PM8621 datasheet(18/184 Pages) PMC

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NSE-8G™ Standard Product Data Sheet

Preliminary

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

Document ID: PMC-2010850, Issue 1

Block Diagram

The NSE-8G is organized as a DS0 granularity space switch. Alternatively, the NSE-8G is

organized as a self aligning (with respect to STS-12 boundaries in TelecomBus mode)

VT1.5/VT2 granularity space switch.

Figure 5 NSE- 8G Block Diagram Showing Functional Blocks

Clock

Synthesis

Unit

Ref

Microprocessor Interface

JTAG

LVDS

Receiver

(RXLV)

Data

Recovery

Unit

(DRU)

Receive

8B/10B

Decoder

(R8TD)

RP[0]

RN[0]

1/2

In-Band

Link

Controller

(ILC)

TP[0]

TN[0]

LVDS

Transmitt

(TXLV)

Transmit

Serializer

(PISO)

Transmit

8B/10B

Encoder

(T8TE)

1/2

In-Band

Link

Controller

(ILC)

LVDS

Receiver

(RXLV)

Data

Recovery

Unit

(DRU)

Receive

8B/10B

Decoder

(R8TD)

RP[1]

RN[1]

1/2

In-Band

Link

Controller

(ILC)

TP[1]

TN[1]

Transmit

8B/10B

Encoder

(T8TE)

1/2

In-Band

Link

Controller

(ILC)

LVDS

Receiver

(RXLV)

Data

Recovery

Unit

(DRU)

Receive

8B/10B

Decoder

(R8TD)

RP[11]

RN[11]

1/2

In-Band

Link

Controller

(ILC)

TP[11]

TN[11]

Transmit

8B/10B

Encoder

(T8TE)

1/2

In-Band

Link

Controller

(ILC)

LVDS

Transmitt

(TXLV)

LVDS

Transmitt

(TXLV)

Transmit

Serializer

(PISO)

Transmit

Serializer

(PISO)

DS0 Crossbar Switch

(DCB)

RC1FP

CMP

SYSCLK

The R8TD, in combination with the RXLV and DRU receive, decode and align incoming

SBI336/STS-12-equivalent LVDS links. Outputs are provided to the primary switching flow and

to the in-band signaling channel. These provide all analog and digital functions to terminate a

full-duplex 777.6 MHz serial SBI336S or 777.6 MHz serial TelecomBus on LVDS.

A 12 X 12 DS0 Crossbar Switch(DCB) stage switches data and control signals between the 12

ports. The switching instructions are stored in two pages of ram configured as offline and online

allowing the user to modify the offline page.

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