STM8AFSLASHP6348 datasheet(46/95 Pages) STMICROELECTRONICS

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Option bytes

STM8AF6366

46/95

DS12343 Rev 2

Table 16. Option byte description

Option byte no.

Description

OPT0

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

0xAA: Enable readout protection (write access via SWIM protocol)

Note: Refer to STM8S series and STM8AF series 8-bit microcontrollers

reference manual (RM0016) section on Flash/EEPROM memory

readout protection for details.

OPT1

UBC[5:0]: User boot code area

0x00: No UBC, no write-protection

0x01: Page 0 to 1 defined as UBC, memory write-protected

0x02: Page 0 to 3 defined as UBC, memory write-protected

0x03 to 0x3F: Pages 4 to 63 defined as UBC, memory write-protected

Note: Refer to STM8S series and STM8AF series 8-bit microcontrollers

reference manual (RM0016) section on Flash/EEPROM write protection

for more details.

OPT2

AFR7: Alternate function remapping option 7

0: Port D4 alternate function = TIM2_CH1

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_CH3N, port B1 alternate function = TIM1_CH2N, port B0 alternate

function = TIM1_CH1N.

AFR4: Alternate function remapping option 4

Reserved, bit must be kept at “0”

AFR3: Alternate function remapping option 3

0: Port D0 alternate function = TIM3_CH2

1: Port D0 alternate function = TIM1_BKIN

AFR2: Alternate function remapping option 2

0: Port D0 alternate function = TIM3_CH2

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_CH3, port D2 alternate function

TIM3_CH1.

1: Port A3 alternate function = TIM3_CH1, port D2 alternate function

TIM2_CH3.

AFR0: Alternate function remapping option 0

0: Port D3 alternate function = TIM2_CH2

1: Port D3 alternate function = ADC_ETR

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