参数资料
型号: KMPC8545EHXANG
厂商: Freescale Semiconductor
文件页数: 83/151页
文件大小: 0K
描述: IC MPU PWRQUICC III 783-FCCBGA
标准包装: 2
系列: MPC85xx
处理器类型: 32-位 MPC85xx PowerQUICC III
速度: 80GHz
电压: 1.1V
安装类型: 表面贴装
封装/外壳: 783-BBGA,FCBGA
供应商设备封装: 783-FCPBGA(29x29)
包装: 托盘
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9
Freescale Semiconductor
37
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
This table 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 requires clocks to be routed such that an additional trace delay of greater than 1.5 ns is
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). See “eTSEC 10” in the device errata document.
tTRRX
tTRRH
tTRRF
tTRRR
RX_CLK
RCG[9:0]
Valid Data
tTRRDXKH
tTRRDVKH
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