STM8AP5X6ATAY datasheet(51/100 Pages) STMICROELECTRONICS

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STM8AF61xx, STM8AF51xx

Option bytes

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Table 13.

Option byte description

Option byte no.

Description

OPT0

ROP[7:0]: Memory readout protection (ROP)

AAh: Enable readout protection (write access via SWIM protocol)

Note: Refer to the STM8A microcontroller family reference manual

(RM0009) section on Flash/EEPROM memory readout protection for

details.

OPT1

UBC[7:0]: User boot code area

00h: No UBC, no write-protection

01h: Page 0 to 1 defined as UBC, memory write-protected

02h: Page 0 to 3 defined as UBC, memory write-protected

03h to FFh: Pages 4 to 255 defined as UBC, memory write-protected

Note: Refer to the STM8A microcontroller family reference manual

(RM0009) section on Flash/EEPROM write protection for more details.

OPT2

AFR7: Alternate function remapping option 7

0: Port D4 alternate function = TIM2_CC1

1: Port D4 alternate function = BEEP

AFR6: Alternate function remapping option 6

0: Port B5 alternate function = AIN5, port B4 alternate function = AIN4

1: Port B5 alternate function = I2C_SDA, port B4 alternate function =

I2C_SCL.

AFR5: Alternate function remapping option 5

0: Port B3 alternate function = AIN3, port B2 alternate function = AIN2,

port B1 alternate function = AIN1, port B0 alternate function = AIN0.

1: Port B3 alternate function = TIM1_ETR, port B2 alternate function =

TIM1_NCC3, port B1 alternate function = TIM1_NCC2, port B0 alternate

function = TIM1_NCC1.

AFR4: Alternate function remapping option 4

0: Port D7 alternate function = TLI

1: Port D7 alternate function = TIM1_CC4

AFR3: Alternate function remapping option 3

0: Port D0 alternate function = TIM3_CC2

1: Port D0 alternate function = TIM1_BKIN

AFR2: Alternate function remapping option 2

0: Port D0 alternate function = TIM3_CC2

1: Port D0 alternate function = CLK_CCO

Note: AFR2 option has priority over AFR3 if both are activated

AFR1: Alternate function remapping option 1

0: Port A3 alternate function = TIM2_CC3, port D2 alternate function

TIM3_CC1.

1: Port A3 alternate function = TIM3_CC1, port D2 alternate function

TIM2_CC3.

AFR0: Alternate function remapping option 0

0: Port D3 alternate function = TIM2_CC2

1: Port D3 alternate function = ADC_ETR

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