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STM32H7 bảng dữ liệu(PDF) 203 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  32-bit Arm® Cortex®-M7 480MHz MCUs, up to 2MB flash, up to 1MB RAM, 46 com. and analog interfaces
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DS12110 Rev 10
203/357
STM32H742xI/G STM32H743xI/G
Electrical characteristics (rev Y)
320
Figure 60. ULPI timing diagram
Ethernet characteristics
Unless otherwise specified, the parameters given in Table 114, Table 115 and Table 116 for
SMI, RMII and MII are derived from tests performed under the ambient temperature,
frcc_c_ck frequency summarized in Table 24: General operating conditions, with the following
configuration:
•
Output speed is set to OSPEEDRy[1:0] = 10
•
Capacitive load C = 20 pF
•
Measurement points are done at CMOS levels: 0.5VDD.
Refer to Section 6.3.15: I/O port characteristics for more details on the input/output
characteristics.
Table 114 gives the list of Ethernet MAC signals for the SMI and Figure 61 shows the
corresponding timing diagram.
Table 114. 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
1
1.5
3
tsu(MDIO) Read data setup time
8
-
-
th(MDIO)
Read data hold time
0
-
-
Clock
Control In
(ULPI_DIR,
ULPI_NXT)
data In
(8-bit)
Control out
(ULPI_STP)
data out
(8-bit)
tDD
tDC
tHD
tSD
tHC
tSC
ai17361c
tDC



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