Atmel ATEVK525 Guía de usuario descargar pdf (Pagina 21)

ATEVK525 Mass Storage Board for AVR 4-21

7740B–AVR–03/08

Section 4

Troubleshooting Guide

Please refer to this guide before sending a request to AVR Technical Support. Main

problems should be solved here. This guide assumes that the board driver file provided

by Atmel is used.

Figure 4-1 . Troubleshooting Guide

Problem

Reason or

Condition

Problem / Solution

ATEVK525 does not

work

Bad power supply

Check the power supply source level

(3.3V) on VCC testpoint.

Board not correctly

mounted

Check that the board has been mounted

in the correct sense.

If the board is over the STK525, check

that the ZIF socket is not perturbed by it.

Same thing for the JTAG plug if used.

Protection circuit

problem

If the PWR_FAIL LED is lighting ON

whereas the voltage you measure on

VCC is correct, bypass the protection

circuitry (solder SP1).

NAND Flash device

(onboard chip only) does

not work

Additional module is

mounted.

The onboard memory chip cannot be

accessed while the optional NAND Flash

module is mounted since two memories

will share their chip select signal.

Chip select resistor

not mounted

Check that the R10 resistor is correctly

mounted, else the chip will never be

selected.

NAND Flash device

(additional module) does

not work

Chip select resistor

still mounted

Check that the R10 resistor is not

mounted (else both onboard chip and

module chip are selected at the same

time)

Module not correctly

mounted

Check if the module is correctly mounted.

Use preferentially a socket.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 29 30

Comentarios a estos manuales

Sin comentarios

Atmel ATEVK525 Guía de usuario Pagina 21

Comentarios a estos manuales

Relacionado con productos y manuales para No Atmel ATEVK525