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STM8L001J3 Datasheet(PDF) 28 Page - STMicroelectronics

Part # STM8L001J3
Description  8-bit ultra-low-power microcontroller with up to 8-Kbyte Flash memory, multifunction timers, comparators, UART, SPI, I2C
PDF  58 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM8L001J3 Datasheet(HTML) 28 Page - STMicroelectronics

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Option bytes
STM8L001J3
28/58
DS12153 Rev 4
7
Option bytes
Option bytes contain configurations for device hardware features as well as the memory
protection of the device. They are stored in a dedicated row of the memory.
All option bytes can be modified only in ICP mode (with SWIM) by accessing the EEPROM
address. See Table 9 for details on option byte addresses.
Refer to the How to program STM8L and STM8AL Flash program memory and data
EEPROM programming manual (PM0054) and the STM8 SWIM communication protocol
and debug module user manual (UM0470) for information on SWIM programming
procedures.
Table 9. Option bytes
Addr.
Option name
Option
byte
No.
Option bits
Factory
default
setting
76
54
3
2
1
0
0x4800
Read-out
protection
(ROP)
OPT1
ROP[7:0]
0x00
0x4807
-
-
Reserved
0x00
0x4802
UBC (User
Boot code size)
OPT2
UBC[7:0]
0x00
0x4803
DATASIZE
OPT3
DATASIZE[7:0]
0x00
0x4808
Independent
watchdog
option
OPT4
[1:0]
Reserved
IWDG
_HALT
IWDG
_HW
0x00
Table 10. Option byte description
OPT1
ROP[7:0] Memory readout protection (ROP)
0xAA: Enable readout protection (write access via SWIM protocol)
Refer to Read-out protection section in the STM8L001xx, STM8L101xx
microcontroller family reference manual (RM0013) for details.
OPT2
UBC[7:0] Size of the user boot code area
0x00: no UBC
0x01-0x02: UBC contains only the interrupt vectors.
0x03: Page 0 and 1 reserved for the interrupt vectors. Page 2 is available to
store user boot code. Memory is write protected
...
0x7F - Page 0 to 126 reserved for UBC, memory is write protected
Refer to User boot area (UBC) section in the STM8L001xx, STM8L101xx
microcontroller family reference manual (RM0013) for more details.
UBC[7] is forced to 0 internally by HW.



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