The ST9291 is a ROM member of the ST9 family of microcontrollers, completely developed and pro
duced by SGS-THOMSON Microelectronics using a proprietary n-well HCMOS process.
The ROM parts are fully compatible with their EPROM and OTP (One-Time Programmable) ver
sions, which may be used for the prototyping and pre-production phases of development.
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