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CX28331 数据表(PDF) 18 Page - Synaptics Incorporated.

部件名 CX28331
功能描述  Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
PDF  68 Pages
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制造商  CONEXANT [Synaptics Incorporated.]
网页  https://www.synaptics.com/
标志 CONEXANT - Synaptics Incorporated.

CX28331 数据表(HTML) 18 Page - Synaptics Incorporated.

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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
1-8
Conexant
100985A
43
43
43
E3MODE
E3MODE
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
44
——
LBO
Transmit line Ch1
build-out mode
I
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.
—
72
72
LBO1
—
29
44
LBO2
Transmit line Ch2
build-out mode
I
——
29
LBO3
Transmit line Ch3
build-out mode
I
56
——
LLOOP
Local loopback enable
Ch1
I
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
—
74
74
LLOOP1
—
27
56
LLOOP2
Local loopback enable
Ch2
I
——
27
LLOOP3
Local loopback enable
Ch3
I
57
——
RLOOP
Remote loopback enable
Ch1
I
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
—
75
75
RLOOP1
—
26
57
RLOOP2
Remote loopback enable
Ch2
I
——
26
RLOOP3
Remote loopback enable
Ch3
I
45
——
XOE
Transmit output enable
Ch1
I
Transmit output enable per channel.
1 = transmit line output driver
enabled
0 = transmit output driver set to
high impedance state
—
71
71
XOE1
—
30
45
XOE2
Transmit output enable
Ch2
I
——
30
XOE3
Transmit output enable
Ch3
I
Table 1-1. CX2833i-1x Pin Definitions (4 of 6)
Pin #
Signal Name
Description
I/O/P
Notes
CX28331-1x CX28332-1x CX28333-1x



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