82V2048DA IDT, Integrated Device Technology Inc, 82V2048DA Datasheet - Page 22

• Manufacturer Part Number: 82V2048DA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82V2048DA

• Screening Level: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
2.17.4 DUAL LOOPBACK
bit RLBn in register RLB to ‘1’. In this configuration, after passing the
encoder, the data and clock to be transmitted are looped back to
decoder directly and output on RCLKn, RDn/RDPn and CVn/RDNn. The
recovered data from RTIPn and RRINGn are looped back to waveform
shaper through JA (if selected) and output on TTIPn and TRINGn. The
LOS Detector is still in use.
Dual Loopback mode is set by setting bit DLBn in register DLB and
TRINGn
RRINGn
TTIPn
RTIPn
RRINGn
TRINGn
RTIPn
TTIPn
Figure-18
Loopback
Analog
Detector
Peak
shows the process.
Driver
Line
Detector
Peak
Driver
Slicer
Line
Figure-16 Analog Loopback
Figure-15 Digital Loopback
Slicer
CLK&Data
Recovery
Waveform
Detector
Transmit
All Ones
(DPLL)
Shaper
LOS
Waveform
Detector
Transmit
All Ones
Shaper
CLK&Data
22
LOS
Recovery
(DPLL)
Loopback
2.17.5 TRANSMIT ALL ONES (TAOS)
for more than 16 MCLK cycles. In host mode, TAOS mode is set by
programming register TAO. In addition, automatic TAOS signals are
inserted by setting register ATAO when Loss of Signal occurs. Note that
the TAOS generator adopts MCLK as a timing reference. In order to
assure that the output frequency is within specified limits, MCLK must
have the applicable stability.
TAOS mode with Analog Loopback are shown in Figure-19,
and Figure-21.
Digital
In hardware mode, the TAOS mode is set by pulling pin TCLKn high
The TAOS mode, the TAOS mode with Digital Loopback and the
One of Eight Identical Channels
One of Eight Identical Channels
Attenuator
Attenuator
Attenuator
Attenuator
Jitter
Jitter
Jitter
Jitter
INDUSTRIAL TEMPERATURE RANGES
HDB3/AMI
HDB3/AMI
Decoder
Encoder
HDB3/AMI
HDB3/AMI
B8ZS/
B8ZS/
Encoder
Decoder
B8ZS/
B8ZS/
BPVIn/TDNn
RDn/RDPn
TDn/TDPn
LOSn
RCLKn
CVn/RDNn
TCLKn
RDn/RDPn
BPVIn/TDNn
CVn/RDNn
TDn/TDPn
RCLKn
TCLKn
LOSn
Figure-20