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STM32H747AI Scheda tecnica(PDF) 228 Page - STMicroelectronics

Il numero della parte STM32H747AI
Spiegazioni elettronici  Dual 32-bit Arm® Cortex®-M7 up to 480MHz and -M4 MCUs, up to 2MB Flash, 1MB RAM, 46 com. and analog interfaces, SMPS, DSI
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STM32H747AI Scheda tecnica(HTML) 228 Page - STMicroelectronics

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Electrical characteristics
STM32H747xI/G
218/242
DS12930 Rev 1
Ethernet interface characteristics
Unless otherwise specified, the parameters given in Table 126, Table 127 and Table 128 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 22: 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 126. 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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