ARM Technical Support Knowledge Articles

EXTERNAL FLASH / RAM DO NOT WORK PROPERLY

Applies to: MCBXC167 Evaluation Board

Answer


Information in this article applies to:


SYMPTOM

When trying to flash the External Flash (IC2), it fails and µVision reports verification errors.

The external RAM also does not seem to work in my application, nor when I try to use it to download my application there (with MON166 or ULINK).

CAUSE

Very early versions of the MCB-XC167 were missing a configuration resistor. The missing resistor R37 is a 10 kOhm pull-down resistor on P0.6 and sets the bus type (BTYP). If it is missing, the MCB-XC167 operates with an 8-bit demultiplexed bus instead of the 16-bit bus that is required.

RESOLUTION

Populate a 10 kOhm resistor for R37. You may also contact the Keil Support Team if you have difficulties.

MORE INFORMATION

SEE ALSO

Article last edited on: 2007-01-18 13:54:20

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