Electrical Characteristics
E4
E1
E3
E2
RXCLK (Input)
RXD[n:0]
RXDV,
Valid Data
RXER
Figure 7. MII Receive Signal Timing Diagram
2.10.2 Transmit Signal Timing Specifications
Table 19. Transmit Signal Timing
MII Mode
Num
Characteristic
Unit
Min
Max
—
E5
E6
E7
E8
TXCLK frequency
—
5
25
—
MHz
ns
TXCLK to TXD[n:0], TXEN, TXER invalid1
TXCLK to TXD[n:0], TXEN, TXER valid1
TXCLK pulse width high
—
25
ns
35%
35%
65%
65%
tTXCLK
tTXCLK
TXCLK pulse width low
1
In MII mode, n = 3
E8
TXCLK (Input)
E7
E5
E6
TXD[n:0]
TXEN,
TXER
Valid Data
Figure 8. MII Transmit Signal Timing Diagram
2.10.3 Asynchronous Input Signal Timing Specifications
Table 20. MII Transmit Signal Timing
Num
Characteristic
CRS, COL minimum pulse width
Min
Max
Unit
E9
1.5
—
TXCLK period
CRS, COL
E9
Figure 9. MII Async Inputs Timing Diagram
MCF52259 ColdFire Microcontroller, Rev. 0
38
Freescale Semiconductor
FREESCALE [ Freescale ]
