參數(shù)資料
型號: KMPC8314CVRAGDA
廠商: Freescale Semiconductor
文件頁數(shù): 51/101頁
文件大?。?/td> 0K
描述: IC MPU POWERQUICC II 620-PBGA
標(biāo)準(zhǔn)包裝: 2
系列: MPC83xx
處理器類型: 32-位 MPC83xx PowerQUICC II Pro
速度: 400MHz
電壓: 1V
安裝類型: 表面貼裝
封裝/外殼: 620-BBGA 裸露焊盤
供應(yīng)商設(shè)備封裝: 620-PBGA(29x29)
包裝: 托盤
MPC8314E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
53
High-Speed Serial Interfaces (HSSI)
between 100 mV and 400 mV. Figure 39 shows the SerDes reference clock input requirement
for DC-coupled connection scheme.
— For external AC-coupled connection, there is no common mode voltage requirement for the
clock driver. Since the external AC-coupling capacitor blocks the DC level, the clock driver
and the SerDes reference clock receiver operate in different command mode voltages. The
SerDes reference clock receiver in this connection scheme has its common mode voltage set to
XCOREVSS. Each signal wire of the differential inputs is allowed to swing below and above
the common mode voltage (XCOREVSS). Figure 40 shows the SerDes reference clock input
requirement for AC-coupled connection scheme.
Single-ended Mode
— The reference clock can also be single-ended. The SD_REF_CLK input amplitude
(single-ended swing) must be between 400mV and 800mV peak-peak (from Vmin to Vmax)
with SD_REF_CLK either left unconnected or tied to ground.
— The SD_REF_CLK input average voltage must be between 200 and 400 mV. Figure 41 shows
the SerDes reference clock input requirement for single-ended signaling mode.
— To meet the input amplitude requirement, the reference clock inputs might need to be DC or
AC-coupled externally. For the best noise performance, the reference of the clock could be DC
or AC-coupled into the unused phase (SD_REF_CLK) through the same source impedance as
the clock input (SD_REF_CLK) in use.
Figure 39. Differential Reference Clock Input DC Requirements (External DC-Coupled)
Figure 40. Differential Reference Clock Input DC Requirements (External AC-Coupled)
SD_REF_CLK
Vmax < 800 mV
Vmin > 0 V
100 mV < Vcm < 400 mV
200 mV < Input Amplitude or Differential Peak < 800 mV
SD_REF_CLK
Vcm
200 mV < Input Amplitude or Differential Peak < 800 mV
Vmax < Vcm + 400 mV
Vmin > Vcm – 400 mV
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