參數(shù)資料
型號(hào)： MPC8560VT667LC
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
封裝： 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, LEAD FREE, FLIP CHIP, PLASTIC, BGA-783
文件頁(yè)數(shù)： 34/108頁(yè)
文件大小： 1238K
代理商： MPC8560VT667LC
MPC8560 Integrated Processor Hardware Specifications, Rev. 4.2
Freescale Semiconductor
31
Ethernet: Three-Speed, MII Management
7.2.4 RGMII and RTBI AC Timing Specifications
Table 27 presents the RGMII and RTBI AC timing specifications.
Table 27. RGMII and RTBI AC Timing Specifications
At recommended operating conditions with LVDD of 2.5 V ± 5%.
Parameter/Condition
Symbol 1
Min
Typ
Max
Unit
Data to clock output skew (at transmitter)
tSKRGT
5
–500
0
500
ps
Data to clock input skew (at receiver) 2
tSKRGT
1.0
—
2.8
ns
Clock period3
tRGT
6
7.2
8.0
8.8
ns
Duty cycle for 1000Base-T 4
tRGTH/tRGT
6
45
50
55
%
Duty cycle for 10BASE-T and 100BASE-TX 3
tRGTH/tRGT
6
40
50
60
%
Rise and fall time
tRGTR, tRGTF
6,7
—
0.75
ns
Notes:
1.Note that, 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.The RGMII specification requires that PC board designer add 1.5 ns or greater in trace delay to the RX_CLK in order to
meet this specification. However, as stated above, this device will function with only 1.0 ns of delay.
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.Guaranteed by design.
7.Signal timings are measured at 0.5 V and 2.0 V voltage levels.
相關(guān)PDF資料
PDF描述
MPC8560CPX833LB 32-BIT, 883 MHz, RISC PROCESSOR, PBGA783
MPC8560PX667LB 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
MPC8560VT667LB 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
MPC8560CVT833JB 32-BIT, 883 MHz, RISC PROCESSOR, PBGA783
MPC8560CPX833JC 32-BIT, 883 MHz, RISC PROCESSOR, PBGA783
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