Datasheet
Electrical characteristics STM32L431xx
164/200 DocID028800 Rev 1
SAI characteristics
Unless otherwise specified, the parameters given in Table 85 for SAI are derived
from tests performed under the ambient temperature, f
PCLKx
frequency and V
DD
supply voltage conditions summarized in
Table 21: General operating conditions, with
the following configuration:
• Output speed is set to OSPEEDRy[1:0] = 10
• Capacitive load C = 30 pF
• Measurement points are done at CMOS levels: 0.5 V
DD
Refer to Section 6.3.14: I/O port characteristics for more details on the input/output
alternate function characteristics (CK,SD,FS).
Table 85. SAI characteristics
(1)
Symbol Parameter Conditions Min Max Unit
f
MCLK
SAI Main clock output - - 50 MHz
f
CK
SAI clock frequency
(2)
Master transmitter
2.7 V
DD
3.6
Voltage Range 1
-18.5
MHz
Master transmitter
1.71 V
DD
3.6
Voltage Range 1
-12.5
Master receiver
Voltage Range 1
-25
Slave transmitter
2.7 V
DD
3.6
Voltage Range 1
-22.5
Slave transmitter
1.71 V
DD
3.6
Voltage Range 1
-14.5
Slave receiver
Voltage Range 1
-25
Voltage Range 2 - 12.5
t
v(FS)
FS valid time
Master mode
2.7 V
DD
3.6
-22
ns
Master mode
1.71 V
DD
3.6
-40
t
h(FS)
FS hold time Master mode 10 - ns
t
su(FS)
FS setup time Slave mode 1 - ns
t
h(FS)
FS hold time Slave mode 2 - ns
t
su(SD_A_MR)
Data input setup time
Master receiver 2 -
ns
t
su(SD_B_SR)
Slave receiver 1.5 -
t
h(SD_A_MR)
Data input hold time
Master receiver 5 -
ns
t
h(SD_B_SR)
Slave receiver 2.5 -
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