Datasheet

Padding value for unused program memory (check only one option)
Fixed value[ ]0xFF
TRAP instruction opcode[ ]0x83
Illegal opcode (causes a reset when executed)[ ]0x75
OPT0 memory readout protection (check only one option)
[ ] Disable or [ ] Enable
OPT1 user boot code area (UBC)
0x(_ _) fill in the hexadecimal value, refering to the datasheet and the binary format below.
[ ] 0: Reset
UBC, bit0
[ ] 1: Set
[ ] 0: Reset
UBC bit1
[ ] 1: Set
[ ] 0: Reset
UBC bit2
[ ] 1: Set
[ ] 0: Reset
UBC bit3
[ ] 1: Set
[ ] 0: Reset
UBC bit4
[ ] 1: Set
[ ] 0: Reset
UBC bit5
[ ] 1: Set
[ ] 0: Reset
UBC bit6
[ ] 1: Set
[ ] 0: Reset
UBC bit7
[ ] 1: Set
Note: If the UBC area is not used, please select all bits at reset states.
OPT2 alternate function remapping for STM8S903K3
Do not use more than one remapping option in the same port.
DocID15590 Rev 8106/116
STM8S903K3 STM8S903F3Ordering information