CX28331 datasheet(16/68 Pages) CONEXANT

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1.0 Pin Description

CX28331/CX28332/CX28333

1.1 Pin Assignments

Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit

1-6

Conexant

100985A

Digital Data Pins

——

RPOS/

RNRZ

Ch1 receive Positive rail

or NRZ data

Resynchronized receive data

intended to be strobed out by the

corresponding RCLK.

When ENDECDIS = 1, these outputs

are positive and negative AMI data

(RPOS and RNEG).

When ENDECDIS = 0, these outputs

are decoded NRZ data (RNRZ) and

line code violation (RLCV). A line

code violation is indicated when

RLCV = 1.

See notes on the ENDECDIS pin in

the Control Signals section.

—

RPOS1/

RNRZ1

——

RNEG/

RLCV

Ch1 receive Negative rail

or line code violation

—

RNEG1/

RLCV1

—

RPOS2/

RNRZ2

Ch2 receive Positive rail

or NRZ data

—

RNEG2/

RLCV2

Ch2 receive Negative rail

or line code violation

——

RPOS3/

RNRZ3

Ch3 receive Positive rail

or NRZ data

——

RNEG3/

RLCV3

Ch3 receive Negative rail

or line code violation

——

RCLK

Receive clock Ch1

Recovered clock for each channel

receiver, intended for strobing the

corresponding RDAT into the

following framer or logic.

—

RCLK1

—

RCLK2

Receive clock Ch2

——

RCLK3

Receive clock Ch3

——

TPOS/

TNRZ

Ch1 transmit Positive

rail or NRZ data

Synchronized transmit data

intended to be strobed in by the

corresponding TCLK.

When ENDECDIS = 1, these inputs

are expected to be positive and

negative AMI data (TPOS and

TNEG).

When ENDECDIS = 0, these inputs

are expected to be uncoded NRZ

data (TNRZ) and no connects (NC).

See notes on the ENDECDIS pin in

the Control Signals section.

—

TPOS1/

TNRZ1

——

TNEG/

Ch1 transmit Negative

rail or no connect data

—

TNEG1/

NC1

—

TPOS2/

TNRZ2

Ch2 transmit Positive or

NRZ data

—

TNEG2/

NC2

Ch2 transmit Negative

rail or no connect data

——

TPOS3/

TNRZ3

Ch3 transmit Positive or

NRZ data

——

TNEG3/

NC3

Ch3 transmit Negative

rail or no connect data

Table 1-1. CX2833i-1x Pin Definitions (2 of 6)

Pin #

Signal Name

Description

I/O/P

Notes

CX28331-1x CX28332-1x CX28333-1x

CX28331 Datasheet(PDF) 16 Page - Synaptics Incorporated.

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