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STM32F427AI 数据表(PDF) 149 Page - STMicroelectronics

部件名 STM32F427AI
功能描述  32b Arm® Cortex®-M4 MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 com. interfaces, camera & LCD-TFT
PDF  240 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM32F427AI 数据表(HTML) 149 Page - STMicroelectronics

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DS9405 Rev 12
149/240
STM32F427xx STM32F429xx
Electrical characteristics
197
SAI characteristics
Unless otherwise specified, the parameters given in Table 65 for SAI are derived from tests
performed under the ambient temperature, fPCLKx frequency, and VDD supply voltage
conditions summarized in Table 17, 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).
Table 65. SAI characteristics(1)
Symbol
Parameter
Conditions
Min
Max
Unit
fMCKL
SAI Main clock output
-
256 x 8K
256xFs(2)
MHz
FSCK
SAI clock frequency
Master data: 32 bits
-
64xFs
MHz
Slave data: 32 bits
-
64xFs
DSCK
SAI clock frequency duty
cycle
Slave receiver
30
70
%
tv(FS)
FS valid time
Master mode
8
22
ns
tsu(FS)
FS setup time
Slave mode
2
-
th(FS)
FS hold time
Master mode
8
-
Slave mode
0
-
tsu(SD_MR)
Data input setup time
Master receiver
5
-
tsu(SD_SR)
Slave receiver
3
-
th(SD_MR)
Data input hold time
Master receiver
0
-
th(SD_SR)
Slave receiver
0
-
tv(SD_ST)
th(SD_ST)
Data output valid time
Slave transmitter (after enable
edge)
-22
tv(SD_MT)
Master transmitter (after enable
edge)
-20
th(SD_MT)
Data output hold time
Master transmitter (after enable
edge)
8-
1. Evaluated by characterization.
2. 256xFs maximum corresponds to 45 MHz (APB2 maximum frequency)



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