參數(shù)資料
型號(hào): MPC8548EVTAUGB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 1333 MHz, MICROPROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, FLIP CHIP, LEAD FREE, PLASTIC, BGA-783
文件頁數(shù): 73/142頁
文件大小: 1504K
代理商: MPC8548EVTAUGB
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
36
Freescale Semiconductor
Enhanced Three-Speed Ethernet (eTSEC)
A timing diagram for TBI receive appears in Figure 16.
.
Figure 16. TBI Single-Clock Mode Receive AC Timing Diagram
8.2.6
RGMII and RTBI AC Timing Specifications
Table 33 presents the RGMII and RTBI AC timing specifications.
Table 33. RGMII and RTBI AC Timing Specifications
Parameter/Condition
Symbol1
Min
Typ
Max
Unit
Data to clock output skew (at transmitter)
tSKRGT
5
–5006
0
5006
ps
Data to clock input skew (at receiver) 2
tSKRGT
1.0
2.8
ns
Clock period 3
tRGT
5
7.2
8.0
8.8
ns
Duty cycle for 10BASE-T and 100BASE-TX3, 4
tRGTH/tRGT
5
45
50
55
%
Rise time (20%–80%)
tRGTR
5
0.75
ns
Fall time (20%–80%)
tRGTF
5
0.75
ns
Notes:
1. In general, the clock reference symbol representation for this section is based on the symbols RGT to represent RGMII and
RTBI timing. For example, the subscript of tRGT represents the TBI (T) receive (RX) clock. Note also 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).
2. This implies that PC board design will require clocks to be routed such that an additional trace delay of greater than 1.5 ns
will be added to the associated clock signal.
3. For 10 and 100 Mbps, tRGT scales to 400 ns ± 40 ns and 40 ns ± 4 ns, respectively.
4. Duty cycle may be stretched/shrunk during speed changes or while transitioning to a received packet's clock domains as long
as the minimum duty cycle is not violated and stretching occurs for no more than three tRGT of the lowest speed transitioned
between.
5. Guaranteed by characterization.
6. In rev 1.0 silicon, due to errata, tSKRGT is -650 ps (min) and 650 ps (max). Please refer to “eTSEC 10” in the device errata
document.
tTRRX
tTRRH
tTRRF
tTRRR
RX_CLK
RCG[9:0]
Valid Data
tTRRDXKH
tTRRDVKH
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