SPEAR320 datasheet(60/73 Pages) STMICROELECTRONICS

No de pièce	SPEAR320

Description	Embedded MPU with ARM926 core, optimized for factory automation and consumer applications

PDF	73 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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60 / 73 page

Timing requirements

SPEAr320

60/73

Doc ID 16755 Rev 5

7.9

MII Ethernet MAC 10/100 Mbps timing characteristics

The characterization timing is given for an output load of 5 pF on the MII TX clock and 10 pF

on the other pads.

7.9.1

MII transmit timing specifications

Figure 19.

MII TX waveforms

Note:

To calculate the tSETUP value for the PHY you have to consider the next tCLK rising edge, so

you have to apply the following formula: tSETUP = tCLK - tmax

7.9.2

MII receive timing specifications

Figure 20.

MII RX waveforms

Table 40.

MII TX timings

Symbol

Description

Min

Max

Unit

tCK

MII_TXCLK clock period

MII_TXCLK to MII output data delay

-1

8.9

MII_TXCLK

MII_TXD0-MII_TXD3,

MII_TXEN, MII_TXER

tck

Table 41.

MII RX timings

Symbol

Description

Min

Max

Unit

tCK

MII_TXCLK clock period

Setup time requirement for MII receive data

1.6

Hold time requirement for MII receive data

0.7

MII_RXCLK

MII_RXD0-MII_RXD3

MII_RXER, MII_RXDV

tCK

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