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STM32F427AI bảng dữ liệu(PDF) 151 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  ARM Cortex-M4 32b MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 comm. interfaces, camera & LCD-TFT
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STM32F427AI bảng dữ liệu(HTML) 151 Page - STMicroelectronics

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STM32F427xx STM32F429xx
Electrical characteristics
192
Ethernet characteristics
Unless otherwise specified, the parameters given in Table 71, Table 72 and Table 73 for
SMI, RMII and MII are derived from tests performed under the ambient temperature, fHCLK
frequency summarized in Table 17 with the following configuration:
•
Output speed is set to OSPEEDRy[1:0] = 10
•
Capacitive load C = 30 pF for 2.7 V < VDD < 3.6 V
•
Capacitive load C = 20 pF for 1.71 V < VDD < 3.6 V
•
Measurement points are done at CMOS levels: 0.5VDD.
Refer to Section 6.3.17: I/O port characteristics for more details on the input/output
characteristics.
Table 71 gives the list of Ethernet MAC signals for the SMI (station management interface)
and Figure 47 shows the corresponding timing diagram.
Figure 47. Ethernet SMI timing diagram
Table 71. Dynamics characteristics: Ethernet MAC signals for SMI(1)
1. Guaranteed by characterization results.
Symbol
Parameter
Min
Typ
Max
Unit
tMDC
MDC cycle time(2.38 MHz)
411
420
425
ns
Td(MDIO) Write data valid time
6
10
13
tsu(MDIO) Read data setup time
12
-
-
th(MDIO)
Read data hold time
0
-
-



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