STM8L101 STMICROELECTRONICS [STMicroelectronics], STM8L101 Datasheet - Page 34

• Manufacturer Part Number: STM8L101
• Description: 8-bit ultralow power microcontroller with up to 8 Kbytes Flash multifunction timers, comparators, USART, SPI, I2C
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Option bytes
7
Table 10.
34/81
0x4800
0x4807
0x4802
0x4803
0x4808
Addr.
Boot code size)
Option name
Independent
DATASIZE
UBC (User
protection
watchdog
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
Refer to the STM8L Flash programming manual (PM0054) and STM8 SWIM and Debug
Manual (UM0320) for information on SWIM programming procedures.
Option bytes
Read-out
Table 11.
(ROP)
option
-
OPT1
OPT2
Option
Option byte description
OPT1
OPT2
OPT3
OPT4
Table 10
byte
[1:0]
No.
-
ROP[7:0] Memory readout protection (ROP)
UBC[7:0] Size of the user boot code area
Refer to
(RM0013) for more details.
0xAA: Enable readout protection (write access via SWIM protocol)
Refer to
(RM0013) for details.
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
for details on option byte addresses.
7
User boot area (UBC)
Read-out protection
6
Doc ID 15275 Rev 11
5
Must be programmed to 0x00
Reserved
4
DATASIZE[7:0]
Option bits
section in the STM8L reference manual
section in the STM8L reference manual
ROP[7:0]
UBC[7:0]
3
2
_HALT
IWDG
1
IWDG
_HW
0
STM8L101xx
Factory
default
setting
0x00
0x00
0x00
0x00
0x00