MPC8314ECVRADDA Freescale Semiconductor, MPC8314ECVRADDA Datasheet - Page 56

• Manufacturer Part Number: MPC8314ECVRADDA
• Description: MPU POWERQUICC II PRO 620-PBGA
• Manufacturer: Freescale Semiconductor

Specifications of MPC8314ECVRADDA

• Processor Type: MPC83xx PowerQUICC II Pro 32-Bit
• Speed: 266MHz
• Voltage: 1V
• Mounting Type: Surface Mount
• Package / Case: 620-PBGA
• Processor Series: MPC8xxx
• Core: e300
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

High-Speed Serial Interfaces (HSSI)
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, in addition to
AC-coupling.
Figure 42
assumes that the DC levels of the clock driver chip is compatible with MPC8315E SerDes reference clock
input’s DC requirement.
Figure 43
Since LVDS clock driver’s common mode voltage is higher than the MPC8315E SerDes reference clock
input’s allowed range (100 to 400mV), AC-coupled connection scheme must be used. It assumes the
56
HCSL CLK Driver Chip
Total 50 Ω. Assume clock driver’s
output impedance is about 16 Ω.
Clock Driver
Clock Driver
Figure 42. DC-Coupled Differential Connection with HCSL Clock Driver (Reference Only)
shows the SerDes reference clock connection reference circuits for HCSL type clock driver. It
shows the SerDes reference clock connection reference circuits for LVDS type clock driver.
CLK_Out
CLK_Out
CLK_Out
Figure 42
fact that clock driver chip's internal structure, output impedance and
termination requirements are different between various clock driver chip
manufacturers, it’s very possible that the clock circuit reference designs
provided by clock driver chip vendor are different from what is shown
below. They might also vary from one vendor to the other. Therefore,
Freescale Semiconductor can neither provide the optimal clock driver
reference circuits, nor guarantee the correctness of the following clock
driver connection reference circuits. The system designer is recommended
to contact the selected clock driver chip vendor for the optimal reference
circuits with the MPC8315E SerDes reference clock receiver requirement
provided in this document.
MPC8314E PowerQUICC
to
33 Ω
33 Ω
Figure 45
Clock driver vendor dependent
source termination resistor
100 Ω differential PWB trace
below are for conceptual reference only. Due to the
™
II Pro Processor Hardware Specifications, Rev. 0
NOTE
SD_REF_CLK
SD_REF_CLK
50 Ω
50 Ω
Freescale Semiconductor
MPC8315E
SerDes Refer.
CLK Receiver