STLUX285A datasheet(23/126 Pages) STMICROELECTRONICS

Teilenummer	STLUX285A

Bauteilbeschribung	Digital controllers for lighting and power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL, DALI

PDF	126 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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STLUX

Product overview

126

5.4.1

Architecture

Figure 6. Flash and E2PROM internal memory organizations



The memory is organized in blocks of 128 bytes each



Read granularity: 1 word = 4 bytes



Write/erase granularity: 1 word (4 bytes) or 1 block (128 bytes) in parallel



Writing, erasing, word and block management is handled automatically by the memory

interface.

5.4.2

Write protection (WP)

Write protection in application mode is intended to avoid unintentional overwriting of the

memory. The write protection can be removed temporarily by executing a specific sequence

in the user software.

5.4.3

Protection of user boot code (UBC)

In all STLUX devices a memory area of 32 Kbyte can be protected from overwriting at

a user option level. In addition to the standard write protection, the UBC protection can be

modified by the embedded program or via a debug interface when the ROP protection is

enabled.

The UBC memory area contains the reset and interrupt vectors and its size can be adjusted

in increments of 512 bytes by programming the UBC and nUBC option bytes.

Note:

If users choose to update the boot code in the application programming (IAP), this has to be

protected so to prevent unwanted modification.

STLUX285A Datenblatt(PDF) 23 Page - STMicroelectronics