STM8AF6268TCX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM8AF6268TCX

Automotive 8-bit MCU, with up to32 Kbytes Flash, data EEPROM, 10-bit ADC, timers, LIN, SPI, I2C, 3 to 5.5V

STMicroelectronics 

STM8AF61xx, STM8AF62xx

Option bytes

Table 18. Option byte description (continued)

Option byte no.

Description

OPT12

TMU_KEY 5 [7:0]: Temporary unprotection key 4

Temporary unprotection key: Must be different from 0x00 or 0xFF

OPT13

OPT14

TMU_KEY 6 [7:0]: Temporary unprotection key 5

Temporary unprotection key: Must be different from 0x00 or 0xFF

TMU_KEY 7 [7:0]: Temporary unprotection key 6

Temporary unprotection key: Must be different from 0x00 or 0xFF

OPT15

TMU_KEY 8 [7:0]: Temporary unprotection key 7

Temporary unprotection key: Must be different from 0x00 or 0xFF

OPT16

TMU_MAXATT [7:0]: TMU access failure counter

TMU_MAXATT can be initialized with the desired value only if TMU is

disabled (TMU[3:0]=0101 in OPT6 option byte).

When TMU is enabled, any attempt to temporary remove the readout

protection by using wrong key values increments the counter.

When the option byte value reaches 0x08, the Flash memory and data

EEPROM are erased.

OPT17

BL [7:0]: Bootloader enable

If this option byte is set to 0x55 (complementary value 0xAA) the

bootloader program is activated also in case of a programmed code

memory

(for more details, see the bootloader user manual, UM0560).

Doc ID 14952 Rev 6

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