Problem Interfacing Flash Memory via SPI

Discussion in 'Embedded Systems and Microcontrollers' started by Flow, Jul 17, 2010.

  1. Flow

    Thread Starter Member

    May 30, 2010
    Hey there,

    I'm having troubles interfacing an Atmega AT25DF321 to a MSP430.
    I have a dev board with the MSP430 and soldered up a board, see the attached schematic. There's like 5cm of wire between the boards.

    The output from the Flash, read by the MSP430 is constantly 0. If I omit the capacitors, I read the same value as I put out.

    What am I doing wrong here? Could it be that I damaged the MSP430 and/or the Flash by forgetting a Resistor to limit the current :rolleyes:?

    Thanks in advance!
  2. hgmjr

    Retired Moderator

    Jan 28, 2005
    The caps on the inputs to the U$2 seem a bit large. You could drop them to 1000 PF or eliminate them all together.