MSC7119VM1200 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MSC7119VM1200

Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC

Freescale Semiconductor 

Electrical Characteristics

2.5.6.2 Transmit Signal Timing

Table 22. Transmit Signal Timing

No.

Characteristics

800 Transmit clock period:

• MII: TXCLK

• RMII: REFCLK

801 Transmit clock pulse width high—as a percent of clock period

• MII: RXCLK

• RMII: REFCLK

802 Transmit clock pulse width low—as a percent of clock period:

• MII: RXCLK

• RMII: REFCLK

805 Transmit clock to TXDn, TX_EN, TX_ER invalid

806 Transmit clock to TXDn, TX_EN, TX_ER valid

800

801

802

Transmit

clock

TXDn

TX_EN

TX_ER

806

805

Valid

Figure 11. Ethernet Receive Signal Timing

2.5.6.3 Asynchronous Input Signal Timing

Table 23. Asynchronous Input Signal Timing

No.

Characteristics

807 • MII: CRS and COL minimum pulse width (1.5 × TXCLK period)

• RMII: CRS_DV minimum pulse width (1.5 x REFCLK period)

CRS

COL

CRS_DV

807

Figure 12. Asynchronous Input Signal Timing

Min Max Unit

40

—

ns

20

—

ns

35

65

%

14

—

ns

7

—

ns

35

65

%

14

—

ns

7

—

ns

4

—

ns

—

14

ns

Min Max Unit

60

—

ns

30

—

ns

MSC7119 Data Sheet, Rev. 8

30

Freescale Semiconductor

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