The Configuration Problem Solver

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Address Pins don't start at 000000h.

To configure in the Master Parallel Mode the Mode Pins <M2:M1:M0> must be set to <100> for Parallel Up Mode, and <110> for Parallel Down Mode. In the Parallel Up Mode the Address lines start at <00000h> and count up. In the Parallel Down Mode the Address lines start at <1FFFFh> and count down.

Be certain that the PROM data was stored properly for the selected MODE.