STLUX385ATR datasheet(53/99 Pages) STMICROELECTRONICS

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STLUX385A

Option bytes

The user option byte is a memory E²PROM area allowing users to customize the IC device

major functionalities:

•

ROP: read-out protection control field

•

UBC: user boot code protection

•

PWM: configurable reset output value

•

WDG: internal watchdog HW configuration

•

AFR: alternate multifunction signals configuration

•

CKC: clock controller functionalities (PLL, HSE enable, AWU clock selection…)

•

HSE: clock stabilization counter

•

WAIT: Flash and E²PROM wait state access time has to be configured with value 0x00

•

BOOT: configurable internal boot sources

•

BL: boot-loader control sequences

Except the ROP byte all the other option bytes are stored twice in a regular (OPT) and

complemented format (NOPT) for redundancy. The option byte can be programmed in ICP

mode through the SWIM interface or in IAP mode by the application with the exception of

the ROP byte that can be only configured via SWIM interface.

Refer to the STM8 Flash programming manual (PM0047) for further information about Flash

programming.

Refer to STM8 SWIM communication protocol and debug module user manual (UM0470)

for information on SWIM programming procedures.

STLUX385ATR Datasheet(PDF) 53 Page - STMicroelectronics