mpc8314e Freescale Semiconductor, Inc, mpc8314e Datasheet - Page 51

• Manufacturer Part Number: mpc8314e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Figure 36
15 High-Speed Serial Interfaces (HSSI)
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.
15.1
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 37
description. The figure shows waveform for either a transmitter output (TXn and TXn) or a receiver input
(RXn and RXn). 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.
Freescale Semiconductor
1. Single-Ended Swing
2. Differential Output Voltage, V
3. Differential Input Voltage, V
4. Differential Peak Voltage, V
The transmitter output signals and the receiver input signals TXn, TXn, RXn and RXn each have
a peak-to-peak swing of A – B Volts. This is also referred as each signal wire’s Single-Ended
Swing.
The Differential Output Voltage (or Swing) of the transmitter, V
the two complimentary output voltages: V
negative.
The Differential Input Voltage (or Swing) of the receiver, V
two complimentary input voltages: V
Signal Terms Definition
shows the PCI output AC timing conditions.
shows how the signals are defined. For illustration purpose, only one SerDes lane is used for
MPC8314E PowerQUICC
High-Impedance
Output Delay
Figure 36. PCI Output AC Timing Measurement Condition
Output
CLK
DIFFp
ID
OD
™
(or Differential Input Swing):
II Pro Processor Hardware Specifications, Rev. 0
(or Differential Output Swing):
RXn
– V
TXn
t
RXn.
PCKHOV
– V
The V
TXn.
The V
ID
value can be either positive or negative.
ID
OD
t
, is defined as the difference of the
PCKHOZ
t
PCKHOX
OD
value can be either positive or
, is defined as the difference of
High-Speed Serial Interfaces (HSSI)
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