CX28332 Conexant Systems, CX28332 Datasheet - Page 18

• Manufacturer Part Number: CX28332
• Description: (CX28331 - CX28333) Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
• Manufacturer: Conexant Systems

1.0 Pin Description
1.1 Pin Assignments
Table 1-1. CX2833i-1x Pin Definitions (4 of 6)
1-8
CX28331-1x CX28332-1x CX28333-1x
43
44
—
—
—
56
—
—
—
57
—
—
—
45
—
—
—
Pin #
43
—
72
29
—
—
74
27
—
—
75
26
—
—
71
30
—
43
—
72
44
29
—
74
56
27
—
75
57
26
—
71
45
30
Signal Name
E3MODE
RLOOP1
LLOOP1
LLOOP2
LLOOP3
RLOOP2
RLOOP3
RLOOP
LLOOP
LBO1
LBO2
LBO3
XOE1
XOE2
XOE3
LBO
XOE
Conexant
E3MODE
Transmit line Ch1
build-out mode
Transmit line Ch2
build-out mode
Transmit line Ch3
build-out mode
Local loopback enable
Ch1
Local loopback enable
Ch2
Local loopback enable
Ch3
Remote loopback enable
Ch1
Remote loopback enable
Ch2
Remote loopback enable
Ch3
Transmit output enable
Ch1
Transmit output enable
Ch2
Transmit output enable
Ch3
Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
I/O/P
I
I
I
I
I
I
I
I
I
I
I
I
I
When the pin is set to high, it
enables the E3 mode on all
channels, instead of the DS3/STS-1
mode. This also changes the pulse
shaper to E3 mode and overrides all
LBO pins. It also changes the
encoder/decoder from B3ZS mode
to HDB3 mode.
1 = E3 mode
0 = DS3/STS-1 mode
Line build-out mode per channel,
based on the length of cable on the
transmit side of the cross-connect
block. This bit is overridden and the
pulse shaper is disabled (no pulse
shaping) if E3MODE = 1.
1 = Inserts line build-out into the
transmit channel. Usually used
when the transmit cable is less than
350 feet in length.
0 = Line build-out bypassed (not
inserted). Usually used when the
transmit cable is greater than 350
feet in length.
Local loopback enable per channel.
The transmit data is looped back
immediately from the encoder to
the decoder in place of the received
data.
1 = local loopback enabled
0 = local loopback disabled
Remote loopback enable per
channel. The receive data, retimed
after clock recovery, is looped back
into the AMI generator in place of
the transmit data.
1 = remote loopback enabled
0 = remote loopback disabled
Transmit output enable per channel.
1 = transmit line output driver
enabled
0 = transmit output driver set to
high impedance state
CX28331/CX28332/CX28333
Notes
100985A