MSC7119 Freescale Semiconductor / Motorola, MSC7119 Datasheet - Page 30

• Manufacturer Part Number: MSC7119
• Description: Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC
• Manufacturer: Freescale Semiconductor / Motorola

Electrical Characteristics
2.5.6.2
2.5.6.3
30
No.
800
801
802
805
806
No.
807
Transmit clock period:
• MII: TXCLK
• RMII: REFCLK
Transmit clock pulse width high—as a percent of clock period
• MII: RXCLK
• RMII: REFCLK
Transmit clock pulse width low—as a percent of clock period:
• MII: RXCLK
• RMII: REFCLK
Transmit clock to TXDn, TX_EN, TX_ER invalid
Transmit clock to TXDn, TX_EN, TX_ER valid
• MII: CRS and COL minimum pulse width (1.5 × TXCLK period)
• RMII: CRS_DV minimum pulse width (1.5 x REFCLK period)
Transmit Signal Timing
Asynchronous Input Signal Timing
Transmit
CRS_DV
TX_EN
TX_ER
TXDn
clock
CRS
COL
MSC7119 10/100 Mbps Ethernet MAC Data Sheet, Rev. 6
Figure 12. Asynchronous Input Signal Timing
Table 23. Asynchronous Input Signal Timing
Figure 11. Ethernet Receive Signal Timing
Table 22. Transmit Signal Timing
Characteristics
Characteristics
805
806
801
800
Valid
807
802
Freescale Semiconductor
Min
Min
40
20
35
14
35
14
60
30
—
7
7
4
Max
Max
—
—
65
—
—
65
—
—
—
14
—
—
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
%