SINGLE CHANNEL T1/E1/J1 LONG HAUL/
SHORT HAUL LINE INTERFACE UNIT
IDT82V2081
FEATURES:
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Single channel T1/E1/J1 long haul/short haul line interfaces
Supports HPS (Hitless Protection Switching) for 1+1 protection
without external relays
Receiver sensitivity exceeds -36 dB@772KHz and -43 dB@1024
KHz
Programmable T1/E1/J1 switchability allowing one bill of ma-
terial for any line condition
Single 3.3 V power supply with 5 V tolerance on digital interfaces
Meets or exceeds specifications in
-
ANSI T1.102, T1.403 and T1.408
- ITU I.431, G.703,G.736, G.775 and G.823
- ETSI 300-166, 300-233 and TBR12/13
- AT&T Pub 62411
Software programmable or hardware selectable on:
- Wave-shaping templates for short haul and long haul LBO (Line Build
Out)
- Line terminating impedance (T1:100
Ω,
J1:110
Ω,
E1:75
Ω/120 Ω)
- Adjustment of arbitrary pulse shape
- JA (Jitter Attenuator) position (receive path or transmit path)
- Single rail/dual rail system interfaces
- B8ZS/HDB3/AMI line encoding/decoding
Active edge of transmit clock (TCLK) and receive clock (RCLK)
Active level of transmit data (TDATA) and receive data (RDATA)
Receiver or transmitter power down
High impedance setting for line drivers
PRBS (Pseudo Random Bit Sequence) generation and detection
with 2
15
-1 PRBS polynomials for E1
- QRSS (Quasi Random Sequence Signals) generation and detection
with 2
20
-1 QRSS polynomials for T1/J1
- 16-bit BPV (Bipolar Pulse Violation) /Excess Zero/PRBS or QRSS
error counter
- Analog loopback, Digital loopback, Remote loopback and Inband
loopback
Cable attenuation indication
Adaptive receive sensitivity
Short circuit protection and internal protection diode for line driv-
ers
LOS (Loss Of Signal) & AIS (Alarm Indication Signal) detection
Supports serial control interface, Motorola and Intel Multiplexed
interfaces and hardware control mode
Package:
IDT82V2081: 44-pin TQFP
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DESCRIPTION:
The IDT82V2081 can be configured as a single channel T1, E1 or J1 Line
Interface Unit. In receive path, an Adaptive Equalizer is integrated to
remove the distortion introduced by the cable attenuation. The IDT82V2081
also performs clock/data recovery, AMI/B8ZS/HDB3 line decoding and
detects and reports the LOS conditions. In transmit path, there is an AMI/
B8ZS/HDB3 encoder, Waveform Shaper and LBOs. There is one Jitter
Attenuator, which can be placed in either the receive path or the transmit
path. The Jitter Attenuator can also be disabled. The IDT82V2081 supports
both Single Rail and Dual Rail system interfaces. To facilitate the network
maintenance, a PRBS/QRSS generation/detection circuit is integrated in
the chip, and different types of loopbacks can be set according to the appli-
cations. Four different kinds of line terminating impedance, 75
Ω,
100
Ω,
110
Ω
and 120
Ω
are selectable. The chip also provides driver short-circuit
protection and internal protection diode. The chip can be controlled by either
software or hardware.
The IDT82V2081 can be used in LAN, WAN, Routers, Wireless Base
Stations, IADs, IMAs, IMAPs, Gateways, Frame Relay Access Devices,
CSU/DSU equipment, etc.
INDUSTRIAL TEMPERATURE RANGES
1
2003 Integrated Device Technology, Inc. All rights reserved.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
July 2004
DSC-6228/4
SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
INDUSTRIAL
TEMPERATURE RANGES
FUNCTIONAL BLOCK DIAGRAM
LOS
RCLK
RD/RDP
CV/RDN
LOS/AIS
Detector
B8ZS/
HDB3/AMI
Decoder
PRBS Detector
IBLC Detector
Data and
Clock
Recovery
Data
Slicer
Adaptive
Equalizer
Receiver
Internal
Termination
Analog
Loopback
Transmitter
Internal
Termination
TTIP
TRING
RTIP
RRING
Jitter
Attenuator
Remote
Loopback
Digital
Loopback
Waveform
Shaper/LBO
Line
Driver
TCLK
TD/TDP
TDN
B8ZS/
HDB3/AMI
Decoder
PRBS Generator
IBLC Generator
TAOS
Clock
Generator
Jitter
Attenuator
Software Control Interface
Register
Files
Pin Control
SDO /
ACK
/
RDY
RD
/
DS
/ SCLKE
SDI/
WR
/R/W
SCLK/ALE/AS
Figure-1 Block Diagram
2
MODE[1:0]
TERM
RXTXM[1:0]
PULS[3:0]
EQ
PATT[1:0]
JA[1:0]
MONT
LP[1:0]
THZ
RCLKE
RPD
RST
VDDIO
VDDD
VDDA
VDDT
MCLK
CS
AD[7:0]
INT
SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
INDUSTRIAL
TEMPERATURE RANGES
TABLE OF CONTENTS
1
2
3
IDT82V2081 PIN CONFIGURATIONS .......................................................................................... 8
PIN DESCRIPTION ....................................................................................................................... 9
FUNCTIONAL DESCRIPTION .................................................................................................... 15
3.1
CONTROL MODE SELECTION ....................................................................................... 15
3.2
T1/E1/J1 MODE SELECTION .......................................................................................... 15
3.3
TRANSMIT PATH ............................................................................................................. 15
3.3.1 TRANSMIT PATH SYSTEM INTERFACE.............................................................. 15
3.3.2 ENCODER ............................................................................................................. 15
3.3.3 PULSE SHAPER .................................................................................................... 15
3.3.3.1 Preset Pulse Templates .......................................................................... 15
3.3.3.2 LBO (Line Build Out) ............................................................................... 16
3.3.3.3 User-Programmable Arbitrary Waveform ................................................ 16
3.3.4 TRANSMIT PATH LINE INTERFACE..................................................................... 20
3.3.5 TRANSMIT PATH POWER DOWN ........................................................................ 20
3.4
RECEIVE PATH ............................................................................................................... 21
3.4.1 RECEIVE INTERNAL TERMINATION.................................................................... 21
3.4.2 LINE MONITOR ...................................................................................................... 22
3.4.3 ADAPTIVE EQUALIZER......................................................................................... 22
3.4.4 RECEIVE SENSITIVITY ......................................................................................... 22
3.4.5 DATA SLICER ........................................................................................................ 22
3.4.6 CDR (Clock & Data Recovery)................................................................................ 22
3.4.7 DECODER .............................................................................................................. 22
3.4.8 RECEIVE PATH SYSTEM INTERFACE ................................................................ 23
3.4.9 RECEIVE PATH POWER DOWN........................................................................... 23
3.5
JITTER ATTENUATOR .................................................................................................... 23
3.5.1 JITTER ATTENUATION FUNCTION DESCRIPTION ............................................ 23
3.5.2 JITTER ATTENUATOR PERFORMANCE ............................................................. 23
3.6
LOS AND AIS DETECTION ............................................................................................. 24
3.6.1 LOS DETECTION ................................................................................................... 24
3.6.2 AIS DETECTION .................................................................................................... 25
3.7
TRANSMIT AND DETECT INTERNAL PATTERNS ........................................................ 26
3.7.1 TRANSMIT ALL ONES ........................................................................................... 26
3.7.2 TRANSMIT ALL ZEROS......................................................................................... 26
3.7.3 PRBS/QRSS GENERATION AND DETECTION.................................................... 26
3.8
LOOPBACK ...................................................................................................................... 26
3.8.1 ANALOG LOOPBACK ............................................................................................ 26
3.8.2 DIGITAL LOOPBACK ............................................................................................. 26
3.8.3 REMOTE LOOPBACK............................................................................................ 26
3.8.4 INBAND LOOPBACK.............................................................................................. 28
3.8.4.1 Transmit Activate/Deactivate Loopback Code......................................... 28
3.8.4.2 Receive Activate/Deactivate Loopback Code.......................................... 28
3.8.4.3 Automatic Remote Loopback .................................................................. 28
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SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
INDUSTRIAL
TEMPERATURE RANGES
3.9
3.10
3.11
3.12
3.13
3.14
3.15
3.16
4
ERROR DETECTION/COUNTING AND INSERTION ...................................................... 29
3.9.1 DEFINITION OF LINE CODING ERROR ............................................................... 29
3.9.2 ERROR DETECTION AND COUNTING ................................................................ 29
3.9.3 BIPOLAR VIOLATION AND PRBS ERROR INSERTION ...................................... 30
LINE DRIVER FAILURE MONITORING ........................................................................... 30
MCLK AND TCLK ............................................................................................................. 31
3.11.1 MASTER CLOCK (MCLK) ...................................................................................... 31
3.11.2 TRANSMIT CLOCK (TCLK).................................................................................... 31
MICROCONTROLLER INTERFACES ............................................................................. 32
3.12.1 PARALLEL MICROCONTROLLER INTERFACE................................................... 32
3.12.2 SERIAL MICROCONTROLLER INTERFACE ........................................................ 32
INTERRUPT HANDLING .................................................................................................. 33
5V TOLERANT I/O PINS .................................................................................................. 33
RESET OPERATION ........................................................................................................ 33
POWER SUPPLY ............................................................................................................. 33
PROGRAMMING INFORMATION .............................................................................................. 34
4.1
REGISTER LIST AND MAP ............................................................................................. 34
4.2
REGISTER DESCRIPTION .............................................................................................. 35
4.2.1 CONTROL REGISTERS......................................................................................... 35
4.2.2 TRANSMIT PATH CONTROL REGISTERS........................................................... 36
4.2.3 RECEIVE PATH CONTROL REGISTERS ............................................................. 38
4.2.4 NETWORK DIAGNOSTICS CONTROL REGISTERS ........................................... 40
4.2.5 INTERRUPT CONTROL REGISTERS ................................................................... 43
4.2.6 LINE STATUS REGISTERS ................................................................................... 46
4.2.7 INTERRUPT STATUS REGISTERS ...................................................................... 48
4.2.8 COUNTER REGISTERS ........................................................................................ 49
HARDWARE CONTROL PIN SUMMARY .................................................................................. 50
TEST SPECIFICATIONS ............................................................................................................ 52
MICROCONTROLLER INTERFACE TIMING CHARACTERISTICS ......................................... 63
7.1
SERIAL INTERFACE TIMING .......................................................................................... 63
7.2
PARALLEL INTERFACE TIMING ..................................................................................... 64
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6
7
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SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
INDUSTRIAL
TEMPERATURE RANGES
LIST OF TABLES
Table-1
Table-2
Table-3
Table-4
Table-5
Table-6
Table-7
Table-8
Table-9
Table-10
Table-11
Table-12
Table-13
Table-14
Table-15
Table-16
Table-17
Table-18
Table-19
Table-20
Table-21
Table-22
Table-23
Table-24
Table-25
Table-26
Table-27
Table-28
Table-29
Table-30
Table-31
Table-32
Table-33
Table-34
Table-35
Table-36
Table-37
Table-38
Table-39
Table-40
Table-41
Table-42
Table-43
Table-44
Table-45
Table-46
Pin Description ................................................................................................................ 9
Transmit Waveform Value For E1 75
Ω
........................................................................ 17
Transmit Waveform Value For E1 120
Ω
...................................................................... 17
Transmit Waveform Value For T1 0~133 ft................................................................... 17
Transmit Waveform Value For T1 133~266 ft............................................................... 18
Transmit Waveform Value For T1 266~399 ft............................................................... 18
Transmit Waveform Value For T1 399~533 ft............................................................... 18
Transmit Waveform Value For T1 533~655 ft............................................................... 18
Transmit Waveform Value For J1 0~655 ft ................................................................... 19
Transmit Waveform Value For DS1 0 dB LBO.............................................................. 19
Transmit Waveform Value For DS1 -7.5 dB LBO ......................................................... 19
Transmit Waveform Value For DS1 -15.0 dB LBO ....................................................... 19
Transmit Waveform Value For DS1 -22.5 dB LBO ....................................................... 20
Impedance Matching for Transmitter ............................................................................ 20
Impedance Matching for Receiver ................................................................................ 21
Criteria of Starting Speed Adjustment........................................................................... 23
LOS Declare and Clear Criteria for Short Haul Mode ................................................... 24
LOS Declare and Clear Criteria for Long Haul Mode.................................................... 25
AIS Condition ................................................................................................................ 25
Criteria for Setting/Clearing the PRBS_S Bit ................................................................ 26
EXZ Definition ............................................................................................................... 29
Interrupt Event............................................................................................................... 33
Register List and Map ................................................................................................... 34
ID: Device Revision Register ........................................................................................ 35
RST: Reset Register ..................................................................................................... 35
GCF: Global Configuration Register ............................................................................. 35
TERM: Transmit and Receive Termination Configuration Register .............................. 35
JACF: Jitter Attenuation Configuration Register ........................................................... 36
TCF0: Transmitter Configuration Register 0 ................................................................. 36
TCF1: Transmitter Configuration Register 1 ................................................................. 37
TCF2: Transmitter Configuration Register 2 ................................................................. 37
TCF3: Transmitter Configuration Register 3 ................................................................. 38
TCF4: Transmitter Configuration Register 4 ................................................................. 38
RCF0: Receiver Configuration Register 0..................................................................... 38
RCF1: Receiver Configuration Register 1..................................................................... 39
RCF2: Receiver Configuration Register 2..................................................................... 40
MAINT0: Maintenance Function Control Register 0...................................................... 40
MAINT1: Maintenance Function Control Register 1...................................................... 41
MAINT2: Maintenance Function Control Register 2...................................................... 41
MAINT3: Maintenance Function Control Register 3...................................................... 41
MAINT4: Maintenance Function Control Register 4...................................................... 42
MAINT5: Maintenance Function Control Register 5...................................................... 42
MAINT6: Maintenance Function Control Register 6...................................................... 42
INTM0: Interrupt Mask Register 0 ................................................................................. 43
INTM1: Interrupt Masked Register 1 ............................................................................. 44
INTES: Interrupt Trigger Edge Select Register ............................................................. 45
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