MPC8572DS Freescale Semiconductor, MPC8572DS Datasheet - Page 76

• Manufacturer Part Number: MPC8572DS
• Description: KIT MPU POWERQUICC III
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC III™r
• Type: MPUr

Specifications of MPC8572DS

• Contents: Board
• Data Rate: 10 Mbps to 100 Mbps
• Memory Type: Flash, DDR, DDR2, DDR3, SDRAM
• Interface Type: I2C, Ethernet
• Operating Voltage: 3.3 V
• Data Bus Width: 32 bit
• Product: Development Tools
• Silicon Manufacturer: Freescale
• Core Architecture: Power Architecture
• Core Sub-architecture: PowerQUICC
• Silicon Core Number: MPC85xx
• Silicon Family Name: PowerQUICC III
• Rohs Compliant: Yes
• For Use With/related Products: MPC8572E
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Speed Serial Interfaces (HSSI)
15.2.3
76
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SD n _REF_CLK
SD n _REF_CLK
With on-chip termination to SGND_SRDSn (xcorevss), the differential reference clocks inputs are
HCSL (High-Speed Current Steering Logic) compatible DC-coupled.
Many other low voltage differential type outputs like LVDS (Low Voltage Differential Signaling)
can be used but may need to be AC-coupled due to the limited common mode input range allowed
(100 to 400 mV) for DC-coupled connection.
LVPECL outputs can produce signal with too large amplitude and may need to be DC-biased at
clock driver output first, then followed with series attenuation resistor to reduce the amplitude,
additionally to AC-coupling.
Figure 46. Differential Reference Clock Input DC Requirements (External AC-Coupled)
Interfacing With Other Differential Signaling Levels
SD n _REF_CLK
SD n _REF_CLK
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
Figure 47. Single-Ended Reference Clock Input DC Requirements
200 mV < Input Amplitude or Differential Peak < 800 mV
400 mV
<
SD n _REF_CLK Input Amplitude
<
800 mV
Vmin
Vmax
0 V
Freescale Semiconductor
>
<
Vcm – 400 mV
Vcm + 400 mV
Vcm