1.0 Pin Description
CX28331/CX28332/CX28333
1.1 Pin Assignments
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Table 1-1. CX2833i-1x Pin Definitions (2 of 6)
Pin #
Signal Name
Description
I/O/P
Notes
CX28331-1x CX28332-1x CX28333-1x
Digital Data Pins
54
—
55
—
—
—
—
—
—
68
—
69
33
32
—
—
—
68
—
69
54
55
33
32
RPOS/
RNRZ
Ch1 receive Positive rail
or NRZ data
O
Resynchronized receive data
intended to be strobed out by the
corresponding RCLK.
RPOS1/
RNRZ1
When ENDECDIS = 1, these outputs
are positive and negative AMI data
(RPOS and RNEG).
RNEG/
RLCV
Ch1 receive Negative rail
or line code violation
O
RNEG1/
RLCV1
When ENDECDIS = 0, these outputs
are decoded NRZ data (RNRZ) and
line code violation (RLCV). A line
code violation is indicated when
RLCV = 1.
RPOS2/
RNRZ2
Ch2 receive Positive rail
or NRZ data
O
O
O
O
O
RNEG2/
RLCV2
Ch2 receive Negative rail
or line code violation
See notes on the ENDECDIS pin in
the Control Signals section.
RPOS3/
RNRZ3
Ch3 receive Positive rail
or NRZ data
RNEG3/
RLCV3
Ch3 receive Negative rail
or line code violation
53
—
—
—
49
—
67
34
—
—
—
67
53
34
—
RCLK
RCLK1
RCLK2
RCLK3
Receive clock Ch1
Recovered clock for each channel
receiver, intended for strobing the
corresponding RDAT into the
following framer or logic.
Receive clock Ch2
Receive clock Ch3
O
O
I
TPOS/
TNRZ
Ch1 transmit Positive
rail or NRZ data
Synchronized transmit data
intended to be strobed in by the
corresponding TCLK.
—
48
—
—
—
—
—
63
—
64
38
37
—
—
63
—
64
49
48
38
37
TPOS1/
TNRZ1
When ENDECDIS = 1, these inputs
are expected to be positive and
negative AMI data (TPOS and
TNEG).
TNEG/
NC
Ch1 transmit Negative
rail or no connect data
I
TNEG1/
NC1
When ENDECDIS = 0, these inputs
are expected to be uncoded NRZ
data (TNRZ) and no connects (NC).
TPOS2/
TNRZ2
Ch2 transmit Positive or
NRZ data
I
I
I
I
TNEG2/
NC2
Ch2 transmit Negative
rail or no connect data
See notes on the ENDECDIS pin in
the Control Signals section.
TPOS3/
TNRZ3
Ch3 transmit Positive or
NRZ data
TNEG3/
NC3
Ch3 transmit Negative
rail or no connect data
1-6
Conexant
100985A
CONEXANT [ CONEXANT SYSTEMS, INC ]
