IDT82P2521BHGBH中文資料瑞薩數(shù)據(jù)手冊(cè)PDF規(guī)格書

FEATURES

! Integrates 21+1 channels E1 short haul line interface units for

120 Ω E1 twisted pair cable and 75 Ω E1 coaxial cable

applications

! Per-channel configurable Line Interface options

? Supports various line interface options

? Differential and Single Ended line interfaces

? true Single Ended termination on primary and secondary side of transformer

for E1 75 Ω coaxial cable applications

? transformer-less for Differential interfaces

? Fully integrated and software selectable receive and transmit

termination

? Option 1: Fully Internal Impedance Matching with integrated receive

termination resistor

? Option 2: Partially Internal Impedance Matching with common external

resistor for improved device power dissipation

? Option 3: External impedance Matching termination

? Supports global configuration and per-channel configuration to

E1 mode

! Per-channel programmable features

? Provides E1 short haul waveform templates and userprogrammable

arbitrary waveform templates

? Provides two JAs (Jitter Attenuator) for each channel of receiver

and transmitter

? Supports AMI/HDB3 encoding and decoding

! Per-channel System Interface options

? Supports Single Rail, Dual Rail with clock or without clock and

sliced system interface

? Integrated Clock Recovery for the transmit interface to recover

transmit clock from system transmit data

! Per-channel system and diagnostic functions

? Provides transmit driver over-current detection and protection

with optional automatic high impedance of transmit interface

? Detects and generates PRBS (Pseudo Random Bit Sequence),

ARB (Arbitrary Pattern) and IB (Inband Loopback) in either

receive or transmit direction

? Provides defect and alarm detection in both receive and transmit

directions.

? Defects include BPV (Bipolar Violation) /CV (Code Violation) and EXZ

(Excessive Zeroes)

? Alarms include LLOS (Line LOS), SLOS (System LOS), TLOS

(Transmit LOS) and AIS (Alarm Indication Signal)

? Programmable LLOS detection /clear levels. Compliant with ITU

and ANSI specifications

? Various pattern, defect and alarm reporting options

? Serial hardware LLOS reporting (LLOS, LLOS0) for all 22 channels

? Configurable per-channel hardware reporting with RMF/TMF

(Receive /Transmit Multiplex Function)

? Register access to individual registers or 16-bit error counters