參數(shù)資料
型號: MPC8308VMAFF
廠商: Freescale Semiconductor
文件頁數(shù): 36/83頁
文件大?。?/td> 0K
描述: IC PROCESSOR E300 473MAPBGA
標準包裝: 84
系列: MPC83xx
處理器類型: 32-位 MPC83xx PowerQUICC II Pro
速度: 333MHz
電壓: 1V
安裝類型: 表面貼裝
封裝/外殼: 473-LFBGA
供應(yīng)商設(shè)備封裝: 473-MAPBGA(19x19)
包裝: 托盤
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 3
Freescale Semiconductor
41
Enhanced Local Bus
NOTE
The reference impedance for return loss measurements is 50
to ground for
both the D+ and D- line (that is, as measured by a Vector Network Analyzer
with 50
probes—see Figure 29). Note that the series capacitors,
CPEACCTX, are optional for the return loss measurement.
Figure 28. Minimum Receiver Eye Timing and Voltage Compliance Specification
11.5.1
Compliance Test and Measurement Load
The AC timing and voltage parameters must be verified at the measurement point, as specified within
0.2 inches of the package pins, into a test/measurement load shown in Figure 29.
NOTE
The allowance of the measurement point to be within 0.2 inches of the
package pins is meant to acknowledge that package/board routing may
benefit from D+ and D– not being exactly matched in length at the package
pin boundary.
Figure 29. Compliance Test/Measurement Load
12 Enhanced Local Bus
This section describes the DC and AC electrical specifications for the enhanced local bus interface.
VRX-DIFFp-p-MIN > 175 mV
0.4 UI = TRX-EYE-MIN
VRX-DIFF = 0 mV
(D+ D– Crossing Point)
VRX-DIFF = 0 mV
(D+ D– Crossing Point)
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