stm8af6166t STMicroelectronics, stm8af6166t Datasheet - Page 48

• Manufacturer Part Number: stm8af6166t
• Description: Automotive 8-bit Mcu, With Up To 128 Kbytes Flash, Eeprom, 10-bit Adc, Timers, Lin, Can, Usart, Spi, I2c, 3 V To 5.5 V
• Manufacturer: STMicroelectronics

Option bytes
10
Option bytes contain configurations for device hardware features as well as the memory protection of the
device. They are stored in a dedicated block of the memory. Except for the ROP (read-out protection)
byte, each option byte has to be stored twice, in a regular form (OPTx) and a complemented one
(NOPTx) for redundancy.
Option bytes can be modified in ICP mode (via SWIM) by accessing the EEPROM address shown in
Table 12: Option bytes
Option bytes can also be modified ‘on the fly’ by the application in IAP mode, except the ROP and UBC
options that can only be toggled in ICP mode (via SWIM).
Refer to the STM8 Flash programming manual (UM0316) and STM8 SWIM and debug manual (UM0320)
for information on SWIM programming procedures.
Table 12.
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4800h
4801h
4802h
4803h Alternate
4804h
4805h
4806h
4807h
4808h
4809h HSE clock
480Ah
480Bh
480Ch
480Dh
480Eh
Addr.
Read-out
protection
(ROP)
code(UBC)
function
remapping
(AFR)
Watchdog
option
Clock
option
startup
Reserved
Flash wait
states
User boot
Option
name
Option bytes
Option bytes
OPT0
OPT1
NOPT1
OPT2
NOPT2 NAFR7 NAFR6 NAFR5 NAFR4 NAFR3
OPT3
NOPT3
OPT4
NOPT4
OPT5
NOPT5
OPT6
NOPT6
OPT7
NOPT7
Option
byte
no.
below.
AFR7
7
AFR6
6
Reserved
Reserved
Reserved
Reserved
AFR5
5
Reserved
Reserved
AFR4
NHSECNT[7:0]
4
HSECNT[7:0]
Option bits
NUBC[7:0]
Reserved
Reserved
ROP[7:0]
UBC[7:0]
NEXT
AFR3
NLSI
_EN
_EN
EXT
CLK
CLK
LSI
3
NIWDG_
CKAWU
NCKAW
NAFR2
IWDG
AFR2
USEL
_HW
SEL
HW
2
STM8AF61xx, STM8AF51xx
WWDG
NAFR1
NWWD
G_HW
AFR1
_HW
NPR
PRS
SC1
C1
1
WWDG
NWWG
NAFR0
_HALT
_HALT
AFR0
Nwait
state
state
PRS
NPR
SC0
Wait
C0
0
Factory
default
setting
FFh
FFh
FFh
FFh
FFh
FFh
FFh
00h
00h
00h
00h
00h
00h
00h
00h