Datasheet

DocID025936 Rev 8 103/143
STM32L052x6 STM32L052x8 Electrical characteristics
112
The analog spike filter is compliant with
I
2
C timings requirements only for the following
voltage ranges:
• Fast mode Plus: 2.7 V ≤
V
DD
≤ 3.6 V and voltage scaling Range 1
• Fast mode:
–2 V ≤ V
DD
≤ 3.6 V and voltage scaling Range 1 or Range 2.
–V
DD
< 2 V, voltage scaling Range 1 or Range 2, C
load
< 200 pF.
In other ranges, the analog filter should be disabled. The digital filter can be used instead.
Note: In Standard mode, no spike filter is required.
SPI characteristics
Unless otherwise specified, the parameters given in the following tables are derived from
tests performed under ambient temperature, f
PCLKx
frequency and V
DD
supply voltage
conditions summarized in Table 25.
Refer to Section 6.3.12: I/O current injection characteristics for more details on the
input/output alternate function characteristics (NSS, SCK, MOSI, MISO).
Table 72. I2C analog filter characteristics
(1)
1. Guaranteed by characterization results.
Symbol Parameter Conditions Min Max Unit
t
AF
Maximum pulse width of spikes that
are suppressed by the analog filter
Range 1
50
(2)
2. Spikes with widths below t
AF(min)
are filtered.
260
(3)
3. Spikes with widths above t
AF(max)
are not filtered
nsRange 2 -
Range 3 -
Table 73. SPI characteristics in voltage Range 1
(1)
Symbol Parameter Conditions Min Typ Max Unit
f
SCK
1/t
c(SCK)
SPI clock frequency
Master mode
--
16
MHz
Slave mode
receiver
16
Slave mode
Transmitter
1.71<V
DD
<3.6V
--12
(2)
Slave mode
Transmitter
2.7<V
DD
<3.6V
--16
(2)
Duty
(SCK)
Duty cycle of SPI clock
frequency
Slave mode 30 50 70 %
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.