ST STM32L0x3 User Manual

Flash program memory and data EEPROM (FLASH) RM0367
114/1043 RM0367 Rev 7
3.7.7 Status register (FLASH_SR)
Address offset: 0x018
Reset value: 0x0000 000C
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
FWWER
NOTZERO
ERR
rc_w1 rc_w1
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Res. Res.
RDERR
Res.
OPTVERR
SIZERR
PGAERR
WRPERR
Res. Res. Res. Res.
READY
ENDHV
EOP
BSY
rc_w1 rc_w1 rc_w1 rc_w1 rc_w1 r r rc_w1 r
Bits 31:18 Reserved, must be kept at reset value
Bit 17 FWWERR
This bit is set by hardware when a write/erase operation is aborted to perform a fetch. This is
not a real error, but it is used to inform that the write/erase operation did not execute. To reset
this flag, write 1.
0: No write/erase operation aborted to perform a fetch.
1: A write/erase operation aborted to perform a fetch.
Bit 16 NOTZEROERR
This bit is set by hardware when a program in the Flash program or System Memory tries to
overwrite a not-zero area. In category 3 devices, this flag does not stop the program operation:
it is possible that the value found when reading back is not what the user wrote. To reset this
flag, write 1.
0: The write operation is done in an erased region or the memory interface can apply an
erase before a write.
1: The write operation is attempting to write to a not-erased region and the memory interface
cannot apply an erase before a write. Except for category 3 devices, the modify operation is
aborted. For category 3 devices a not-zero error does not abort the write/erase operation.
Bits 15:14 Reserved, must be kept at reset value
Bit 13 RDERR
This bit is set by hardware when the user tries to read an area protected by PcROP. It is
cleared by writing 1.
0: No read protection error happened.
1: One read protection error happened.
Bit 12 Reserved, must be kept at reset value
Bit 11 OPTVERR: Option valid error
This bit is set by hardware when, during an Option byte loading, there was a mismatch for one
or more configurations. It means that the configurations loaded may be different from what the
user wrote in the memory. It is cleared by writing 1.
If an error happens while loading the protections (WPRMOD, RDPROT, WRPROT), the source
code in the Flash program memory may not execute correctly.
0: No error happened during the Option bytes loading.
1: One or more errors happened during the Option bytes loading.

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English