m28333-3x Mindspeed Technologies, m28333-3x Datasheet - Page 19

• Manufacturer Part Number: m28333-3x
• Description: Single/dual/triple E3/ds3/sts-1 Line Interface Unit
• Manufacturer: Mindspeed Technologies

M28331/M28332/M28333 (–3x)
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Table 1-1. M2833i-3x Pin Definitions (5 of 9)
28333-DSH-003-A
M28331-3x M28332-3x M28333-3x
74
63
—
—
—
53
Pin #
74
—
76
49
—
53
74
—
76
63
49
53
Signal Name
Mindspeed Technologies
ENDECDIS
E3MODE
TAIS1
TAIS2
TAIS3
TAIS
Control Signals
Transmit Ch3
Encoder/decoder
disable (for all
channels)
Transmit Ch1
AIS mode enable
Transmit Ch2
AIS mode enable
AIS mode enable
E3MODE
Description
I/O/P
—
I
I
I
I
™
For testing purposes and in applications
where the decoder needs to be bypassed,
the decoder can be enabled/disabled as
follows:
1 = Dual rail pulse coded data format. Input
transmit data pins TPOS, TNRZ, TNEG and
NC are interpreted as TPOS and TNEG
(encoded positive and negative rail data).
Output receive data pins RPOS and RNRZ,
and RNEG and RLCV are interpreted as
RPOS and RNEG, with RPOS having a
positive pulse in place of every positive AMI
pulse and RNEG having a negative pulse in
place of every negative AMI pulse.
0 = NRZ format. Transmit data pins TPOS
and TNEG are interpreted as TNRZ and NC
(not connected). Receive data pins RPOS
and RNEG are interpreted as RNRZ and
RLCV. In this mode, all line code violations
are reported as active high on RLCV.
Transmission of Alarm Indication Signal
(AIS) for a given channel. Replace transmit
data with AIS signal. The AMI form of AIS
supported is alternating 1s.
AIS will overwrite data during local
loopback.
1 = AIS mode enabled
0 = AIS mode disabled
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
(+1, -1, +1, -1, +1, ...)
Notes
1.0 Pin Description
1.1 Pin Assignments
1-9