MSC8157ETVT1000A Freescale Semiconductor, MSC8157ETVT1000A Datasheet - Page 60

• Manufacturer Part Number: MSC8157ETVT1000A
• Description: Digital Signal Processors & Controllers - DSP, DSC Qual 8157 EN FG 1GHz -45 to 105c
• Manufacturer: Freescale Semiconductor

Specifications of MSC8157ETVT1000A

• Rohs: yes
• Core: SC3850
• Data Bus Width: 32 bit
• Program Memory Size: 32 KB
• Data Ram Size: 512 KB
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Operating Supply Voltage: 0.97 V to 1.05 V
• Maximum Operating Temperature: + 105 C
• Package / Case: FCPBGA-783
• Mounting Style: SMD/SMT

Electrical Characteristics
3.5.3.2
The DC-level requirements for PCI Express implementations have separate requirements for the Tx and Rx lines. The MSC8157
supports a 2.5 Gbps and a 5 Gbps PCI Express interface defined by the PCI Express Base Specification, Revision 2.0. The
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SD_REF_CLK[1–2]
SD_REF_CLK[1–2]
Single-Ended Mode
— The reference clock can also be single-ended. The SD_REF_CLK[1–2] input amplitude (single-ended swing)
— The SD_REF_CLK[1–2] 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 externally.
Figure 6. Differential Reference Clock Input DC Requirements (External AC-Coupled)
SD_REF_CLK[1–2]
must be between 400 mV and 800 mV peak-peak (from V
unconnected or tied to ground.
reference clock input requirement for single-ended signaling mode.
For the best noise performance, the reference of the clock could be DC- or AC-coupled into the unused phase
(SD_REF_CLK[1–2]) through the same source impedance as the clock input (SD_REF_CLK[1–2]) in use.
SD_REF_CLK[1–2]
DC-Level Requirements for PCI Express Configurations
Figure 7. Single-Ended Reference Clock Input DC Requirements
200 mV < Input Amplitude or Differential Peak < 800 mV
400 mV < SD_REF_CLK[1–2] Input Amplitude < 800 mV
MSC8157 Six-Core Digital Signal Processor Data Sheet, Rev. 1
MIN
to V
MAX
) with SD_REF_CLK[1–2] either left
0 V
Vmin > Vcm – 400 mV
Vmax < Vcm + 400 mV
Figure 7
Freescale Semiconductor
shows the SerDes
Vcm