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When running internal code, external memory fails.
- When the XA is powered up in
internal mode, the external bus control pins are defaulted to
quasi-bidirectional mode. This results in the control lines (RD-,
WRL- & WRH-) failing to drive external hardware properly. These
control line MUST be programmed to operate in Push-pull Mode via
the PnCFGA & PnCFGB registers. Please refer to the data sheet for
the XA on how to program these pins for push-pull operation.
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