P5010NXN1QMB Freescale Semiconductor, P5010NXN1QMB Datasheet - Page 108

• Manufacturer Part Number: P5010NXN1QMB
• Description: Processors - Application Specialized P5010 Ext Tmp NoEnc 1600/1200 r2.0
• Manufacturer: Freescale Semiconductor

Specifications of P5010NXN1QMB

• Rohs: yes

Electrical Characteristics
108
•
SD_REF_CLKn
SD_REF_CLKn
— For an external AC-coupled connection, there is no common mode voltage requirement for the clock driver.
Single-Ended Mode
— The reference clock can also be single-ended. The SD_REF_CLKn input amplitude (single-ended swing) must be
— The SD_REF_CLKn input average voltage must be between 200 and 400 mV.
— To meet the input amplitude requirement, the reference clock inputs may need to be DC- or AC-coupled
Figure 39. Differential Reference Clock Input DC Requirements (External AC-Coupled)
Because the external AC-coupling capacitor blocks the DC level, the clock driver and the SerDes reference clock
receiver operate in different common mode voltages. The SerDes reference clock receiver in this connection
scheme has its common mode voltage set to SGND. Each signal wire of the differential inputs is allowed to swing
below and above the common mode voltage (SGND).
requirement for AC-coupled connection scheme.
between 400 mV and 800 mV peak-peak (from V
tied to ground.
reference clock input requirement for single-ended signaling mode.
externally. For the best noise performance, the reference of the clock could be DC- or AC-coupled into the unused
phase (SD_REF_CLKn) through the same source impedance as the clock input (SD_REF_CLKn) in use.
SD_REF_CLKn
SD_REF_CLKn
P5020/P5010 QorIQ Integrated Processor Hardware Specifications, Rev. 0
Figure 40. Single-Ended Reference Clock Input DC Requirements
200 mV < Input Amplitude or Differential Peak < 800 mV
400 mV
<
SD_REF_CLKn Input Amplitude
MIN
to V
Figure 39
MAX
<
) with SD_REF_CLKn either left unconnected or
800 mV
shows the SerDes reference clock input
Figure 40
Vmin
Vmax
0 V
Freescale Semiconductor
>
<
shows the SerDes
Vcm – 400 mV
Vcm + 400 mV
Vcm