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CX28333-3X

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

Conexant Systems 

1.0 Pin Description

1.1 Pin Assignments

CX28331/CX28332/CX28333

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

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

Pin #

Signal Name

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

Description

I/O/P

Notes

Digital Data Pins

54

—

—

RPOS/ Ch1 receive Positive rail O Resynchronized receive data

RNRZ or NRZ data

intended to be strobed out by the

—

68

68

RPOS1/

corresponding RCLK.

RNRZ1

When ENDECDIS = 1, these outputs

55

—

—

RNEG/ Ch1 receive Negative rail O are positive and negative AMI data

RLCV or line code violation

(RPOS and RNEG).

—

69

69

RNEG1/

RLCV1

When ENDECDIS = 0, these outputs

are decoded NRZ data (RNRZ) and

—

33

54

RPOS2/ Ch2 receive Positive rail O line code violation (RLCV). A line

RNRZ2 or NRZ data

code violation is indicated when

RLCV = 1.

—

32

55

RNEG2/ Ch2 receive Negative rail O

RLCV2 or line code violation

—

—

33

RPOS3/ Ch3 receive Positive rail O See notes on the ENDECDIS pin in

RNRZ3 or NRZ data

the Control Signals section.

—

—

32

RNEG3/ Ch3 receive Negative rail O

RLCV3 or line code violation

53

—

—

RCLK Receive clock Ch1

O Recovered clock for each channel

—

67

67

RCLK1

receiver, intended for strobing the

corresponding RDAT into the

—

34

53

RCLK2 Receive clock Ch2

O following framer or logic.

—

—

34

RCLK3 Receive clock Ch3

O

49

—

—

TPOS/ Ch1 transmit Positive

I Synchronized transmit data

TNRZ rail or NRZ data

intended to be strobed in by the

—

63

63

TPOS1/

corresponding TCLK.

TNRZ1

48

—

—

TNEG/ Ch1 transmit Negative

I When ENDECDIS = 1, these inputs

NC

rail or no connect data

are expected to be positive and

—

64

64

TNEG1/

NC1

negative AMI data (TPOS and

TNEG).

—

38

49

TPOS2/ Ch2 transmit Positive or I When ENDECDIS = 0, these inputs

TNRZ2 NRZ data

are expected to be uncoded NRZ

data (TNRZ) and no connects (NC).

—

37

48

TNEG2/ Ch2 transmit Negative

I

NC2 rail or no connect data

See notes on the ENDECDIS pin in

—

—

38

TPOS3/ Ch3 transmit Positive or I the Control Signals section.

TNRZ3 NRZ data

—

—

37

TNEG3/ Ch3 transmit Negative

I

NC3 rail or no connect data

1-6

Conexant

100985A

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