ST7FOXU0 datasheet(111/123 Pages) STMICROELECTRONICS

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ST7FOXU0

Device configuration and ordering information

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13.1.2

ST7FOXU0 Option byte 0

OPT 7:4 = Reserved, must always be set

OPT 3:2 = SEC[1:0] Sector 0 size definition

These option bits indicate the size of sector 0 according to Table 61.

Bit 1 = FMP_R Read-Out Protection

Read-Out Protection, when selected provides a protection against program memory

content extraction and against write access to Flash memory. Erasing the option bytes

when the FMP_R option is selected will cause the whole memory to be erased first,

and the device can be reprogrammed. Refer to Section 4.5 on page 19 and the ST7

Flash Programming Reference Manual for more details.

0: Read-Out Protection off

1: Read-Out Protection on

Bit 0 = FMP_W Flash write protection

This option indicates if the Flash program memory is write protected.

0: Write protection off

1: Write protection on

Warning:

When the Flash write protection is selected, the program

memory (and the option bit itself) can never be erased or

programmed again.

Table 61.

Configuration of sector size

Sector 0 Size

SEC1

SEC0

0.5k

-1

Option byte 0

Option byte 1

Res Res Res Res

SEC

FMP

SEL1

SEL0

Res

LVD

WDG

HALT

Default value

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