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STM32H757AI データシート(PDF) 227 Page - STMicroelectronics

部品番号 STM32H757AI
部品情報  Dual 32-bit Arm® Cortex®-M7 up to 480MHz and -M4 MCUs, 2MB Flash, 1MB RAM, 46 com. and analog interfaces, SMPS, DSI, crypto
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
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STM32H757AI データシート(HTML) 227 Page - STMicroelectronics

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DS12931 Rev 1
227/251
STM32H757xI
Electrical characteristics
230
Ethernet interface characteristics
Unless otherwise specified, the parameters given in Table 127, Table 128 and Table 129 for
SMI, RMII and MII are derived from tests performed under the ambient temperature,
frcc_c_ck frequency and VDD supply voltage conditions summarized in Table 23: General
operating conditions, with the following configuration:
•
Output speed is set to OSPEEDRy[1:0] = 10
•
Capacitive load CL=20 pF
•
Measurement points are done at CMOS levels: 0.5VDD
•
IO Compensation cell activated.
•
HSLV activated when VDD ≤ 2.7 V
•
VOS level set to VOS1
Refer to Section 6.3.18: I/O port characteristics for more details on the input/output
characteristics:
Figure 67. Ethernet SMI timing diagram
Table 127. Dynamics characteristics: Ethernet MAC signals for SMI (1)
1. Guaranteed by characterization results.
Symbol
Parameter
Min
Typ
Max
Unit
tMDC
MDC cycle time( 2.5 MHz)
400
400
403
ns
Td(MDIO)
Write data valid time
0.5
1.5
4
tsu(MDIO)
Read data setup time
12.5
-
-
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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