mcf54455 Freescale Semiconductor, Inc, mcf54455 Datasheet - Page 35

• Manufacturer Part Number: mcf54455
• Description: 32-bit Microprocessor With Usb On-the-go, Ethernet, Pci, Ddr2/ddr Controller And Encryption
• Manufacturer: Freescale Semiconductor, Inc

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