参数资料
型号: MPC8545EVUATG
厂商: Freescale Semiconductor
文件页数: 120/151页
文件大小: 0K
描述: IC MPU PWRQUICC III 783-FCCBGA
标准包装: 1
系列: MPC85xx
处理器类型: 32-位 MPC85xx PowerQUICC III
速度: 1.2GHz
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
70
Freescale Semiconductor
High-Speed Serial Interfaces (HSSI)
Figure 43 shows the SerDes reference clock connection reference circuits for HCSL type clock driver. It
assumes that the DC levels of the clock driver chip is compatible with SerDes reference clock input’s DC
requirement.
Figure 43. DC-Coupled Differential Connection with HCSL Clock Driver (Reference Only)
Figure 44 shows the SerDes reference clock connection reference circuits for LVDS type clock driver.
Since LVDS clock driver’s common mode voltage is higher than the SerDes reference clock input’s
allowed range (100–400 mV), AC-coupled connection scheme must be used. It assumes the LVDS output
driver features 50-
termination resistor. It also assumes that the LVDS transmitter establishes its own
common mode level without relying on the receiver or other external component.
Figure 44. AC-Coupled Differential Connection with LVDS Clock Driver (Reference Only)
Figure 45 shows the SerDes reference clock connection reference circuits for LVPECL type clock driver.
Since LVPECL driver’s DC levels (both common mode voltages and output swing) are incompatible with
the SerDes reference clock input’s DC requirement, AC-coupling must be used. Figure 45 assumes that
the LVPECL clock driver’s output impedance is 50
R1 is used to DC-bias the LVPECL outputs prior
50
50
SD_REF_CLK
Clock Driver
100
Differential PWB Trace
Clock driver vendor dependent
source termination resistor
CLK_Out
HCSL CLK Driver Chip
33
33
Total 50
Assume clock driver’s
output impedance is about 16
MPC8548E
CLK_Out
SerDes Refer.
CLK Receiver
Clock Driver
SD_REF_CLK
Clock Driver
100
Differential PWB Trace
CLK_Out
LVDS CLK Driver Chip
10 nF
MPC8548E
SerDes Refer.
CLK Receiver
50
50
Clock Driver
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