AN886 Datasheet, PDF (4/9 Pages) STMicroelectronics – A customer who develops an MCU-based application needs various levels of flexibility in order

SELECTING BETWEEN ROM, FASTROM AND OTP FOR A MICROCONTROLLER
2 COMPARISON OF PRODUCTION FLOWS FOR ROM AND OTP
ROM and OTP devices have exactly the same functional and electrical behaviour in an appli-
cation because STMicroelectronics designs the two products with the same methodology. ROM
and OTP devices are qualified using the same procedures. They are tested using the same test
flows (see further) and with the same parameter limits. A good indication of device similarity
is EMC (electromagnetic noise immunity) measurements performed on both versions (ROM
and OTP) for the same MCU device.
ST6220 (ROM version)
ST62T20 (OTP version)
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