STM32F446ME datasheet(136/201 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F446xC/E

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DocID027107 Rev 5

SAI characteristics

Unless otherwise specified, the parameters given in Table 67 for SAI are derived from tests

performed under the ambient temperature, fPCLKx frequency and VDD 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 performed at CMOS levels: 0.5VDD

Refer to Section 6.3.17: I/O port characteristics for more details on the input/output alternate

function characteristics (SCK,SD,WS).

(3)

Table 67. SAI characteristics(1)

Symbol

Parameter

Conditions

Min

Max

Unit

fMCK

SAI Main clock output

256 x 8K

256 x Fs

MHz

fCK

SAI clock frequency(2)

Master data: 32 bits

128 x Fs(3)

MHz

Slave data: 32 bits

128 x Fs(3)

tv(FS)

FS valid time

Master mode

2.7 V ≤ VDD ≤3.6 V

-14

Master mode

1.71 V ≤ VDD ≤3.6 V

-17.5

th(FS)

FS hold time

Master mode

tsu(FS)

FS setup time

Slave mode

th(FS)

FS hold time

Slave mode

tsu(SD_A_MR)

Data input setup time

Master receiver

tsu(SD_B_SR)

Slave receiver

th(SD_A_MR)

Data input hold time

Master receiver

th(SD_B_SR)

Slave receiver

tv(SD_B_ST) Data output valid time

Slave trasmitter (after enable edge

2.7 V ≤ VDD ≤3.6 V

-9.5

Slave transmitter (after enable edge

1.71 V ≤ VDD ≤3.6 V

-16

th(SD_B_ST) Data output hold time

Slave transmitter (after enable edge

tv(SD_B_ST) Data output valid time

Master transmitter (after enable edge

2.7 V ≤ VDD ≤3.6 V

-15

Master transmitter (after enable edge

1.71 V ≤ VDD ≤3.6 V

-18

th(SD_B_ST) Data output hold time

Master transmitter (after enable edge

1. Guaranteed based on test during characterization.

2. 256xFs maximum corresponds to 45 MHz (APB2 xaximum frequency)

3. With Fs = 192 KHz

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