STM8S003K3U6CTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM8S003K3U6CTR

Value line, 16-MHz STM8S 8-bit MCU, 8-Kbyte Flash memory, 128-byte data EEPROM, 10-bit ADC, 3 timers, UART, SPI, I²C

STMicroelectronics 

STM8S003F3 STM8S003K3

Option bytes

Table 13. Option byte description (continued)

Option byte no.

Description

OPT1

UBC[7:0] User boot code area

0x00: no UBC, no write-protection

0x01: Pages 0 defined as UBC, memory write-protected

0x02: Pages 0 to 1 defined as UBC, memory write-protected

Page 0 and page 1 contain the interrupt vectors.

...

0x7F: Pages 0 to 126 defined as UBC, memory write-protected

Other values: Pages 0 to 127 defined as UBC, memory-write protected.

Note: Refer to the family reference manual (RM0016) section on

Flash/EEPROM write protection for more details.

OPT2

AFR[7:0]

Refer to the following section for alternate function remapping descriptions

of bits [7:2] and [1:0] respectively.

HSITRIM: high-speed internal clock trimming register size

0: 3-bit trimming supported in CLK_HSITRIMR register

1: 4-bit trimming supported in CLK_HSITRIMR register

LSI_EN: Low speed internal clock enable

0: LSI clock is not available as CPU clock source

1: LSI clock is available as CPU clock source

OPT3

IWDG_HW: Independent watchdog

0: IWDG Independent watchdog activated by software

1: IWDG Independent watchdog activated by hardware

WWDG_HW: Window watchdog activation

0: WWDG window watchdog activated by software

1: WWDG window watchdog activated by hardware

WWDG_HALT: Window watchdog reset on halt

0: No reset generated on halt if WWDG active

1: Reset generated on halt if WWDG active

EXTCLK: External clock selection

0: External crystal connected to OSCIN/OSCOUT

1: External clock signal on OSCIN

OPT4

CKAWUSEL: Auto wakeup unit/clock

0: LSI clock source selected for AWU

1: HSE clock with prescaler selected as clock source for for AWU

PRSC[1:0] AWU clock prescaler

0x: 16 MHz to 128 kHz prescaler

10: 8 MHz to 128 kHz prescaler

11: 4 MHz to 128 kHz prescaler

OPT5

HSECNT[7:0]: HSE crystal oscillator stabilization time

This configures the stabilization time.

0x00: 2048 HSE cycles

0xB4: 128 HSE cycles

0xD2: 8 HSE cycles

0xE1: 0.5 HSE cycles

DS7147 Rev 10

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