STM32F756VG datasheet(167/228 Pages) STMICROELECTRONICS

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STM32F756xx

Electrical characteristics

196

Ethernet characteristics

Unless otherwise specified, the parameters given in Table 85, Table 86 and Table 87 for

SMI, RMII and MII are derived from tests performed under the ambient temperature, fHCLK

frequency summarized in Table 17 and VDD supply voltage conditions summarized in

Table 85, 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 5.3.17: I/O port characteristics for more details on the input/output

characteristics.

Table 85 gives the list of Ethernet MAC signals for the SMI (station management interface)

and Figure 55 shows the corresponding timing diagram.

Figure 55. Ethernet SMI timing diagram

Table 84. Dynamic characteristics: USB ULPI(1)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

tSC

Control in (ULPI_DIR, ULPI_NXT) setup time

tHC

Control in (ULPI_DIR, ULPI_NXT) hold time

tSD

Data in setup time

1.5

tHD

Data in hold time

0.5

tDC/tDD Data/control output delay

2.7 V < VDD < 3.6 V,

CL = 20 pF and

OSPEEDRy[1:0] = 11

-5.5

5.5

11.5

1.7 V < VDD < 3.6 V,

CL = 15 pF and

OSPEEDRy[1:0] = 11

1. Guaranteed by characterization results.

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