Datasheet

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STM32F446xC/E Electrical characteristics
175
I
2
S interface characteristics
Unless otherwise specified, the parameters given in Table 66 for the I
2
S interface are
derived from tests performed under the ambient temperature, f
PCLKx
frequency and V
DD
supply voltage conditions summarized in
Table 16, 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: 0.5V
DD
Refer to Section 6.3.17: I/O port characteristics for more details on the input/output alternate
function characteristics (CK, SD, WS).
t
w(CKH)
QSPI clock high and low -
(T
(CK)
/ 2) - 2 - T
(CK)
/ 2
ns
t
w(CKL)
T
(CK)
/ 2 - (T
(CK)
/ 2) +2
t
s(IN)
Data input setup time - 0 - -
t
h(IN)
Data input hold time - 5.5 - -
t
v(OUT)
Data output valid time
2.7V <VDD< 3.6V - 5.5 6.5
1.71V <VDD< 3.6V - 8 9.5
t
h(OUT)
Data output hold time - 3.5 - -
1. Guaranteed based on test during characterization.
Table 65. QSPI dynamic characteristics in DDR Mode
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
Table 66. I
2
S dynamic characteristics
(1)
Symbol Parameter Conditions Min Max Unit
f
MCK
I2S Main clock output - 256 x 8K 256 x Fs
(2)
MHz
f
CK
I2S clock frequency
Master data - 64 x Fs
MHz
Slave data - 64 x Fs
D
CK
I2S clock frequency duty cycle Slave receiver 30 70 %
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