mpc8536e Freescale Semiconductor, Inc, mpc8536e Datasheet - Page 91

• Manufacturer Part Number: mpc8536e
• Description: Mpc8536e Powerquicctm Iii Integrated Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Figure 55
Figure 56
2.20
The MPC8536E features two Serializer/Deserializer (SerDes) interfaces to be used for high-speed serial interconnect
applications. The SerDes1 interface is dedicated for PCI Express data transfers. The SerDes2 can be used for SGMII or SATA.
This section describes the common portion of SerDes DC electrical specifications, which is the DC requirement for SerDes
Reference Clocks. The SerDes data lane’s transmitter and receiver reference circuits are also shown.
2.20.1 Signal Terms Definition
The SerDes utilizes differential signaling to transfer data across the serial link. This section defines terms used in the description
and specification of differential signals.
Figure 57
shows waveform for either a transmitter output (SDn_TX and SDn_TX) or a receiver input (SDn_RX and SDn_RX). Each
signal swings between A Volts and B Volts where A > B.
Using this waveform, the definitions are as follows. To simplify illustration, the following definitions assume that the SerDes
transmitter and receiver operate in a fully symmetrical differential signaling environment.
The transmitter output signals and the receiver input signals SDn_TX, SDn_TX, SDn_RX and SDn_RX each have a
The Differential Output Voltage (or Swing) of the transmitter, V
Freescale Semiconductor
1.
2.
3.
Single-Ended Swing
Differential Output Voltage, V
Differential Input Voltage, V
shows how the signals are defined. For illustration purposes, only one SerDes lane is used for description. The figure
shows the PCI input AC timing conditions.
shows the PCI output AC timing conditions.
High-Speed Serial Interfaces
MPC8536E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 2
High-Impedance
peak-to-peak swing of A - B Volts. This is also referred as each signal wire’s Single-Ended Swing.
voltages: V
Figure 56. PCI Output AC Timing Measurement Condition
Figure 55. PCI Input AC Timing Measurement Conditions
Output Delay
Input
CLK
Output
ID
CLK
SDn_TX
OD
(or Differential Input Swing):
(or Differential Output Swing):
- V
t
PCIVKH
SDn_TX.
The V
t
OD
PCKHOZ
, is defined as the difference of the two complimentary output
t
OD
PCKHOV
value can be either positive or negative.
t
PCIXKH
High-Speed Serial Interfaces
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