Datasheet > XPIO110GXS

XPIO110GXS

更新时间： 2024-02-15 23:28:17

品牌	Logo	应用领域
莱迪思 - LATTICE		/
页数	文件大小	规格书
23页	354K
描述
Fully Integrated 10Gbps Serializer/Deserializer Device

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数据手册

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XPIO110GXS 数据手册

Lattice Semiconductor

XPIO 110GXS Data Sheet

Mode 2: Synchronous line loopback with clock clean-up. Driving LB_P622_Enb low enables line loopback

mode. In order to make this loopback mode SONET/SDH compliant the CK622OUT_P/N must be connected to a

VCXO-powered PLL chip (e.g. MAX3670), and CK622OUT_SEL pulled/driven high.The output of the PLL provides

a low jitter reference clock that is in phase with the data presented at the LVDS parallel outputs. This reference

clock is connected to REF_CK_P/N. As in Mode 1 a separate reference clock is input to RX_REF_CK_P/N to drive

the CDR logic. Data on the TX_D_P/N and RX_D_P/N pins are now synchronous, and the data repeated on

TX_D_P/N meets SONET/SDH line loopback application requirements.

Figure 4. Line Loopback Mode 2 Block Diagram

LVDS Loopback

Mode 1

LB_LVDS_ENb=1

BIST_ENb=0

BIST_LB_SC0=0

BIST_LB_SC1=1

RX_D_P

RX_D_N

10G RX

Deserializer

RX_D_LV[0..15]

LVDS

Data

RX_CK_LV_P/N

LB_P622_ENb=0

Parallel

Loopback

TX_D_P

TX_D_N

Serializer

CMU

10G TX

LVDS

Data

TX_D_LV[0..15]

TX_CL_LV_P/N

REF_CK_P/N

Low Jitter Clock

Synchronous to

REF_CK_P/N

External Low Jitter PLL

(e.g. MAX 3670)

CK622_OUT_PN

To REF_CK_P/N

CK622OUT_SEL = 1

Reference

PLL

Reference Clocks

There are two AC coupled reference clock input pairs, REF_CK_P/N, and RX_REF_CK_P/N. The CDR block is

driven by either REF_CK_P/N or RX_REF_CK_P/N. The CMU block is only driven by REF_CK_P/N. The reference

clock input frequency for REF_CK_P/N can be either 1/16^th(622MHz) or 1/64^th(155MHz) the transmitter/receiver

data rate. Likewise, RX_REF_CK_P/N can be 1/16^thor 1/64^ththe 10Gbps receiver rate. RX_REF_CK_P/N and

REF_CK_P/N are conﬁgured in tandem to 1/16^thor 1/64^thby REF_CK_SEL. They cannot be conﬁgured indepen-

dently. AC coupling for all reference clocks is recommended.

1...4 5 678 9 10...23

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