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When upgrading from MCS® 51 microcontroller to an MCS® 251 microcontroller – is it drop-in compatible?

April 26, 2017compatible drop-in microcontroller upgrading

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When upgrading from MCS® 51 microcontroller to an MCS® 251 microcontroller – is it drop-in compatible?

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The MCS 251 is drop-in compatible with the MCS 51 microcontroller, but there are some modifications that need to be considered. Please refer to Application Note AP-710 – Migrating from the MCS 51 Microcontroller to the MCS 251 Microcontroller (8xC251SB). Please note that this document refers to the A-stepping. You must configure the MCS 251 in binary and non-page mode to be compatible with the MCS 51 codes.