MSC8144 Freescale Semiconductor, MSC8144 Datasheet - Page 56

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

Figure 27 provides the AC test load.
Figure 28 shows the MII receive AC timing diagram.
2.7.10.4
Table 45 provides the RMII transmit and receive AC timing specifications.
56
RXD[3:0], RX_DV, RX_ER setup time to RX_CLK
RXD[3:0], RX_DV, RX_ER hold time to RX_CLK
RX_CLK clock rise
RX_CLK clock fall time
Notes:
REF_CLK duty cycle
REF_CLK to RMII data TXD[1–0], TX_EN delay
RXD[1–0], CRS_DV, RX_ER setup time to REF_CLK
RXD[1–0], CRS_DV, RX_ER hold time to REF_CLK
REF_CLK data clock rise
REF_CLK data clock fall
Typical REF_CLK clock period (t
Notes:
1.
2.
1.
2.
Typical RX_CLK period (t
Program GCR4 as 0x00030CC3.
Typical REF_CLK clock period (t
Program GCR4 as 0x00001405
RMII Transmit and Receive AC Timing Specifications
RXD[3:0]
RX_CLK
RX_DV
RX_ER
Table 45. RMII Transmit and Receive AC Timing Specifications
Output
Table 44. MII Receive AC Timing Specifications (continued)
MSC8144 Quad Core Digital Signal Processor Data Sheet, Rev. 1
RMX
Parameter/Condition
Parameter/Condition
) is 20 ns
MRX
t
t
MRXH
MRDVKH
) for 10 Mbps is 400 ns and for 100 Mbps is 40 ns.
Figure 28. MII Receive AC Timing
RMX
t
MRX
) is 20 ns
Figure 27. AC Test Load
Z
0
= 50 Ω
Valid Data
t
MRXF
t
R
MRDXKH
t
L
MRXR
= 50 Ω
t
Symbol
RMXH/
Symbol
t
t
t
RMRDVKH
RMRDXKH
t
t
RMTKHDX
MRDVKH
MRDXKH
t
t
t
t
RMXR
MRXR
RMXF
MRXF
t
RMX
V
DD
1
1
/2
10.0
Min
Min
4.0
2.0
1.0
1.0
1.0
1.0
35
Freescale Semiconductor
2
2
Max
Max
4.0
4.0
4.0
4.0
65
10
—
—
—
—
Unit
Unit
ns
ns
ns
ns
ns
%
ns
ns
ns
ns