ST72321R/AR

` Three Flash programming modes:
Insertion in a programming tool. In this mode,all sectors including option bytes can be pro-grammed or erased.
ICP (In-Circuit Programming). In this mode, all sectors including option bytes can be pro-grammed or erased without removing the de-vice from the application board.
IAP (In-Application Programming) In this mode, all sectors except Sector 0, can be pro-grammed or erased without removing the de-vice from the application board and while the application is running.
` ICT (In-Circuit Testing) for downloading and executing user application test patterns in RAM n Read-out protection against piracy
` Register Access Security System (RASS) to prevent accidental programming or erasing

Stresses above those listed as "absolute maxi-mum ratings" may cause permanent damage to the device. This is a stress rating only and func-tional operation of the device under these condi-tions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

The ST72321R/AR dual voltage High Density Flash (HDFlash) is a non-volatile memory that can be electrically erased as a single block or by individu-al sectors and programmed on a Byte-by-Byte ba-sis using an external VPP supply.

The HDFlash devices can be programmed and erased off-board (plugged in a programming tool)or on-board using ICP (In-Circuit Programming) or IAP (In-Application Programming).

The ST72321R/AR array matrix organisation allows each sector to be erased and reprogrammed without affecting other sectors.