Datasheet

DS10969 Rev 5 171/204
STM32L475xx Electrical characteristics
190
Figure 26. SPI timing diagram - slave mode and CPHA = 0
t
v(SO)
Data output valid time
Slave mode 2.7 < V
DD
< 3.6 V
Voltage Range 1
-12.519
ns
Slave mode 1.71 < V
DD
< 3.6 V
Voltage Range 1
-12.530
Slave mode 1.71 < V
DD
< 3.6 V
Voltage Range 2
-12.533
t
v(MO)
Master mode - 2.5 12.5
t
h(SO)
Data output hold time
Slave mode 9 - -
ns
t
h(MO)
Master mode 0 - -
1. Guaranteed by characterization results.
2. Maximum frequency in Slave transmitter mode is determined by the sum of t
v(SO)
and t
su(MI)
which has to fit into SCK low or
high phase preceding the SCK sampling edge. This value can be achieved when the SPI communicates with a master
having t
su(MI)
= 0 while Duty(SCK) = 50 %.
Table 85. SPI characteristics
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
MSv41658V1
NSS input
CPHA=0
CPOL=0
SCK input
CPHA=0
CPOL=1
MISO output
MOSI input
t
su(SI)
t
h(SI)
t
w(SCKL)
t
w(SCKH)
t
c(SCK)
t
r(SCK)
t
h(NSS)
t
dis(SO)
t
su(NSS)
t
a(SO)
t
v(SO)
Next bits IN
Last bit OUT
First bit IN
First bit OUT Next bits OUT
t
h(SO)
t
f(SCK)
Last bit IN
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