MSC8144 Freescale Semiconductor, MSC8144 Datasheet - Page 55

• Manufacturer Part Number: MSC8144
• Description: Quad Core Digital Signal Processor
• Manufacturer: Freescale Semiconductor

2.7.10.2
Table 43 provides the MII transmit AC timing specifications.
Figure 26 shows the MII transmit AC timing diagram.
2.7.10.3
Table 44 provides the MII receive AC timing specifications.
Freescale Semiconductor
TX_CLK duty cycle
TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay
TX_CLK data clock rise
TX_CLK data clock fall
Notes:
RX_CLK duty cycle
1.
2.
Typical TX_CLK period (t
Program GCR4 as 0x00030CC3.
MII Transmit AC Timing Specifications
MII Receive AC Timing Specifications
ETHMDIO
ETHMDIO
ETHMDC
(Output)
TXD[3:0]
TX_CLK
(Input)
TX_EN
TX_ER
MSC8144 Quad Core Digital Signal Processor Data Sheet, Rev. 1
Parameter/Condition
Parameter/Condition
Table 43. MII Transmit AC Timing Specifications
Table 44. MII Receive AC Timing Specifications
Figure 25. MII Management Interface Timing
MTX
t
t
MTXH
MDCH
) for 10 Mbps is 400 ns and for 100 Mbps is 40 ns.
Figure 26. MII Transmit AC Timing
t
t
MDC
MTX
t
MDDVKH
t
MDKHDX
t
MTKHDX
t
MTXF
t
MDDXKH
t
MTXR
t
MDHF
t
t
Symbol
MTXH/
Symbol
MRXH
t
MTKHDX
t
t
MTXR
MTXF
/t
t
MTX
MRX
1
1
t
MDCR
Min
Min
1.0
1.0
35
35
0
Max
Max
4.0
4.0
65
25
65
Unit
Unit
ns
ns
ns
%
%
55