P5020NSE1VNB Freescale Semiconductor, P5020NSE1VNB Datasheet - Page 84

• Manufacturer Part Number: P5020NSE1VNB
• Description: Processors - Application Specialized Std Tmp Enc2000/1333
• Manufacturer: Freescale Semiconductor

Specifications of P5020NSE1VNB

• Rohs: yes

Electrical Characteristics
This figure shows the MII receive AC timing diagram.
2.12.2.3
This table presents the RGMII AC timing specifications.
84
For recommended operating conditions, see
Data to clock output skew (at transmitter)
Data to clock input skew (at receiver)
Clock period duration
Duty cycle for 10BASE-T and 100BASE-TX
Duty cycle for Gigabit
Rise time (20%–80%)
Fall time (20%–80%)
Note:
1. In general, the clock reference symbol representation for this section is based on the symbols RGT to represent RGMII
2. The t
3. For 10 and 100 Mbps, t
4. Duty cycle may be stretched/shrunk during speed changes or while transitioning to a received packet's clock domains as
5. The frequency of RX_CLK should not exceed frequency of GTX_CLK125 by more than 300ppm.
timing. Note that the notation for rise (R) and fall (F) times follows the clock symbol that is being represented. For symbols
representing skews, the subscript is skew (SK) followed by the clock that is being skewed (RGT).
of greater than 1.5 ns is added to the associated clock signal. Many PHY vendors already incorporate the necessary
delay inside their chip. If so, additional PCB delay is probably not needed.
transitioned between.
long as the minimum duty cycle is not violated and stretching occurs for no more than three t
SKRGT_RX
RGMII AC Timing Specifications
Parameter
RXD[3:0]
RX_CLK
RX_DV
RX_ER
specification implies that PC board design requires clocks to be routed such that an additional trace delay
P5020/P5010 QorIQ Integrated Processor Hardware Specifications, Rev. 0
RGT
scales to 400 ns ± 40 ns and 40 ns ± 4 ns, respectively.
Figure 18. MII Receive AC Timing Diagram
Table 38. RGMII AC Timing Specifications
t
t
MRXH
MRDVKH
Table
3.
t
MRX
t
t
t
t
RGTH
RGTH
Symbol
SKRGT_RX
SKRGT_TX
t
t
RGTR
t
RGTF
RGT
/t
/t
RGT
RGT
1
Valid Data
t
MRXF
–500
Min
1.0
7.2
40
45
—
—
t
MRDXKL
t
MRXR
Typ
8.0
—
50
50
—
—
0
Max
0.75
0.75
500
2.6
8.8
60
55
RGT
Freescale Semiconductor
of the lowest speed
Unit
ps
ns
ns
ns
ns
%
%
—
Note
3,
—
—
5
2
3
4