UPSD3354DV-40U6 Datasheet, PDF (31/272 Pages) STMicroelectronics – fast 8032 MCU with programmable logic

UPSD33xx
Memory organization
Standard 8032 MCU architecture cannot write to its own program memory space to prevent
accidental corruption of firmware. However, this becomes an obstacle in typical 8032
systems when a remote update to firmware in Flash memory is required using IAP. The PSD
module provides a solution for remote updates by allowing 8032 firmware to temporarily
“reclassify” Flash memory to reside in data space during a remote update, then returning
Flash memory back to program space when finished. See the VM register (Table 115 on
page 178) in the PSD module section of this document for more details.
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Doc ID 9685 Rev 7
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