The µPD78P322 is a version provided by replacing the µPD75322's internal mask ROM with one-time PROM or EPROM.
Because the one-time PROM version is programmable only once by users, it is ideally suited for small-scale production of many different products, and rapid development and time-to-market of application sets.
The EPROM version is reprogrammable, and suited for the evaluation of systems.

FEATURES
• µPD78322 compatible
   • For mass-production, the µPD78P322 can be replaced with the µPD78322 which incorporates mask ROM
• Internal PROM: 16,384 × 8 bits
   • Programmable once only (one-time PROM version without window)
   • Erasable with ultraviolet rays and electrically programmable (EPROM version with window)
• PROM programming characteristics: µPD27C256A compatible
• The µPD78P328 is a QTOPTM microcontroller