selectable +3.3v / +5v power supply voltage regulator extension pin headers for each uc pin four mounting holes 3.3 mm (0.13") gnd bus vcc bus fr-4, 1.5 mm (0,062"), green soldermask, white silkscreen component print dimensions 100x80 mm (3.9x3.15") page 2
electrostatic warning the avr-p40-8535 board is shipped in protective anti-static packaging. the board must not be subject to high electrostatic potentials. general practice for working with static sensitive devices should be applied when working with this board. board use requirements cables: the cable you will need depends on the programmer/debugger you use. if you use avr-pg1 , or avr-jtag-l , you will need rs232 cable, if you use avr- pg2 , you will need lpt cable, if you use avr-isp500 , avr-isp500-tiny , avr- isp500-iso , or avr-usb-jtag you will need 1.8 meter usb a-b cable. hardware: programmer/debugger C one of the olimex avr programmers: avr- pg1, avr-pg2, avr-isp500, avr-isp500-tiny, avr-isp500-iso, avr-jtag-l, avr-usb-jtag. page 3
schematic page 4
board layout power supply circuit avr-p40-8535 is typically power supplied with min 9.0v dc max 12.0v dc, or min 6.0v ac max 9.0v ac. reset circuit avr-p40-8535 reset circuit includes pin 5 of icsp connector, pin 6 of jtag connector, pin 9 of u3, reset scheme C u1 and reset button (rst). clock circuit quartz crystal 8mhz is connected to avr microcontroller pin 12 (xtal2) and pin 13 (xtal1). page 5
jumper description j1 when 1-2 are shorted C rts is connected to terminal pin rts/dtr. when 2-3 are shorted C dtr is connected to terminal pin rts/dtr. default state is 1-2. led_j when this jumper is open C led is not connected. when this jumper is closed C led is connected to pin1 (t0/pb0) of the microcontroller. default state is closed. 3.3v when this jumper is open C lm317 output is 5v dc. when this jumper is closed C lm317 output is 3.3v dc. default state is open. 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. 2. if you want to operate with 3,3v power supply, remove r6 resistor. input/output status led with name led (red) C this led is connected to pin1 ( t0 / pb0 ) via jumper led_j. user button with name but - connected to pin5 (ss / pb4 ). reset button with name rst - connected to pin9 (reset). connector descriptions icsp pin # signal name functionality 1 mosi mosi / pb5 2 vcc +5v dc 3 not connected - 4 gnd ground 5 rst reset 6 gnd ground 7 sck sck / pb7 8 gnd ground 9 miso miso / pb6 10 gnd ground page 6
jtag pin # signal name functionality 1 tck pc2 2 gnd ground 3 tdo pc4 4 vref +5v dc 5 tms pc3 6 nsrst reset 7 vcc +5v dc 8 ntrst not connected 9 tdi pc5 10 gnd ground rs232 pin # signal name 1 cd - not connected 2 rxd 3 txd 4 dtr 5 gnd 6 dsr - not connected 7 rts 8 cts 9 ri - not connected note1: rts and dtr is connected to terminal pins via jumper j1, which position is describe bellow. note2: rx rs232 driver pins have to be connected to avr microcontroller pin - txd/pd1 (pin 15). tx rs232 driver pins have to be connected to avr microcontroller pin - rxd/pd0 (pin 14). pwr pin # signal name 1 power input 2 gnd page 7
mechanical dimensions page 8
available demo software avr-p40-8535 + atmega16 blink led ( c source and hex ) avr-p40-8535 + atmega16 uart demo code ( c source and hex ) avr-p40-8535 + atmega16 button demo code ( c source and hex ) avr-p40-8535 + atmega16 uart menu demo code ( c source and hex ) page 9
order code avr-p40-8535-8mhz completely assembled and tested with 8mhz oscillator avr-p40-8535/pcb only how to order? you can order to us directly or by any of our distributors. check our web www.olimex.com/dev for more info. revision history rev.a - created october 2009 page 10
disclaimer ? 2009 olimex ltd. all rights reserved. olimex?, logo and combinations thereof, are registered trademarks of olimex ltd. other terms and product names may be trademarks of others. the information in this document is provided in connection with olimex products. no license, express or implied or otherwise, to any intellectual property right is granted by this document or in connection with the sale of olimex products. neither the whole nor any part of the information contained in or the product described in this document may be adapted or reproduced in any material from except with the prior written permission of the copyright holder. the product described in this document is subject to continuous development and improvements. all particulars of the product and its use contained in this document are given by olimex in good faith. however all warranties implied or expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded. this document is intended only to assist the reader in the use of the product. olimex ltd. shall not be liable for any loss or damage arising from the use of any information in this document or any error or omission in such information or any incorrect use of the product. page 11

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