Troubleshooting Guide - Atmel STK511 User Manual

Table 7-1. Troubleshooting Solutions
Problem
LED on Receiver Application Board
not active
LED(s) on Receiver Interface Board
not active
STK511 User Guide

Troubleshooting Guide

Reason
Power is not applied or is less than
5V
DATA Selector switch was not set to
the STK511 position when power
was applied
Receiver in permanent sleep mode
because Sleep mode of all 1s
selected in OPMODE register
Receiver Application Board rotated
180° when mounted on the
Receiver Interface Board
Power not applied
Corresponding DIP Switch bit(s)
not set
Bias resistor(s) damaged
Incorrect firmware loaded into the
Receiver Interface Board where I/O
port of the on-board microcontroller
programmed to logic high
Section 7
Solution
Verify that 5V is supplied to the
Receiver Application Board via on-
board pins or through the Receiver
Interface Board connection to the
®
STK 500 (VTG jumper).
Set DATA Selector switch to
STK511 and re-apply 5V supply
Select different polling rate and re-
program OPMODE register
Verify that Receiver Application
Board signal testpoints are placed
toward the DIP switches.
Verify that Power is supplied to the
Receiver Interface Board through
either the Receiver Application
Board or the STK500 Board (VTG
jumper).
Set the corresponding bit(s) to ON
on the DIP Switch for that register
Replace the corresponding bias
resistor(s) on the back of the
Receiver Interface Board with 1 kΩ
Reload the Receiver Interface
Board Firmware as described in
"Software Description"
section
on page 3-3
4842B–AVR–10/09
7-1