MPC8308 datasheet(30/88 Pages) FREESCALE

Part #	MPC8308

Description	MPC8308 PowerQUICC II Pro Processor Hardware Specification

PDF	88 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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30 / 88 page

MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 0

Freescale Semiconductor

High-Speed Serial Interfaces (HSSI)

Figure 21 shows the SerDes reference clock connection reference circuits for LVDS type clock driver.

Since LVDS clock driver’s common mode voltage is higher than the MPC8308’s SerDes reference clock

input’s allowed range (100 to 400 mV), AC-coupled connection scheme must be used. It assumes the

LVDS output driver features 50-

Ω termination resistor. It also assumes that the LVDS transmitter

establishes its own common mode level without relying on the receiver or other external component.

Figure 21. AC-Coupled Differential Connection with LVDS Clock Driver (Reference Only)

SD_REF_CLK

Clock Driver

100

Ω differential PWB trace

SerDes Refer.

CLK Receiver

Clock Driver

CLK_Out

LVDS CLK Driver Chip

10 nF

MPC8308

MPC8308 Datasheet(PDF) 30 Page - Freescale Semiconductor, Inc