MCIMX515CJM6C Freescale, MCIMX515CJM6C Datasheet - Page 77

• Manufacturer Part Number: MCIMX515CJM6C
• Manufacturer: Freescale

Specifications of MCIMX515CJM6C

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

4.7.4.2
The MII transmit signal timing affects the FEC_TXD[3:0], FEC_TX_EN, FEC_TX_ER, and
FEC_TX_CLK signals. The transmitter functions correctly up to a FEC_TX_CLK maximum frequency
of 25 MHz + 1%. There is no minimum frequency requirement. In addition, the processor clock frequency
must exceed twice the FEC_TX_CLK frequency.
and
Freescale Semiconductor
1
.
FEC_TX_EN, FEC_TX_CLK, and FEC_TXD0 have the same timing in 10 Mbps 7-wire interface mode.
Num
M5
M6
M7
M8
Figure 43
FEC_TXD[3:0] (outputs)
FEC_RXD[3:0] (inputs)
FEC_RX_CLK (input)
FEC_TX_CLK (input)
FEC_TX_CLK to FEC_TXD[3:0], FEC_TX_EN, FEC_TX_ER invalid
FEC_TX_CLK to FEC_TXD[3:0], FEC_TX_EN, FEC_TX_ER valid
FEC_TX_CLK pulse width high
FEC_TX_CLK pulse width low
MII Transmit Signal Timing
shows MII transmit signal timing diagram for the values listed in
FEC_RX_ER
FEC_RX_DV
FEC_TX_EN
FEC_TX_ER
i.MX51 Applications Processors for Consumer and Industrial Products, Rev. 4
Figure 43. MII Transmit Signal Timing Diagram
Figure 42. MII Receive Signal Timing Diagram
Characteristic
Table 71. MII Transmit Signal Timing
M1
1
M5
M2
Table 71
M6
M3
M7
lists MII transmit channel timing parameters
35%
35%
Min
—
M4
5
M8
Max
65%
65%
Table
20
—
Electrical Characteristics
71.
FEC_TX_CLK period
FEC_TX_CLK period
Unit
ns
ns
77