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STM32F427AI 데이터시트(PDF) 155 Page - STMicroelectronics

부품명 STM32F427AI
상세설명  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
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제조업체  STMICROELECTRONICS [STMicroelectronics]
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STM32F427AI 데이터시트(HTML) 155 Page - STMicroelectronics

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DS9405 Rev 12
155/240
STM32F427xx STM32F429xx
Electrical characteristics
197
Ethernet characteristics
Unless otherwise specified, the parameters given in Table 72, Table 73 and Table 74 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 72 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 72. Dynamics characteristics: Ethernet MAC signals for SMI(1)
1. Evaluated by characterization.
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
-
-
MS31384V1
ETH_MDC
ETH_MDIO(O)
ETH_MDIO(I)
tMDC
td(MDIO)
tsu(MDIO)
th(MDIO)



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