Datasheet

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STM32L431xx Electrical characteristics
168
6.3.10 Flash memory characteristics
Table 52. Flash memory characteristics
(1)
1. Guaranteed by design.
Symbol Parameter Conditions Typ Max Unit
t
prog
64-bit programming time - 81.69 90.76 µs
t
prog_row
one row (32 double
word) programming time
normal programming 2.61 2.90
ms
fast programming 1.91 2.12
t
prog_page
one page (2 Kbyte)
programming time
normal programming 20.91 23.24
fast programming 15.29 16.98
t
ERASE
Page (2 KB) erase time - 22.02 24.47
t
prog_bank
one bank (512 Kbyte)
programming time
normal programming 5.35 5.95
s
fast programming 3.91 4.35
t
ME
Mass erase time
(one or two banks)
- 22.13 24.59 ms
I
DD
Average consumption
from V
DD
Write mode 3.4 -
mA
Erase mode 3.4 -
Maximum current (peak)
Write mode 7 (for 2 s) -
Erase mode 7 (for 41 s) -
Table 53. Flash memory endurance and data retention
Symbol Parameter Conditions Min
(1)
1. Guaranteed by characterization results.
Unit
N
END
Endurance T
A
= –40 to +105 °C 10 kcycles
t
RET
Data retention
1 kcycle
(2)
at T
A
= 85 °C
2. Cycling performed over the whole temperature range.
30
Years
1 kcycle
(2)
at T
A
= 105 °C 15
1 kcycle
(2)
at T
A
= 125 °C 7
10 kcycles
(2)
at T
A
= 55 °C 30
10 kcycles
(2)
at T
A
= 85 °C 15
10 kcycles
(2)
at T
A
= 105 °C 10
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