T2080NXE8MQLB View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

T2080NXE8MQLB

T2080 QorIQ integrated multicore communications processor

NXP Semiconductors. 

Hardware design considerations

4.1.3 SerDes PLL ratio

The clock ratio between each of the two SerDes PLLs and their respective externally

supplied SDn_REF_CLKn_P/SDn_REF_CLKn_N inputs is determined by a set of RCW

Configuration fields-SRDS_PRTCL_Sn, SRDS_PLL_REF_CLK_SEL_Sn, and

SRDS_DIV_*_Sn-as shown in this table.

Table 123. Valid SerDes RCW encodings and reference clocks

SerDes protocol (given

lane)

Valid reference

clock

frequency

Legal setting for

SRDS_PRTCL_Sn

Legal setting

for

SRDS_PLL_RE

F_CLK_SEL_Sn

Legal setting for

SRDS_DIV_*_Sn

Notes

High-speed serial and debug interfaces

PCI Express 2.5 GT/s

100 MHz

Any PCIe

0b0: 100 MHz 2b10: 2.5 G

1

(doesn't negotiate upwards) 125 MHz

0b1: 125 MHz

1

PCI Express 5 GT/s

100 MHz

Any PCIe

0b0: 100 MHz 2b01: 5.0 G

1

(can negotiate up to 5 GT/s) 125 MHz

0b1: 125 MHz

1

PCI Express 8 GT/s

100 MHz

Any PCIe

0b0: 100 MHz 2b00: 8.0 G

1

(can negotiate up to 8 GT/s) 125 MHz

0b1: 125 MHz

1

Serial RapidIO 2.5 GBaud

100 MHz

SRIO @ 2.5/5 GBaud

0b0: 100 MHz 0b1: 2.5 G

-

125 MHz

0b1: 125 MHz

-

Serial RapidIO 3.125 GBaud 125 MHz

SRIO @ 3.125 GBaud 0b0: 125 MHz Don't care

-

156.25 MHz

0b1: 156.25 MHz

-

Serial RapidIO 5 GBaud

100 MHz

SRIO @ 2.5/5 GBaud

0b0: 100 MHz 0b0: 5.0 G

-

125 MHz

0b1: 125 MHz

-

SATA (1.5 or 3 Gbps)

100 MHz

Any SATA

0b0: 100 MHz Don't care

2

125 MHz

0b1: 125 MHz

Debug (2.5 GBaud)

100 MHz

Aurora @ 2.5/5 GBaud 0b0: 100 MHz 0b1: 2.5 G

-

125 MHz

0b1: 125 MHz

-

Debug (5 GBaud)

100 MHz

Aurora @ 2.5/5 GBaud 0b0: 100 MHz 0b0: 5.0 G

-

125 MHz

0b1: 125 MHz

-

Networking interfaces

SGMII (1.25 GBaud)

100 MHz

SGMII @ 1.25 GBaud

0b0: 100 MHz Don't care

-

125 MHz

1000Base-KX @ 1.25

0b1: 125 MHz

-

GBaud

2.5x SGMII (3.125 GBaud) 125 MHz

SGMII @ 3.125 GBaud 0b0: 125 MHz Don't care

-

156.25 MHz

0b1: 156.25 MHz

-

XAUI (3.125 GBaud)

125 MHz

XAUI @ 3.125 GBaud

0b0: 125 MHz Don't care

-

156.25 MHz

0b1: 156.25 MHz

-

HiGig or HiGig2 (3.125

125 MHz

HiGig @ 3.125 GBaud 0b0: 125 MHz Don't care

-

GBaud)

156.25 MHz

0b1: 156.25 MHz

-

HiGig or HiGig2 (3.75 GBaud) 125 MHz

HiGig @ 3.75 GBaud

0b0: 125 MHz Don't care

-

156.25 MHz

0b1: 156.25 MHz

-

Table continues on the next page...

QorIQ T2080 Data Sheet, Rev. 3, 03/2018

152

NXP Semiconductors

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