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STK504 Datasheet(PDF) 16 Page - ATMEL Corporation |
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STK504 Datasheet(HTML) 16 Page - ATMEL Corporation |
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16 / 21 page  Troubleshooting Guide This section contains information on common problems and solutions. LCD problems Problem Cause Solution Nothing is shown on the LCD LCD not connected to AVR Connect the flat cable between the AVR SEGMEN PINS and LCD PINS connectors. See also Using the LCD. Nothing is shown on the LCD Faulty LCD initialization Check your code that initializes the LCD driver. The Application Note "AVR065 LCD driver for the STK502 LCD" describes how to control the LCD-display Nothing is shown on the LCD The update frequency is not correct. Check the clock prescaling in your initialization. Check that the clock source selected on STK504 is correct. See STK504 Clock Sources for more information. Some LCD segments seem stuck. Some of the port pins used for driving the LCD are also connected to something else. Check that the pins used to drive the LCD are not connected to something else on either STK500 or STK504. Programming problems Problem Cause Solution ISP programming does not work ISP cable is not connected Connect a 6-pin cable between the ISP6PIN connector on STK500 and the ISP connector on STK504. See also Programming the AVR. ISP programming does not work The reset signal is not connected to the AVR on STK504 Mount a jumper on pin 6 and 8 on PORTG. ISP programming does not work The AVR is running at too low clock frequency. Make sure the clock switch on STK500 is in the right position. In the Board page of the programming dialog in AVR Studio, try reducing the clock frequency to less or equal to the frequency the AVR is running at. High-Voltage programming does not work. The 10-pin cables are not connected correctly. See the Programming the AVR chapter for setup. 16 |
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Similar Description - STK504 |
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