MCF54455_0812 Datasheet, PDF (34/48 Pages) Freescale Semiconductor, Inc – MCF5445x ColdFire® Microprocessor Data Sheet

Electrical Characteristics
RXCLK (Input)
E4
E3
RXD[n:0]
RXDV,
RXER
E1
E2
Valid Data
Figure 19. MII Receive Signal Timing Diagram
5.13.2 Transmit Signal Timing Specifications
Table 21. Transmit Signal Timing
Num
Characteristic
— TXCLK frequency
E5 TXCLK to TXD[n:0], TXEN, TXER invalid¹
E6 TXCLK to TXD[n:0], TXEN, TXER valid¹
E7 TXCLK pulse width high
E8 TXCLK pulse width low
1 _{In MII mode, n = 3; In RMII mode, n = 1}
MII Mode
Min
Max
—
5
—
35%
35%
25
—
25
65%
65%
RMII Mode
Min
Max
—
5
—
35%
35%
50
—
14
65%
65%
Unit
MHz
ns
ns
t_TXCLK
t_TXCLK
TXCLK (Input)
E8
E7
TXD[n:0]
TXEN,
TXER
E6
E5
Valid Data
Figure 20. MII Transmit Signal Timing Diagram
5.13.3 Asynchronous Input Signal Timing Specifications
Table 22. MII Transmit Signal Timing
Num
Characteristic
Min
Max
E9 CRS, COL minimum pulse width
1.5
—
Unit
TXCLK period
MCF5445x ColdFire^® Microprocessor Data Sheet, Rev. 3
34
Freescale Semiconductor