Option bytes
STM8S207xx, STM8S208xx
Table 13. Option byte description
Option byte no.
Description
ROP[7:0] Memory readout protection (ROP)
0xAA: Enable readout protection (write access via SWIM protocol)
Note: Refer to the family reference manual (RM0016) section on
Flash/EEPROM memory readout protection for details.
OPT0
UBC[7:0] User boot code area
0x00: no UBC, no write-protection
0x01: Pages 0 to 1 defined as UBC, memory write-protected
0x02: Pages 0 to 3 defined as UBC, memory write-protected
0x03: Pages 0 to 4 defined as UBC, memory write-protected
...
OPT1
0xFE: Pages 0 to 255 defined as UBC, memory write-protected
0xFF: Reserved
Note: Refer to the family reference manual (RM0016) section on
Flash/EEPROM write protection for more details.
AFR7Alternate 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
0: Port D7 alternate function = TLI
1: Port D7 alternate function = TIM1_CH4
OPT2
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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Doc ID 14733 Rev 9
STMICROELECTRONICS [ ST ]
