DALLAS DS26334G

DS26334
3.3V, 16-Channel, E1/T1/J1 Shortand Long-Haul Line Interface Unit
www.maxim-ic.com
GENERAL DESCRIPTION
FEATURES
The DS26334 is a 16-channel short/long-haul line
interface unit (LIU) that supports E1/T1/J1 from a
single 3.3V power supply. A single bill of material can
support
E1/T1/J1
with
minimum
external
components. Redundancy is supported through
nonintrusive monitoring, optimal high impedance
modes and configurable 1:1 or 1+1 backup
enhancements. An on-chip synthesizer generates the
E1/T1/J1 clock rates by a single master clock input of
various frequencies. Two clock output references are
also offered. The device is offered in a 256-pin
TEBGA, the smallest package available for a 16channel LIU.
§
APPLICATIONS
T1 Digital Cross-Connects
ATM and Frame Relay Equipment
Wireless Base Stations
ISDN Primary Rate Interface
E1/T1/J1 Multiplexer and Channel Banks
E1/T1/J1 LAN/WAN Routers
RTIP
TRING
§
§
§
§
§
SOFTWARE CONTROL
AND JTAG
MODE
§
§
§
LOSS
§
RPOS
RNEG
RCLK
RECEIVER
RRING
TTIP
§
§
§
FUNCTIONAL DIAGRAM
JTAG
§
§
TPOS
TNEG
TCLK
TRANSMITTER
1
§
§
16 E1, T1, or J1 Short/Long-Haul Line Interface
Units
Independent E1, T1 or J1 Selections
Software-Selectable Transmit and Receive-Side
Impedance Matching
Crystal Less Jitter Attenuator
Selectable Single-Rail and Dual-Rail Mode and
AMI or HDB3/ B8ZS Line Encoding and
Decoding
Detection and Generation of AIS
Digital/Analog Loss of Signal Detection as per
T1.231, G.775 and ETSI 300233
External Master Clock can be Multiple of
2.048MHz or 1.544MHz for T1/J1 or E1
Operation. This Clock will be Internally Adapted
for T1 or E1 Usage.
Receiver Signal Level Indicator from -2.5dB to
-38dB in T1 Mode and –3dB to –43dB in E1
Mode in 2.5dB Increments
Two Built-In BERT Testers for Diagnostics
8-Bit Parallel Interface Support for Intel or
Motorola Mode or a 4-Wire Serial Interface
Transmit Short Circuit Protection
G.772 Nonintrusive Monitoring
Receive Monitor Mode Handles Combinations of
14dB to 30dB of Resistive Attenuation Along with
12dB to 30dB of Cable Attenuation
Specification Compliance to the Latest T1 and
E1 Standards—ANSI T1.102, AT&T Pub 62411,
T1.231, T1.403, ITU G.703, G.742, G.775,
G.823, ETSI 300 166, and ETSI 300 233
Single 3.3V Supply with 5V Tolerant I/O
JTAG Boundary Scan as per IEEE 1149.1
ORDERING INFORMATION
PART
DS26334G
16
DS26334GN
TEMP RANGE
PIN-PACKAGE
0°C to +70°C
256 TEBGA
-40°C to +85°C
256 TEBGA
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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REV: 070105
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
TABLE OF CONTENTS
1
STANDARDS COMPLIANCE ........................................................................................................ 6
1.1 TELECOM SPECIFICATIONS COMPLIANCE ....................................................................................... 6
2
DETAILED DESCRIPTION ............................................................................................................ 7
3
BLOCK DIAGRAMS ...................................................................................................................... 8
4
PIN DESCRIPTION ...................................................................................................................... 10
5
FUNCTIONAL DESCRIPTION ..................................................................................................... 18
5.1 PORT OPERATION ...................................................................................................................... 18
5.1.1 Serial Port Operation.............................................................................................................................. 18
5.1.2 Parallel Port Operation ........................................................................................................................... 19
5.1.3 Interrupt Handling................................................................................................................................... 19
5.2
5.3
5.4
POWER-UP AND RESET .............................................................................................................. 20
MASTER CLOCK ......................................................................................................................... 20
TRANSMITTER ............................................................................................................................ 21
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.5
RECEIVER .................................................................................................................................. 28
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.6
5.7
5.8
Transmit Line Templates........................................................................................................................ 23
LIU Transmit Front End .......................................................................................................................... 26
Dual Rail ................................................................................................................................................. 27
Single-Rail Mode .................................................................................................................................... 27
Zero Suppression—B8ZS or HDB3 ....................................................................................................... 27
Transmit Power-Down............................................................................................................................ 27
Transmit All Ones................................................................................................................................... 28
Drive Failure Monitor .............................................................................................................................. 28
Receiver Monitor Mode .......................................................................................................................... 28
Peak Detector and Slicer ....................................................................................................................... 28
Receive Level Indicator .......................................................................................................................... 28
Clock and Data Recovery ...................................................................................................................... 29
Loss of Signal......................................................................................................................................... 29
AIS.......................................................................................................................................................... 30
Bipolar Violation and Excessive Zero Detector ...................................................................................... 31
JITTER ATTENUATOR .................................................................................................................. 31
G.772 MONITOR ........................................................................................................................ 32
LOOPBACKS ............................................................................................................................... 32
5.8.1 Analog Loopback.................................................................................................................................... 32
5.8.2 Digital Loopback..................................................................................................................................... 33
5.8.3 Remote Loopback .................................................................................................................................. 34
5.9
BERT........................................................................................................................................ 34
5.9.1
5.9.2
5.9.3
5.9.4
6
REGISTER MAPS AND DEFINITION .......................................................................................... 39
6.1 REGISTER DESCRIPTION ............................................................................................................. 48
6.1.1
6.1.2
6.1.3
6.1.4
7
General Description................................................................................................................................ 34
Configuration and Monitoring ................................................................................................................. 35
Receive Pattern Detection ..................................................................................................................... 36
Transmit Pattern Generation.................................................................................................................. 38
Primary Register Bank ........................................................................................................................... 48
Secondary Register Bank ...................................................................................................................... 61
Individual LIU Register Bank.................................................................................................................. 64
BERT Registers...................................................................................................................................... 81
JTAG-BOUNDARY-SCAN ARCHITECTURE AND TEST-ACCESS PORT ................................. 88
7.1 TAP CONTROLLER STATE MACHINE ............................................................................................ 89
7.2 INSTRUCTION REGISTER ............................................................................................................. 92
7.3 TEST REGISTERS ....................................................................................................................... 93
7.4 BOUNDARY SCAN REGISTER ....................................................................................................... 93
7.5 BYPASS REGISTER ..................................................................................................................... 93
7.6 IDENTIFICATION REGISTER .......................................................................................................... 93
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
8
DC ELECTRICAL CHARACTERIZATION ................................................................................... 94
9
AC TIMING CHARACTERISTICS ................................................................................................ 95
9.1 LINE INTERFACE CHARACTERISTICS ............................................................................................ 95
9.2 PARALLEL HOST INTERFACE TIMING CHARACTERISTICS ............................................................... 96
9.3 SERIAL PORT ........................................................................................................................... 108
9.4 SYSTEM TIMING ....................................................................................................................... 109
9.5 JTAG TIMING .......................................................................................................................... 111
10 PIN ASSIGNMENT..................................................................................................................... 112
11 PACKAGE INFORMATION........................................................................................................ 113
12
THERMAL INFORMATION ........................................................................................................ 114
13
REVISION HISTORY.................................................................................................................. 115
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
LIST OF FIGURES
Figure 3-1. Block Diagram ........................................................................................................................................... 8
Figure 3-2. Receive Logic Detail.................................................................................................................................. 9
Figure 3-3. Transmit Logic Detail................................................................................................................................. 9
Figure 5-1. Serial Port Operation for Write Access ................................................................................................... 18
Figure 5-2. Serial Port Operation for Read Access with CLKE = 0 ........................................................................... 18
Figure 5-3. Serial Port Operation for Read Access with CLKE = 1 ........................................................................... 19
Figure 5-4. Interrupt Handling Flow Diagram ............................................................................................................ 20
Figure 5-5. Pre-Scaler PLL and Clock Generator...................................................................................................... 21
Figure 5-6. T1 Transmit Pulse Templates ................................................................................................................. 24
Figure 5-7. E1 Transmit Pulse Templates ................................................................................................................. 25
Figure 5-8. LIU Front End .......................................................................................................................................... 26
Figure 5-9. Jitter Attenuation ..................................................................................................................................... 32
Figure 5-10. Analog Loopback................................................................................................................................... 33
Figure 5-11 Digital Loopback..................................................................................................................................... 33
Figure 5-12. Remote Loopback ................................................................................................................................. 34
Figure 5-13. PRBS Synchronization State Diagram.................................................................................................. 36
Figure 5-14. Repetitive Pattern Synchronization State Diagram ............................................................................... 37
Figure 7-1. JTAG Functional Block Diagram ............................................................................................................. 88
Figure 7-2. TAP Controller State Diagram................................................................................................................. 91
Figure 9-1. Intel Nonmuxed Read Cycle ................................................................................................................... 97
Figure 9-2. Intel Mux Read Cycle .............................................................................................................................. 98
Figure 9-3. Intel Nonmux Write Cycle...................................................................................................................... 100
Figure 9-4. Intel Mux Write Cycle ............................................................................................................................ 101
Figure 9-5. Motorola Nonmux Read Cycle .............................................................................................................. 103
Figure 9-6. Motorola Mux Read Cycle ..................................................................................................................... 104
Figure 9-7. Motorola Nonmux Write Cycle .............................................................................................................. 106
Figure 9-8. Motorola Mux Write Cycle ..................................................................................................................... 107
Figure 9-9. Serial Bus Timing Write Operation ........................................................................................................ 108
Figure 9-10. Serial Bus Timing Read Operation with CLKE = 0.............................................................................. 108
Figure 9-11. Serial Bus Timing Read Operation with CLKE = 1.............................................................................. 108
Figure 9-12. Transmitter Systems Timing................................................................................................................ 109
Figure 9-13. Receiver Systems Timing ................................................................................................................... 110
Figure 9-14. JTAG Timing ....................................................................................................................................... 111
Figure 10-1. 256-Ball TEBGA .................................................................................................................................. 112
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
LIST OF TABLES
Table 4-1. Pin Descriptions........................................................................................................................................ 10
Table 5-1. Parallel Port Mode Selection and Pin Functions ...................................................................................... 19
Table 5-2. Telecommunications Specification Compliance for DS26334 Transmitters ............................................ 22
Table 5-3. Registers Related to Control of DS26334 Transmitters ........................................................................... 22
Table 5-4. Template Selections for Short-Haul Mode ............................................................................................... 23
Table 5-5. Template Selections for Long-Haul Mode ................................................................................................ 23
Table 5-6. LIU Front-End Values ............................................................................................................................... 27
Table 5-7. Loss Criteria T1.231, G.775, and ETSI 300 233 Specifications............................................................... 29
Table 5-8. AIS Criteria T1.231, G.775, and ETSI 300 233 Specifications................................................................. 30
Table 5-9. AIS Detection and Reset Criteria for DS26334 ........................................................................................ 30
Table 5-10. Registers Related to AIS Detection........................................................................................................ 30
Table 5-11. BPV, Code Violation, and Excessive Zero Error Reporting ................................................................... 31
Table 5-12. Pseudorandom Pattern Generation........................................................................................................ 35
Table 5-13. Repetitive Pattern Generation ................................................................................................................ 35
Table 6-1. Primary Register Set ................................................................................................................................ 40
Table 6-2. Secondary Register Set............................................................................................................................ 41
Table 6-3. Individual LIU Register Set ....................................................................................................................... 42
Table 6-4. BERT Register Set ................................................................................................................................... 43
Table 6-5. Primary Register Set Bit Map ................................................................................................................... 44
Table 6-6. Secondary Register Set Bit Map .............................................................................................................. 45
Table 6-7. Individual LIU Register Set Bit Map.......................................................................................................... 46
Table 6-8. BERT Register Bit Map ............................................................................................................................ 47
Table 6-9. G.772 Monitoring Control (LIU 1) ............................................................................................................. 53
Table 6-10. G.772 Monitoring Control (LIU 9) ........................................................................................................... 53
Table 6-12. TST Template Select Transmitter Register ............................................................................................ 57
Table 6-13. TST Template Select Transmitter Register ............................................................................................ 57
Table 6-14. Template Selection................................................................................................................................. 58
Table 6-15. Address Pointer Bank Selection............................................................................................................. 61
Table 6-16. DS26334 MCLK Selections .................................................................................................................... 67
Table 6-17. Receiver Sensitivity/Monitor Mode Gain Selection ................................................................................ 72
Table 6-18. Receiver Signal Level............................................................................................................................. 73
Table 6-19. Bit Error Rate Transceiver Select for Channels 1–8 .............................................................................. 76
Table 6-20. Bit Error Rate Transceiver Select for Channels 9–16 ............................................................................ 76
Table 6-21. PLL Clock Select .................................................................................................................................... 78
Table 6-22. Clock A Select ........................................................................................................................................ 79
Table 7-1. Instruction Codes for IEEE 1149.1 Architecture....................................................................................... 92
Table 7-2. ID Code Structure..................................................................................................................................... 93
Table 7-3. Device ID Codes....................................................................................................................................... 93
Table 8-1. DC Pin Logic Levels ................................................................................................................................. 94
Table 8-2. Pin Capacitance ....................................................................................................................................... 94
Table 8-3. Supply Current and Output Voltage ......................................................................................................... 94
Table 9-1. Transmitter Characteristics....................................................................................................................... 95
Table 9-2. Receiver Characteristics........................................................................................................................... 95
Table 9-3. Intel Read Mode Characteristics .............................................................................................................. 96
Table 9-4. Intel Write Cycle Characteristics .............................................................................................................. 99
Table 9-5. Motorola Read Cycle Characteristics ..................................................................................................... 102
Table 9-6. Motorola Write Cycle Characteristics ..................................................................................................... 105
Table 9-7. Serial Port Timing Characteristics .......................................................................................................... 108
Table 9-8. Transmitter System Timing..................................................................................................................... 109
Table 9-9. Receiver System Timing......................................................................................................................... 109
Table 9-10. JTAG Timing Characteristics................................................................................................................ 111
Table 12-1. Thermal Characteristics........................................................................................................................ 114
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
1 STANDARDS COMPLIANCE
1.1
Telecom Specifications compliance
The DS26334 LIU meets all the relevant latest Telecommunications Specifications. The following provides the T1
and E1 Specifications and relevant sections that are applicable to the DS26334.
·
T1-Related Telecommunications Specifications
· ANSI T1.102- Digital Hierarchy Electrical Interface
· ANSI T1.231- Digital Hierarchy- Layer 1 in Service Performance Monitoring
· ANSI T1.403- Network and Customer Installation Interface- DS1 Electrical Interface
· G.736 Characteristics of a synchronous digital multiplex equipment operating at 2048 kbit/s
· G.823 The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy
· Pub 62411 High Capacity Terrestrial Digital Service
· ITUT G.772 Protected monitoring points provided on digital transmission systems
·
E1-Related Telecommunications Specifications
· ITUT G.703 Physical/Electrical Characteristics of G.703 Hierarchical Digital Interfaces
· ITUT G.736 Characteristics of Synchronous Digital Multiplex Equipment operating at 2048 Kbit/s
· ITUT G.742 Second Order Digital Multiplex Equipment Operating at 8448 Kbit/s
· ITUT G.772 Protected monitoring points provided on digital transmission systems
· ITUT G.775 Loss of signal (LOS) and alarm indication signal (AIS) defect detection and clearance criteria
· ETSI 300 166 Physical and electrical characteristics of hierarchical digital interfaces for equipment using
the 2,048 kbit/s-based plesiosynchronous or synchronous digital hierarchies
· ETSI 300 233 Integrated Services Digital Network (ISDN)
· G.736 Characteristics of a synchronous digital multiplex equipment operating at 2048 kbit/s
· G.823 The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy
· Pub 62411 High Capacity Terrestrial Digital Service
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
2 DETAILED DESCRIPTION
The DS26334 is a single-chip, 16-channel, long-haul and short-haul line interface unit for T1 (1.544Mbps) and E1
(2.048Mbps) applications. Sixteen independent receivers and transmitters are provided in a single TEBGA
package. The LIUs can be individually selected for T1, J1, or E1 operation. The LIU requires a single master
reference clock. This clock can be either 1.544MHz or 2.048MHz or multiples thereof, and either frequency can be
internally adapted for T1, J1, or E1 mode. Internal impedance matching provided for both transmit and receive
paths reduces external component count. The transmit waveforms are compliant to G.703 and T1.102
specification. The DS26324 provides software-selectable internal transmit termination for 100W T1 twisted pair,
110W J1 twisted pair, 120W E1 twisted pair, and 75W E1 coaxial applications. The transmitters have fast highimpedance capability and can be individually powered down.
The receivers can function with up to a receive signal attenuation of 36dB for T1 mode, or 43dB for E1 mode. A
monitor gain setting also can be enabled to provide 14dB, 20dB, 26dB, and 32dB of resistive gain. The DS26334
can be configured as a 14-channel LIU with channel 1 and 9 used for nonintrusive monitoring in accordance with
G.772. The receivers and transmitters can be programmed into single or dual-rail mode. AMI or HDB3/B8ZS
encoding and decoding is selectable in single-rail mode. A 128-bit crystal-less on-board jitter attenuator for each
LIU can be placed in receive or transmit directions. The jitter attenuator meets the ETSI CTR12/13 ITU G.736,
G.742, G.823, and AT&T PUB62411 specifications.
The DS26334 detects and generates AIS in accordance with T1.231, G.775, and ETSI 300233. Loss of signal is
detected in accordance with T1.231, G.775, and ETSI 300233. The DS26334 can perform digital, analog, remote,
and dual loopbacks on individual LIUs. JTAG boundary scan is provided for the digital pins.
The DS26334 can be configured using 8-bit multiplexed or nonmultiplexed Intel or Motorola ports. A 4-pin serial
port selection is also available for configuration and monitoring of the device. .
The analog AMI/HDB3 waveform of the E1 line or the AMI/B8ZS waveform of the T1 line is transformer coupled
into the RTIP and RRING pins of the DS26334. The user has the option to select internal impedance matching to
75W, 100W, 110W, or 120W with the use of a single external resistor. The device recovers clock and data from the
analog signal and passes it through a selectable jitter attenuator outputting the received line clock at RCLK and
data at RPOS and RNEG.
The DS26334 receivers can recover data and clock for up to 36dB of attenuation of the transmitted signals in T1
mode and 43dB for E1 mode. Receiver 1 can monitor the performance of receivers 2 to 8 or transmitters 2 to 8.
Receiver 9 can monitor the performance of receivers 10 to 16 or transmitters 10 to 16.
The DS26334 contains 16 identical transmitters. Digital transmit data is input at TPOS/TNEG with reference to
TCLK. The data at these pins can be single rail or dual rail. This data is processed by waveshaping circuitry and
the line driver to output at TTIP and TRING in accordance with ANSI T1.102 for T1/J1 or G.703 for E1 mask.
The DS26334 drives the E1 or T1 line from the TTIP and TRING pins by a 1:2 coupling transformer. The DS26334
supports the use of either a 1:1 or a 1:2 transformer on the receive side through the receiver turns ratio (RTR) bit.
For long-haul applications, a 1:1 transformer is preferred. Receive internal impedance matching allows one
external resistance value to work for all T1/J1/E1 modes.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
3 BLOCK DIAGRAMS
Figure 3-1. Block Diagram
TYPICAL OF ALL 16 CHANNELS
T1CLK E1CLK
DS26334
MUX
VCO/PLL
LOS
RPOS/RDAT
TTIP
Remote Loopback
RNEG/CV
TPOS/TDAT
Wave Shaping
CSU Filters
Line Drivers
TRING
Jitter Attenuator
Unframed All
Ones Insertion
RCLK
Receive Logic
Local Loopback
Remote Loopback (Dual Mode)
Clock/Data
Recovery
Peak Detector
Analog Loopback
RTIP
Filter
Optional
Termination
RRING
Transmit Logic
TCLK
TNEG
OE
Reset
T1CLK
E1CLK
16
Control
and
Interrupt
Port Interface
Master Clock
Adapter
JTAG PORT
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MCLK
TDI
TDO
TCLK
TMS
TRSTB
INTB
MODESEL
8
CSB
A0 to A4
A5/BSWB
ASB/ALE/SCLK
MOTEL
RDY/ACKB/SDO
RDB/RWB
CLKE
WRB/DSB/SDI
RSTB
5
D0 to D7/
AD0 to AD7
Reset
16
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
LOS
EZDE
Figure 3-2. Receive Logic Detail
RCLK
RCLK
Excessive
Zero
Detect
T1.231
IAISEL
POS
AISEL
NEG
EN
RPOS
NRZ Data
All Ones
Insert
(AIS)
RNEG/CV
ENCV
BPV/CV/EXZ
MCLK
LASCS
SRMS
AIS
Detector
G.775, ETSI 300233,
T1.231
CVDEB
ENCODE
LCS
CODE
ENCODE
B8ZS/HDB3/AMI
Decoder (G.703, T1.102)
BPVs, Code Violatiions
(T1.231, O.161)
MUX
BEIR
ENCODE
SRMS
LCS
CODE
Figure 3-3. Transmit Logic Detail
B8ZS/HDB3/AMI
Coder (G.703,
T1.102)
To Remote
Loopback
BPV
Insert
MUX
TPOS/
TDATA
TNEG/
BPV
TCLK
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
4 PIN DESCRIPTION
Table 4-1. Pin Descriptions
NAME
PIN
TYPE
FUNCTION
ANALOG TRANSMIT AND RECEIVE
TTIP1
TTIP2
TTIP3
TTIP4
TTIP5
TTIP6
TTIP7
TTIP8
TTIP9
TTIP10
TTIP11
TTIP12
TTIP13
TTIP14
TTIP15
TTIP16
TRING1
TRING2
TRING3
TRING4
TRING5
TRING6
TRING7
TRING8
TRING9
TRING10
TRING11
TRING12
TRING13
TRING14
TRING15
TRING16
RTIP1
RTIP2
RTIP3
RTIP4
RTIP5
RTIP6
RTIP7
RTIP8
RTIP9
RTIP10
RTIP11
RTIP12
RTIP13
RTIP14
RTIP15
RTIP16
E1
F1
K1
L1
T5
T6
T10
T11
M16
L16
G16
F16
A12
A11
A7
A6
E2
F2
K2
L2
R5
R6
R10
R11
M15
L15
G15
F15
B12
B11
B7
B6
A1
C1
H1
N1
T1
T3
T8
T13
T16
P16
J16
D16
A16
A14
A9
A4
Analog
output
Transmit Bipolar Tip for Channels 1–16. These pins are differential
line driver tip outputs. These pins can be high impedance if pin OE is
low. When “1” is set in the Output Enable Register OE bit, the
associated TTIPn pin will be enabled when the OE pin is high. The
differential outputs of TTIPn and TRINGn can provide internal
matched impedance for E1 75W, E1 120W, T1 100W, or J1 110W.
If the TCLK input for a given LIU is held low for 64 MCLKs, that LIUs
transmitter is powered down and the TTIP/TRING outputs are high
impedance.
Analog
output
Transmit Bipolar Ring for Channels 1–16. These pins are
differential line driver ring outputs. These pins can be high impedance
if pin OE is low. When “1” is set in the Output Enable Register OE bit,
the associated TRINGn pin will be enabled when the OE pin is high.
The differential outputs of TTIPn and TRINGn can provide internal
matched impedance for E1 75W, E1 120W, T1 100W, or J1 110W.
If the TCLK input for a given LIU is held low for 64 MCLKs, that LIUs
transmitter is powered down and the TTIP/TRING outputs are high
impedance.
Analog
input
Receive Bipolar Tip for Channels 1–16. Receive analog input for
differential receiver. Data and clock are recovered and output at
RPOS/RNEG and RCLK pins respectively. The differential inputs of
RTIPn and RRINGn can provide internal impedance matching with
external resistance for E1 75W, E1 120W, T1 100W, or J1 110W.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
RRING1
RRING2
RRING3
RRING4
RRING5
RRING6
RRING7
RRING8
RRING9
RRING10
RRING11
RRING12
RRING13
RRING14
RRING15
RRING16
A2
C2
H2
N2
R1
R3
R8
R13
T15
P15
J15
D15
B16
B14
B9
B4
TYPE
Analog
input
FUNCTION
Receive Bipolar Ring for Channels 1–16. Receive analog input for
differential receiver. Data and clock are recovered and output at
RPOS/RNEG and RCLK pins respectively. The differential inputs of
RTIPn and RRINGn can provide internal impedance matching with
external resistance for E1 75W, E1 120W, T1 100W, or J1 110W.
DIGITAL Tx/Rx
TPOS1/TDATA1
TPOS2/TDATA2
TPOS3/TDATA3
TPOS4/TDATA4
TPOS5/TDATA5
TPOS6/TDATA6
TPOS7/TDATA7
TPOS8/TDATA8
TPOS9/TDATA9
TPOS10/TDATA10
TPOS11/TDATA11
TPOS12/TDATA12
TPOS13/TDATA13
TPOS14/TDATA14
TPOS15/TDATA15
TPOS16/TDATA16
TNEG1
TNEG2
TNEG3
TNEG4
TNEG5
TNEG6
TNEG7
TNEG8
TNEG9
TNEG10
TNEG11
TNEG12
TNEG13
TNEG14
TNEG15
TNEG16
F6
G7
J6
K6
L9
N5
P12
M11
L11
J11
G11
C14
F9
E7
N12
D5
C3
J14
J5
G10
M6
P6
P7
K9
L12
J12
H11
E13
G8
F7
C6
C5
Transmit Positive Data Input for Channels 1–6. When DS26334 is
configured in dual-rail mode, the data input to TPOSn is output as a
positive pulse on the line (tip and ring).
I
Transmit Data Input for Channels 1–16. When the device is
configured in single-rail mode NRZ data is input to TDATAn. The data
is sampled on the falling edge of TCLKn and encoded HDB3/B8ZS or
AMI before being output to the line.
Transmit Negative Data for Channels 1–16. When DS26334 is
configured in dual-rail mode. The data input to TNEGn is output as a
negative Mark on the line. TPOS and TNEG in dual-rail mode result in
positive and negative pulses sent on the line:
I
TPOSn
0
0
1
1
11 of 115
TNEGn
0
1
0
1
OUTPUT PULSE
Space
Negative mark
Positive mark
Space
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
TCLK1
TCLK2
TCLK3
TCLK4
TCLK5
TCLK6
TCLK7
TCLK8
TCLK9
TCLK10
TCLK11
TCLK12
TCLK13
TCLK14
TCLK15
TCLK16
RPOS1/RDATA1
RPOS2/RDATA2
RPOS3/RDATA3
RPOS4/RDATA4
RPOS5/RDATA5
RPOS6/RDATA6
RPOS7/RDATA7
RPOS8/RDATA8
RPOS9/RDATA9
RPOS10/RDATA10
RPOS11/RDATA11
RPOS12/RDATA12
RPOS13/RDATA13
RPOS14/RDATA14
RPOS15/RDATA15
RPOS16/RDATA16
RNEG1/CV1
RNEG2/CV2
RNEG3/CV3
RNEG4/CV4
RNEG5/CV5
RNEG6/CV6
RNEG7/CV7
RNEG8/CV8
RNEG9/CV9
RNEG10/CV10
RNEG11/CV11
RNEG12/CV12
RNEG13/CV13
RNEG14/CV14
RNEG15/CV15
RNEG16/CV16
F5
G4
G9
H6
M7
L8
L10
P9
K11
K12
F14
E12
C11
D12
N7
D11
F4
F3
L3
L4
K8
M9
P8
M12
M14
K13
G12
E14
C12
C10
C8
E5
E3
G5
K4
M3
L7
M10
P11
K10
M13
L14
F13
F11
E10
C9
C7
J3
TYPE
FUNCTION
Transmit Clock for Channels 1–16. The transmit clock has to be
1.544MHz for T1 or 2.048MHz for E1 mode. TCLKn is the clock used
to sample the data TPOS/TNEG or TDAT on the falling edge. The
expected TCLK can be inverted.
I
If TCLKn is ‘high’ for 16 or more MCLKs, then transmit all ones
(TAOs) is sent to the line side of the corresponding transmit channel.
When TCLKn starts clocking again, normal operation will begin again
for the corresponding transmit channel.
If TCLKn is ‘low’ for 64 or more MCLKs, then the corresponding
transmit channel on the line side will power-down and be put into high
impedance. When TCLKn starts clocking again the corresponding
transmit channel will power-up and come out of high impedance.
O,
tri-state
Receive Positive Data Output for Channels 1–16. In dual-rail mode
the NRZ data output indicates a positive pulse on RTIP/RRING. Upon
detecting a LOS, AIS can be inserted if AISEL bit in the GC(0F) is set
otherwise the pins will be active. AIS insertion can also be controlled
on an individual LIU basis by IAISEL(05) register. If a given receiver is
in power-down mode the associated RPOS pin is high impedance.
Receive Data Output for Channels 1–16. In single-rail mode, NRZ
data is sent out on this pin. If a given receiver is in power-down mode
the associated RPOS pin is high impedance.
Note: During an LOS condition, the RPOS/RDATA outputs remain
active.
O,
tri-state
Receive Negative Data Output for Channels 1–16. In dual-rail
mode the NRZ data output indicates a negative pulse on
RTIP/RRING. Upon detecting a LOS, AIS can be inserted if AISEL bit
in the GC is set otherwise the pins will be active. AIS insertion can
also be controlled on an individual LIU basis by IAISEL register. If a
given receiver is in power-down mode, the associated RNEG pin is
high impedance.
Code Violation for Channels 1–16. In single-rail mode, bipolar
violation, code violation, and excessive zeros are reported on CVn. If
HDB3 or B8ZS is not selected, this pin indicates only BPVs. If a given
receiver is in power-down mode, the associated CV pin is high
impedance.
12 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
RCLK1
RCLK2
RCLK3
RCLK4
RCLK5
RCLK6
RCLK7
RCLK8
RCLK9
RCLK10
RCLK11
RCLK12
RCLK13
RCLK14
RCLK15
RCLK16
D3
G6
K3
K5
P5
M8
P10
P13
L13
K14
G13
F12
E8
E9
F8
E6
MCLK
H12
LOS1
LOS2
LOS3
LOS4
LOS5
LOS6
LOS7
LOS8
LOS9
LOS10
LOS11
LOS12
LOS13
LOS14
LOS15/TECLK
LOS16/CLKA
D2
G2
J2
M2
R2
T2
R4
R7
R14
N15
K15
H15
B10
B8
E11
F10
TYPE
FUNCTION
O,
tri-state
Receive Clock for Channels 1–16. The receive data (RPOS/RNEG)
is clocked out on the rising edge of RCLK. If a given receiver is in
power-down mode the RCLK is high impedance. Upon a LOS being
detected, the RCLK is switched from the recovered clock to MCLK.
RCLK can be inverted by the RCLKI register.
I
Master Clock. This is an independent free-running clock that can be
a multiple of 2.048MHz ±50ppm for E1 mode or 1.544MHz ±50ppm
for T1 mode. The clock selection is available by MC bits MPS0,
MPS1, FREQS, and PLLE. A multiple of 2.048MHz can be internal
adapted to 1.544MHz and a multiple of 1.544MHz can be internal
adapted to 2.048MHz.
Loss-of-Signal Output. This output goes high when there is no
transition on the received signal over a specified interval. The output
will go low when there is sufficient ones density in the received signal.
The LOS criteria for assertion and desertion criteria are described in
Section 5.5.5. The LOS outputs can be configured to comply with
T1.231, ITU G.775 or ETSI 300 233.
O
T1/E1 Clock (TECLK) (Ball E11 only). This output becomes a T1 or
E1 programmable clock output when enabled by register MC. For T1
or E1 frequency selection see register CCR.
Clock A (CLKA) (Ball F10 only). This output becomes a
programmable clock output when enabled by register MC. For
frequency options see register CCR.
HOST SELECTION
MODESEL
A3
I
MOTEL
B3
I
CSB
P14
I
Mode Selection. This pin is used to select the control mode of the
DS26334:
Low ® serial host mode
High ® parallel host mode
Motorola Intel Select. When this pin is low, Motorola mode is
selected. When this pin is high Intel mode is selected.
Chip Select Bar. This signal must be low during all accesses to the
registers.
13 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
TYPE
FUNCTION
Shift Clock. In the serial host mode, this pin is the serial clock. Data
on SDI is clocked on the rising edge of SCLK. The data is clocked on
SDO on the rising edge of SCLK if CLKE is high. If CLKE is low the
data on SDO is clocked on the falling edge of SCLK.
SCLK/ALE/ASB
N14
I
Address Latch Enable. In parallel Intel multiplexed mode, the
address lines are latched on the falling edge of ALE.
Address Strobe Bar. In parallel Motorola multiplexed mode, the
address is sampled on the falling edge of ASB.
Note: Tie ALE/ASB pin high if using nonmuxed mode.
Read Bar. Intel host mode, this pin must be low for read operation.
RDB/RWB
H14
I
Read Write Bar. In Motorola mode, this pin is low for write operation
and high for read operation.
Serial Data Input. In the serial host mode, this pin is the serial input
SDI; it is sampled on the rising edge of SCLK.
SDI/WRB/DSB
G14
I
Write Bar. In Intel host mode, this pin is active low during write
operation. The data or address (multiplexed mode) is sampled on the
rising edge of WRB.
Data Strobe Bar. In the parallel Motorola mode, this pin is active low.
During a write operation the data or address is sampled on the rising
edge of DSB. During a read operation the data or address is driven
on the rising edge of DSB. In the nonmultiplexed Motorola mode the
address bus (A [5:0]) is latched on the falling edge of DSB.
Serial Data Out. In serial host mode, the SDO data is output on this
pin. If a serial write is in progress this pin is high impedance. During a
read SDO is high impedance when the SDI is in command/address
mode. If CLKE is low SDO is output on the rising edge of SCLK, if
CLKE is high on the falling edge.
SD0/RDYB/ACKB
C13
O
Ready Bar Output. A high on this pin reports to the host that the
cycle is not complete and wait states must be inserted. A low means
the cycle is complete.
Acknowledge Bar. In Motorola parallel mode, a low on this pin
indicates that the read data is available for the Host or that the written
data cycle is complete.
INTB
D7
O,
open
drain
Interrupt Bar (Active Low). This signal is tri-state when RST pin is
low. This interrupt signal is driven low when an event is detected on
any of the enabled interrupt sources in any of the register banks.
When there are no active and enabled interrupt sources, the pin can
be programmed to either drive high or as open drain. The reset
default is open drain when there are no active enabled interrupt
sources. All interrupt sources are disabled when RST = 0 and they
must be programmed to be enabled.
14 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
D7/AD7
D6/AD6
D5/AD5
D4/AD4
D3/AD3
D2/AD2
D1/AD1
D0/AD0
N3
P3
M4
L5
K7
P4
M5
L6
TYPE
FUNCTION
Data Bus 7–0. In nonmultiplexed host mode, these pins are the
bidirectional data bus.
I/O,
tri-state
Address/Data Bus 7–0. In multiplexed host mode, these pins are the
bidirectional address/data bus. Note: AD7 and AD6 do not carry
address information.
In serial host mode, these pins should be grounded.
Address 5. In the host nonmultiplexed mode, this is the most
significant bit of the address bus.
A5/BSWP
E4
I
Bit Swap. In serial host mode, this bit defines the serial data position
to be MSB first when low and LSB first when high.
In multiplexed host mode, this pin should be grounded.
A4
A3
A2
A1
A0
OE
C4
H5
G3
H3
N10
R12
I
I
Address Bus 4–0. These five pins are address pins in the parallel
host mode.
In serial host mode and multiplexed host mode, these pins should be
grounded.
Output Enable. If this pin is pulled low all the transmitters outputs
(TTIP and TRING) are high impedance. If pulled high all the
transmitters are enabled when the associated Output Enable OE bit is
set.
If GC.RTCTL is set, the OE pin is granted control of the receiver
internal termination. When OE is low, receiver internal termination will
be high impedance. When OE is high, receiver termination will be
enabled. The receiver can still monitor incoming signals even when
termination is in high impedance.
Clock Edge. If CLKE is high, SDO is clocked out on falling edge of
SCLK and if low SDO is on rising edge of SCLK.
CLKE/MUX
T14
I
Multiplexed/Nonmultiplexed Select Pin. When in parallel port
mode, this pin is used to select multiplexed address and data
operation or separate address and data. When mux is a high
multiplexed address and data is used and when mux is low
nonmultiplexed is used.
JTAG
TRSTB
E15
I,
pullup
TMS
B13
I,
pullup
TCK
D14
I
TDO
A15
O,
high-Z
TDI
B15
I,
pullup
JTAG Test Port Reset. This pin if low will reset the JTAG port. If not
used it can be left floating.
JTAG Test Mode Select. This pin is clocked on the rising edge of
TCK and is used to control the JTAG selection between scan and
Test Machine control.
JTAG Test Clock. The data TDI and TMS are clocked on rising edge
of TCK and TDO is clocked out on the falling edge of TCK.
JTAG Test Data Out. This is the serial output of the JTAG port. The
data is clocked out on the falling edge of TCK.
Test Data Input. This pin input is the serial data of the JTAG Test.
The data on TDI is clocked on the rising edge of TCK. This pin can be
left unconnected.
15 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
TYPE
FUNCTION
RESET
RSTB
B5
I,
pullup
Reset Bar. This is the asynchronous reset input bar. It is internally
pulled high. A 1ms low on this pin will reset the DS26334 registers to
default value.
POWER SUPPLIES
DVDD
DVSS
VDDT1
VDDT2
VDDT3
VDDT4
VDDT5
VDDT6
VDDT7
VDDT8
VDDT9
VDDT10
VDDT11
VDDT12
VDDT13
VDDT14
VDDT15
VDDT16
GNDT1
GNDT2
GNDT3
GNDT4
GNDT5
GNDT6
GNDT7
GNDT8
GNDT9
GNDT10
GNDT11
GNDT12
GNDT13
GNDT14
GNDT15
GNDT16
AVDD
H8,
J9
H9,
J8,
R9
D1
G1
J1
M1
T4
T7
T9
T12
N16
K16
H16
E16
A13
A10
A8
A5
D4
H4
J4
N4
N6
N8
N9
N11
N13
J13
H13
D13
D10
D9
D8
D6
B1,
C16,
P1,
R16,
H7,
J10
I
3.3V Digital Power Supply
I
Digital Ground
I,
high-Z
3.3V Power Supply for the Transmitter. All VDDT pins must be
connected to VDDT, which has to be 3.3V.
I
Analog Ground for Transmitters
I
3.3V Analog Core Power Supply. Decouple each pin separately.
16 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN
TYPE
AVSS
B2,
C15,
P2,
R15,
H10,
J7
I
FUNCTION
Analog Core Ground
17 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5 FUNCTIONAL DESCRIPTION
5.1
5.1.1
Port Operation
Serial Port Operation
Setting MODESEL = ‘low’ enables the serial bus interface on the DS26334. Port read/write timing is unrelated to
the system transmit and receive timing, allowing asynchronous reads or writes by the host. See Section 9.3 for the
AC timing of the serial port. All serial port accesses are LSB first when BSWP pin is high and MSB first when
BSWP is low. Figure 5-1 to Figure 5-3 show operation with LSB first.
This port is compatible with the SPI interface defined for Motorola Processors. An example of this is the MMC2107
from Motorola.
Reading or writing to the internal registers requires writing one address/command byte prior to transferring register
data. The first bit written (LSB) of the address/command byte specifies whether the access is a read (1) or a write
(0). The next 6 bits identify the register address (A1 to A6) (A7 is ignored).
All data transfers are initiated by driving the CSB input low. When CLKE is low, SDO data is output on the rising
edge of SCLK and when CLKE is high, data is output on the falling edge of SCLK. Data is held until the next falling
or rising edge. All data transfers are terminated if CSB input transitions high. Port control logic is disabled and SDO
is tri-stated when CSB is high. SDI is always sampled on the rising edge of SCLK.
Figure 5-1. Serial Port Operation for Write Access
SCLK 1
2
3
4
5
6
7
A1
A2
A3
A4
A5
A
6
8
9
10
11
12
13
14
15
D4
D5
D6
16
CSB
SDI
0
(lsb)
x
DO
(adrs
msb)
(lsb)
D1
D2
D3
D7
(msb)
WRITE ACCESS ENABLED
SDO
Figure 5-2. Serial Port Operation for Read Access with CLKE = 0
1
SCLK
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CSB
SDI
A1
0
(lsb)
SDO
A2
A3
A4
A5
A6
X
(msb)
D0
Read
Access
Enabled
(lsb)
18 of 115
D1
D2
D3
D4
D5
D6
D7
(msb)
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-3. Serial Port Operation for Read Access with CLKE = 1
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CSB
SDI
0
SDO
A1
A2
A3
A4
A5
X
A6
(msb)
(lsb)
D0
D1
D2
(lsb)
5.1.2
D3
D4
D5
D6
D7
(msb)
Parallel Port Operation
When using the parallel interface on the DS26334 the user has the option for either multiplexed bus operation or
nonmultiplexed bus operation. The ALE pin is pulled high in nonmultiplexed bus operation. The DS26334 can
operate with either Intel or Motorola bus-timing configurations selected by MOTEL pin. This pin being high selects
the Intel mode. The parallel port is only operational if MODESEL pin is pulled high. The following Table lists all the
pins and their functions in the parallel port mode. See the timing diagrams in Section 9 for more details.
Table 5-1. Parallel Port Mode Selection and Pin Functions
MODESEL, MOTEL,
MUX
100
110
101
111
5.1.3
PARALLEL HOST
INTERFACE
Nonmultiplexed Motorola
Nonmultiplexed Intel
Multiplexed Motorola
Multiplexed Intel
ADDRESS, DATA, AND CONTROL
CSB, ACKB, DSB, RWB, ASB, A [5:0], D [7:0], INTB
CSB, RDYB, WRB, RDB, ALE, A [5:0], D [7:0], INTB
CSB, ACKB, DSB, RWB, ASB, AD [7:0], INTB
CSB, RDYB, WRB, RDB, ALE, AD [7:0], INTB
Interrupt Handling
There are four sets of events that can potentially trigger an Interrupt. The interrupt functions as follows:
·
·
·
When status changes on an interruptible event, INTB pin will go low if the event is enabled through the
corresponding Interrupt Enable Register. The INTB has to be pulled high externally with a 10kW resister for
wired-OR operation. If a wired-OR operation is not required, the INTB pin can be configured to be high when
not active by setting register GISC.INTM.
When an Interrupt occurs the Host Processor has to read the Interrupt Status register to determine the source
of the Interrupt. The read will also clear the Interrupt Status register and this will clear the output INTB pin. The
Interrupt Status register can also be configured as clear on write as per register GISC.CWE. When set to clear
on write, and interrupt status register bit (and the interrupt it generates) will only be cleared on writing a ‘1’ to
it’s bit location in the interrupt status register. This makes is possible to clear interrupts on some bits in a
register without clearing them on all bits.
Subsequently the host processor can read the corresponding Status Register to check the real-time status of
the event.
19 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-4. Interrupt Handling Flow Diagram
Interrupt Allowed
No
Interrupt Conditon
Exist?
Yes
Read Interrupt Status
Register
Read Corresponding Status
Register (Optional)
Service the Interrupt
5.2
Power-Up and Reset
Internal Power_On_Reset circuitry generates a reset during power-up. All Registers are reset to the default values.
Writing to the Software Reset Register generates at least 1ms reset cycle, which has the same effect as the powerup reset.
The DS26334 can be reset by a low going pulse on the RSTB pin (see Table 4-1). A reset can also be performed in
software by writing any value to the SWR register.
5.3
Master Clock
The DS26334 requires 2.048MHz ±50ppm or 1.544MHz ±50ppm or multiple thereof. The receiver uses the MCLK
as a reference for clock recovery, jitter attenuation and generating RCLK during LOS. The AIS Transmission uses
MCLK for Transmit All Ones Condition. See register MC to set desired incoming frequency. When the PLLE bit is
set, the master clock adapter will generate both 2.048MHz (E1) and 1.544MHz (T1) clocks. If the PLLE bit is clear,
both internal reference clocks will track MCLK.
MCLK or RCLK can also be used to output CLKA on the LOS16 pin. Register CCR is used to select the clock
generated for CLKA and the TECLK. Any RCLK can also be selected as an input to the clock generator using this
same register. For a detailed description of selections available see Figure 5-5.
20 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-5. Pre-Scaler PLL and Clock Generator
PCLKS2..0
RLCK1..8
CLKA3..0
PLLE
RLOS16
T1CLK
MPS1..0
MCLK
PCLKI1..0
CLKAE
FREQS
CLK
GEN
Pre
Scaler
PLL
LOS16
CLKA
E1CLK
TECLK
LOS15
PLLE
TECLKS
TECLKE
RLCK9..16
RLOS15
PCLKS2..0
5.4
Transmitter
NRZ data arrives on TPOS and TNEG on the Transmit System Side. The TPOS and TNEG data is sampled on the
falling edge of TCLK.
The data is encoded with HDB3 or B8ZS or NRZ encoding when single-rail mode is selected (only TPOS as the
data source). When in single-rail mode only, BPV errors can be inserted for test purposes by register BEIR. Preencoded data is expected when dual-rail mode is selected. The encoded data passes through a jitter attenuator if it
is enabled for the Transmit path. A digital sequencer and DAC are used to generate Transmit waveforms compliant
with T1.102 and G.703 Pulse Masks.
The line driver supports internal impedance matching for 75W, 100W, 110W, and 120W modes.
The DS26334 drivers have short and open circuit driver fail monitor detection. There is an OE pin that can high
impedance the transmitter outputs for Protection Switching when low. The individual transmitters are by default in
high impedance. Register OE is used to enable the transmitters individually when the OE pin is high. The DS26334
has to have the transmitter’s enabled by setting the register and then pulling the OE pin high. The registers that
control the Transmitter operation are shown in Table 5-2.
21 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 5-2. Telecommunications Specification Compliance for DS26334 Transmitters
TRANSMITTER FUNCTION
TELECOMMUNICATIONS COMPLIANCE
AMI Coding, B8ZS Substitution, DS1 Electrical Interface
T1 Telecom Pulse Mask compliance
T1 Telecom Pulse Mask compliance
Transmit Electrical Characteristics for E1 Transmission
and Return Loss Compliance
ANSI T1.102
ANSI T1.403
ANSI T1.102
ITUT G.703.
Table 5-3. Registers Related to Control of DS26334 Transmitters
REGISTER NAME
Transmit All Ones Enable
Driver Fault Monitor Status
Driver Fault Monitor Interrupt Enable
Driver Fault Monitor Interrupt Status
Automatic Transmit All Ones Select
ACRONYM
TAOE
DFMS
DFMIE
DFMIS
ATAOS
Global Configuration Register
GC
Template Select Transmitter
TST
Template Select
TS
Output Enable Configuration
Register
OE
Master Clock Selection
MC
Transmit Single-Rail Mode Select
Register
Line Code Selection
Transmit Power-Down
Individual Jitter Attenuator Enable
Individual Jitter Attenuator Position
Select
Individual Jitter Attenuator FIFO
Depth Select
Individual Jitter Attenuator FIFO
Limit Trip
Individual Short-Circuit Protection
Disable
Short-Haul/Long-Haul Select
SRMS
LCS
TPDE
IJAE
IJAPS
IJAFDS
IJAFLT
ISCPD
SHLHS
BERT Control Register
BTCR
Transmit clock Invert
TCLKI
BPV Error insertion
BEIR
FUNCTION
Transmit All Ones Enable
Driver Fault Status
Driver Fault Status Interrupt Mask
Driver Fault Status Interrupt Mask
Transmit all ones enabled automatically on LOS
Global control of Jitter Attenuator, line coding and short
circuit protection.
The Transmitter that the Template Select Register
Applies to.
The TS2 to TS0 bits for Selection of the Templates for
Transmitter and TIMPOFF and TIMPRIM bits to control
transmit impedance match
These register bits can be used to enable the Transmitter
outputs
Selects the MCLK frequency used for transmit and
receive.
This register can be used to select between single-rail
and dual-rail mode.
The individual Transceiver Line Codes can be selected to
overwrite the global setting.
Individual Transmitters can be powered down.
Enables the jitter attenuator
Selects whether jitter attenuator is in transmit or receive
path
Selects depth of jitter attenuator FIFO.
Indicates jitter attenuator FIFO within 4 bits of its useful
limit
This register allows the individual Transmitters to have
Short Circuit Protection Disable.
This selects between short-haul and long-haul templates.
This register allows mapping of the internal BERTs into
an individual transmit path.
Inverts TCLK input.
Inserts a bipolar error in the transmit path when in singlerail mode.
22 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.4.1
Transmit Line Templates
The DS26334 transmitters can be selected individually to meet the pulse masks for E1 and T1/J1 mode. The T1/J1
pulse mask is shown in the Transmit Pulse Template and can be configured on an individual LIU basis. The
transmit template is selected via the TS2-TS0 bits in the TS register. Transmit impedance matching is selected
using the TIMPOFF and the TIMPRM bits of the same register. When transmit impedance matching is enabled
TIMPRM will select between 75W and 120W impedance if an E1 template is selected, and between 100W and
110W impedance if a T1/J1 template is selected. In E1 mode, if 75W is selected via the TIMPRM bit, the output
pulse amplitude will be 2.37V, if 120W is selected via the TIMPRIM bit, the output pulse amplitude will be 3.0V.
The E1 pulse template is shown in Figure 5-7 and the T1 pulse template is shown in Figure 5-6.
Table 5-4. Template Selections for Short-Haul Mode
TS2, TS1, TS0
000
001
010
011
100
101
110
111
APPLICATION
E1
Reserved
DSX-1 (0–133ft)
DSX-1 (133–266ft)
DSX-1 (266–399ft)
DSX-1 (399–533ft)
DSX-1 (533–655ft)
Table 5-5. Template Selections for Long-Haul Mode
TS2, TS1, TS0
000
001
010
011
100
101
110
APPLICATION
E1
Reserved
0dB CSU
-7.5dB CSU
-15dB CSU
-22dB CSU
23 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-6. T1 Transmit Pulse Templates
1 .2
1 .1
1 .0
0 .9
0 .8
NORMALIZEDAMPLITUDE
0 .7
0 .6
0 .5
0 .4
0 .3
0 .2
0 .1
0
-0 .1
T 1 .1 0 2 / 8 7 , T 1 .4 0 3 ,
C B 1 1 9 (O c t. 7 9 ), &
I.4 3 1 T e m p la te
-0 .2
-0 .3
-0 .4
-0 .5
-5 0 0
-4 0 0
-3 0 0
-2 0 0
-1 0 0
0
D S X -1 T e m p la te (p e r A N S I T 1 .1 0 2 -1 9 9 3 )
M A X IM U M C U R V E
UI
T im e
Am p.
- 0 .7 7
- 0 .3 9
- 0 .2 7
- 0 .2 7
- 0 .1 2
0 .0 0
0 .2 7
0 .3 5
0 .9 3
1 .1 6
-5 0 0
-2 5 5
-1 7 5
-1 7 5
-7 5
0
175
225
600
750
0 .0 5
0 .0 5
0 .8 0
1 .1 5
1 .1 5
1 .0 5
1 .0 5
- 0 .0 7
0 .0 5
0 .0 5
M IN IM U M C U R V E
UI
T im e
Am p.
- 0 .7 7
- 0 .2 3
- 0 .2 3
- 0 .1 5
0 .0 0
0 .1 5
0 .2 3
0 .2 3
0 .4 6
0 .6 6
0 .9 3
1 .1 6
-5 0 0
-1 5 0
-1 5 0
-1 0 0
0
100
150
150
300
430
600
750
- 0 .0 5
- 0 .0 5
0 .5 0
0 .9 5
0 .9 5
0 .9 0
0 .5 0
- 0 .4 5
- 0 .4 5
- 0 .2 0
- 0 .0 5
- 0 .0 5
100
200
T IM E (n s )
300
400
500
600
D S 1 T e m p l a t e ( p e r A N S I T 1 .4 0 3 - 1 9 9 5 )
M A X IM U M C U R V E
UI
T im e
Am p.
- 0 .7 7
- 0 .3 9
- 0 .2 7
- 0 .2 7
- 0 .1 2
0 .0 0
0 .2 7
0 .3 4
0 .7 7
1 .1 6
24 of 115
-5 0 0
-2 5 5
-1 7 5
-1 7 5
-7 5
0
175
225
600
750
0 .0 5
0 .0 5
0 .8 0
1 .2 0
1 .2 0
1 .0 5
1 .0 5
- 0 .0 5
0 .0 5
0 .0 5
M IN IM U M C U R V E
UI
T im e
Am p.
- 0 .7 7
- 0 .2 3
- 0 .2 3
- 0 .1 5
0 .0 0
0 .1 5
0 .2 3
0 .2 3
0 .4 6
0 .6 1
0 .9 3
1 .1 6
-5 0 0
-1 5 0
-1 5 0
-1 0 0
0
100
150
150
300
430
600
750
- 0 .0 5
- 0 .0 5
0 .5 0
0 .9 5
0 .9 5
0 .9 0
0 .5 0
- 0 .4 5
- 0 .4 5
- 0 .2 6
- 0 .0 5
- 0 .0 5
700
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-7. E1 Transmit Pulse Templates
1.2
1.1
269ns
SCALED AMPLITUDE
(in 75 ohm systems, 1.0 on the scale = 2.37Vpeak
in 120 ohm systems, 1.0 on the scale = 3.00Vpeak)
1.0
0.9
0.8
0.7
G.703
Template
194ns
0.6
0.5
219ns
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-250
-200
-150
-100
-50
0
TIME (ns)
25 of 115
50
100
150
200
250
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.4.2
LIU Transmit Front End
It is recommended that the LIU for the transmitter be configured as described in Figure 5-8 and in Table 5-6.
Figure 5-8. LIU Front End
3.3V
TFt
1:2
Dt
TVDDn
C1
TTIP
Dt
C2
Tx Line
Ct
Dt
TVSSn
TRING
Dt
(One Channel)
3.3V
AVDDn
C3
Dt
RTIP
C4
C5
A75 A100 A110
AVSSn
Rt
Dt
Rt
Dt
RRING
Dt
3.3V
TVS1
26 of 115
TFr
1:1 or 1:2
Rx Line
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 5-6. LIU Front-End Values
MODE
COMPONENT
Tx Capacitance
Ct
Tx Protection
Dt
Rx Transformer RTR 1:1
TFr
Tx Transformer 1:2
TFt
Rx Transformer RTR 1:2
Tx Transformer 1:2
Tx Decoupling (TVDDn)
Tx Decoupling (TVDDn)
Rx Decoupling (AVDD)
Rx Decoupling (AVDD)
Rx Termination
Rx Termination RTR 1:1
Rx Termination RTR 1:2
Voltage Protection
1
TFr
TFt
C1
C2
C3
C4
1
C5
1
Rt
1
Rt
TVS1
75W COAX, 120W TWISTED PAIR,
100/110W TWISTED PAIR
560pF typical. Adjust for board parasitics for optimal return loss.
International Rectifier 11DQ04 or 10BQ060,
Motorola MBR0540T1
Pulse TX1475 (recommended for both short/long-haul modes),
Halo TG83-S005NU (recommended for short-haul only)
Pulse T1124 (0°C to +70°C),
Pulse T1114 (-40°C to 85°C)
Common decoupling for all 16 channels = 68mF.
Recommended decoupling per channel = 0.1mF.
Common decoupling for all 16 channels = 68mF.
Decouple all six pins separately with a 0.1mF capacitor.
Rx capacitance for all 16 channels = 0.1mF.
Needed two resistors for all modes = 60.4W ±1%.
Needed two resistors for all modes = 15.0W ±1%.
SGS-Thomson SMLVT 3V3 (3.3V Transient Suppressor)
1
Only use if necessary for application.
5.4.3
Dual Rail
Dual-rail mode consists of TPOS, TNEG and TCLK pins on the system side. NRZ data is sampled on the falling
edge of TCLK as shown in Figure 9-12.
Figure 9-12 The Zero substitution B8ZS or HDB3 is not allowed. The data that appears on the TPOS pin will be
output on TTIP and data on the TNEG will be output on TRING after pulse shaping. Single-Rail Select Register
(SRMS) is used for selection of dual-rail or single-rail mode. The data that arrives at the TPOS and TNEG can be
overwritten in the maintenance mode by setting the BERT Control Register (BTCR).
5.4.4
Single-Rail Mode
Single-rail mode consists of TPOS, TNEG and TCLK pins on the System side. NRZ data is sampled on the falling
edge of TCLK as shown in Figure 9-12. The Zero substitution B8ZS or HDB3 is allowed. The TPOS data will be
encoded in AMI or B8ZS/HDB3 format on the TTIP and TRING pins after pulse shaping. Single-Rail Mode Select
(SRMS) is used for selection of dual-rail or single-rail mode. The data that arrives at the TPOS can be overwritten
in the maintenance mode by setting in BERT Control Register (BTCR).
5.4.5
Zero Suppression—B8ZS or HDB3
B8ZS coding is available when the device is in T1 mode (selected by TS2, TS1 and TS0 bits in the TS register).
B8ZS/HDB3 coding are enabled by default in single-rail mode. Setting the LCS bit in the LCS Register disables
B8ZS/HDB3. Note that if the individual LIU is configured in E1 mode then HDB3 code substitution will be selected.
Bipolar violations can be inserted via the BEIR register or Transmit Maintenance Register settings only if B8ZS or
HDB3 coding is turned off.
B8ZS substitution is defined in ANSI T1.102 and HDB3 in ITUT G.703 standards.
5.4.6
Transmit Power-Down
The transmitter will be powered down if the relevant bits in the TPDE are set. The TTIP/TRING outputs will be high
impedance when TPDE is set.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.4.7
Transmit All Ones
When Transmit All Ones is invoked continuous Ones are transmitted using MCLK as the Timing Reference. Data
input at TPOS and TNEG is ignored.
Transmit All ones can be sent by setting bits in the TAOE Register. Also Transmit All ones will be enabled if bits in
Register ATAOS are set and the corresponding receiver goes into LOS state in status register LOSS.
5.4.8
Drive Failure Monitor
The Driver Fail Monitor is connected to the TTIP and TRING pins. It will detect a Short or Open Circuit on the
Secondary side of the Transmit Transformer. The drive current will be limited to 50 ma if a short circuit is detected.
The DFMS status registers and the corresponding Interrupt and Enable Registers can be used to monitor the driver
failure.
5.5
Receiver
The 16 receivers of DS26334 are all identical. Either a 2:1 or 1:1 transformer can be used on the receive side
(selected by the RTR bit). The DS26334 is designed to be fully software-selectable for E1 and T1/J1 without the
need to change any external resistors for the receive-side. The receive impedance match settings are controlled by
the transmit template/impedance selection. See Figure 5-8 and Table 5-6 for external component values. All
internal impedance matching is enabled via the RIMPON bit.
The peak detector and data slicer process the received signal. The output of the data slicer goes to clock and data
recovery. A 2.048/1.544 PLL is internally multiplied by 16 via another internal PLL and fed to the clock recovery
system derives E1 or T1 clock. The clock recovery system uses the clock from the PLL circuit to form an 16 times
over sampler, which is used to recover the clock and data. This over sampling technique offers outstanding
performance to meet jitter tolerance specifications. Dependent on selection options B8ZS/HDB3/AMI decoding is
performed. These decoded data is provided to the system side in either single-rail or dual-rail mode. The selection
of single rail or dual rail is done by settings in the SRMS register.
The receiver is capable of recovering signals up to 36dB worth of attenuation for T1 mode, and up to 43dB for E1
mode. The receiver contains functionality to provide resistive gain up to 32 dB for monitor mode.
5.5.1
Receiver Monitor Mode
The receive equalizer is equipped with monitor mode function that allows for resistive gain up to 32dB, along with
cable attenuation of 6dB to 24dB as shown in the RSMM1–4 register.
5.5.2
Peak Detector and Slicer
The Slicer determines the polarity and presence of the received data. The output of the Slicer is sent to the Clock
and Data Recovery circuitry for extraction of data and clock. The slicer has a built-in peak detector for
determination of the slicing threshold.
5.5.3
Receive Level Indicator
The DS26334 will report the signal strength at RTIP and RRING in increments described in Table 6-18. via register
bits CnRL3-CnRL0 located in the RSL1–4 register.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.5.4
Clock and Data Recovery
The resultant E1 or T1 clock derived from the 2.048/1.544 PLL is internally multiplied by 16 via another internal PLL
and fed to the clock recovery system. The clock recovery system uses the clock from the PLL circuit to form a 16
times over sampler, which is used to recover the clock and data. This over sampling technique offers outstanding
performance to meet jitter tolerance specifications.
5.5.5
Loss of Signal
The DS26334 uses both the Digital and Analog loss detection method in compliance with the latest T1.231 for
T1/J1 and ITU G.775 or ETSI 300 233 for E1 mode of operation.
LOS is detected if the receiver level falls bellow a threshold analog voltage for certain duration. Alternatively this
can be termed as having received “zeros” for certain duration. The signal level and timing duration are defined in
accordance with the T1.231 or G.775 or ETSI 300 233 specifications.
For short-haul mode, the Loss Detection Thresholds are based on cable loss of 18dB for both T1 and E1 modes.
For long-haul mode, the LOS Detection Threshold is based on cable loss of 38dB for T1 mode and 45dB for E1
mode.
RCLK is replaced by MCLK when the receiver detects a Loss of signal. If the AISEL bit is set in the GC register or
the IAISEL bit is set, the RPOS/RNEG data is replaced by AIS. The loss state is exited when the receiver detects a
certain number of ones density at a higher signal level than the loss detection level. The loss detection signal level
and loss reset signal level are defined with a hysteresis to prevent the receiver from bouncing between “LOS” and
“no LOS” states.
The following table outlines the specifications governing the loss function:
Table 5-7. Loss Criteria T1.231, G.775, and ETSI 300 233 Specifications
CRITERIA
T1.231
Loss
Detection
Criteria
No pulses are detected for 175
±75 bits.
Loss Reset
Criteria
Loss is terminated if a duration
of 12.5% ones are detected over
duration of 175 ±75 bits.
Loss is not terminated if 8
consecutive zeros are found if
B8ZS encoding is used. If B8ZS
is not used loss is not
terminated if 100 consecutive
pulses are zero.
5.5.5.1
STANDARD
ITU G.775
No pulses are detected for
duration of 10 to 255 bit
periods.
The incoming signal has
transitions for duration of 10 to
255 bit periods.
ETSI 300 233
No pulses are detected for a
duration of 2048 bit periods or
1ms.
Loss reset criteria is not
defined.
4.5.3.1 ANSI T1.231 for T1 and J1 Modes
For short-haul mode, loss is detected if the received signal level is less than 200mV for duration of 192 bit periods.
LOS is reset if the all of the following criteria are met:
·
24 or more ones are detected in 192-bit period with a detection threshold of 300mV measured
at RTIP and RRING.
· During the 192 bits less than 100 consecutive zeros are detected.
· 8 consecutive zeros are not detected if B8ZS is set.
For long-haul mode, loss is detected if the received signal level is less than 30mV for duration of 192 bit periods.
LOS is reset if the all of the following criteria are met:
·
·
·
24 or more ones are detected in 192-bit period with a detection threshold of 40mV measured
at RTIP and RRING.
During the 192 bits less than 100 consecutive zeros are detected.
8 consecutive zeros are not detected if B8ZS is set.
29 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.5.5.2
4.5.3.1 ITU G.775 for E1 Modes
For short-haul mode, LOS is detected if the received signal level is less than 200mV for a continuous duration of
192 bit periods. LOS is reset if the receive signal level is greater than 300mV for a duration of 192 bit periods.
For long-haul mode, LOS is detected if the received signal level is less than 12mV for a continuous duration of 192
bit periods. LOS is reset if the receive signal level is greater than 20mV for a duration of 192 bit periods.
5.5.5.3
4.5.3.1 ETSI 200 233 for E1 Modes
For short-haul mode, LOS is detected if the received signal level is less than 200mV for a continuous duration of
2048 (1ms) bit periods. LOS is reset if the receive signal level is greater than 300mV for a duration of 192 bit
periods.
For long-haul mode, LOS is detected if the received signal level is less than 12mV for a continuous duration of 192
bit periods. LOS is reset if the receive signal level is greater than 20mV for a duration of 192 bit periods.
5.5.6
AIS
Table 5-8 outlines the DS26334 AIS related specifications. Table 5-9 states the AIS functionality in the DS26334.
The registers related to the AIS detection are shown in Table 5-10.
Table 5-8. AIS Criteria T1.231, G.775, and ETSI 300 233 Specifications
CRITERIA
ITU G.775 for E1
STANDARD
ETSI 300233 for E1
AIS
Detection
Criteria
2 or fewer zeros in each of 2
consecutive 512-bit stream
received.
Fewer than 3 zeros detected in
512 bit period.
AIS
Clearance
Criteria
3 or more zeros in each of 2
consecutive 512-bit streams
received.
3 or more zeros in 512 bits
received.
ANSI T1.231 for T1
Fewer than 9 zeros detected in
a 8192-bit period (a ones
density of 99.9% over a period
of 5.3ms) are received.
9 or more zeros detected in a
8192-bit period are received.
Table 5-9. AIS Detection and Reset Criteria for DS26334
CRITERIA
AIS
Detection
Criteria
AIS
Clearance
Criteria
ITU G.775 for E1
2 or fewer zeros in each of 2
consecutive 512-bit streams
received.
3 or more zeros in each of 2
consecutive 512-bit streams
received.
STANDARD
ETSI 300233 for E1
ANSI T1.231 for T1
Fewer than 3 zeros detected in
512-bit period.
Fewer than 9 zeros contained
in 8192 bits.
3 or more zeros in 512 bits
received.
9 or more bits received in a
8192-bit stream.
Table 5-10. Registers Related to AIS Detection
REGISTER
LOS/AIS Criteria
AIS Register
AIS Enable Register
AIS Interrupt
ACRONYM
POINTER
LASCS
AIS
AISIE
AISI
FUNCTIONALITY
Section Criteria for AIS (T1.231, G.775, ETSI 300233 for E1).
Set when AIS is detected.
If reset, interrupt due to AIS is not generated.
Latched if there is a change in AIS and the interrupt is enabled.
30 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.5.7
Bipolar Violation and Excessive Zero Detector
DS26334 detects code violations, BPV and excessive zero errors. The reporting of the errors is done through the
pin RNEGn/CVn.
Excessive zeros are detected if eight consecutive zeros are detected with B8ZS enabled and four consecutive
zeros are detected with HDB3 enabled. Excessive Zero detection is selectable when single-rail mode and
HDB3/B8ZS encoding/decoding is selected.
The bits in EZDE and CVDEB registers determine the combinations that are reported. Table 5-11 outlines the
functionality:
Table 5-11. BPV, Code Violation, and Excessive Zero Error Reporting
CONDITIONS
EZDE is reset, CVDEB is reset
EZDE is set, CVDEB is reset
EZDE is reset, CVDEB is set
EZDE is set, CVDEB is set
5.6
CVn PIN REPORTS
BPV + Code violation
BPV + Code violation + Excessive zero
BPV
BPV + Excessive zero
Jitter Attenuator
The DS26334 contains an onboard jitter attenuator that can be set to a depth of either 32 or 128 bits via the JADS
bit in register GC. It can also be controlled on an individual LIU basis by settings in the IJAFDS register.
The 128-bit mode is used in applications where large excursions of wander are expected. The 32-bit mode is used
in delay sensitive applications. The characteristics of the attenuation are shown in Figure 5-9. The jitter attenuator
can be placed in either the receive path or the transmit path or none by appropriately setting the JAPS and the JAE
bits in register GC. These selections can be changed on an individual LIU basis by settings in the IJAPS and IJAE.
In order for the jitter attenuator to operate properly, a 2.048MHz or multiple thereof or 1.544MHz clock or multiple
thereof must be applied at MCLK. ITU specification G.703 requires an accuracy of ±50ppm for both T1 and E1
Applications. TR62411 and ANSI specs require an accuracy of ±32ppm for T1 interfaces. On-board circuitry
adjusts either the recovered clock from the clock/data recovery block or the clock applied at the TCLK pin to create
a smooth jitter-free clock, which is used to clock data out of the jitter attenuator FIFO. It is acceptable to provide a
jittery clock at the TCLK pin if the jitter attenuator is placed on the transmit side. If the incoming jitter exceeds either
120UIP-P (buffer depth is 128 bits) or 28 UIP-P (buffer depth is 32 bits), then the DS26334 will divide the internal
nominal 32.768MHz (E1) or 24.704MHz (T1) clock by either 15 or 17 instead of the normal 16 to keep the buffer
from overflowing. When the device divides by either 15 or 17, it also sets the Jitter Attenuator Limit Trip (JFLT) bits
in the IJAFLT register described.
31 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-9. Jitter Attenuation
ITU G.7XX
Prohibited Area
TBR12
Prohibited
Area
-20dB
C
ve
ur
A
E1
T1
-40dB
TR 62411 (Dec. 90)
Prohibited Area
B
rve
Cu
JITTER ATTENUATION (dB)
0dB
-60dB
1
5.7
10
100
1K
FREQUENCY (Hz)
10K
100K
G.772 Monitor
In this application, only 14 transceivers are functional and two transceivers are used for nonintrusive monitoring of
input and output of the other 14 channels. Channel 9 is used for 10 to 16 channels and Channel 1 is used for 2 to 8
channels. G.772 monitoring is configured by GMC Registers (Table 6-9). While monitoring channel 1 can be
configured in remote loopback and the monitored signal can be output on TTIP1 and TRING1. While monitoring
channel 9 can be configured in remote loopback and the monitored signal can be output on TTIP9 and TRING9.
5.8
Loopbacks
The DS26334 provides four loopbacks for diagnostic purposes: analog loopback, digital loopback, remote
loopback, and dual loopback. Dual loopback is accomplished by turning on digital loopback and remote loopback at
the same time.
5.8.1
Analog Loopback
The analog output of the transmitter TTIP and TRING is looped back to RTIP and RRING of the receiver. Data at
RTIP and ring is ignored in analog loopback. This is shown in Figure 5-10.
32 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 5-10. Analog Loopback
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
5.8.2
H D B 3 /
B 8 Z S
E n c o d e r
H D B 3 /
B 8 Z S
D e c o d e r
O p tio n a l
J itt e r
A tte n u a to r
T r a n s m it
D ig it a l
O p t io n a l
J it te r
A tte n u a to r
R e c e iv e
D ig i ta l
T ra n s m it
A n a lo g
R e c e iv e
A n a lo g
Line
Driver
Rtip
Rring
Digital Loopback
The transmit system data TPOS and TNEG and TCLK will be looped back to output on RCLK, RPOS, and RNEG.
The data input at TPOS and TNEG will be encoded and output on TTIP and TRING. Signals at RTIP and RRING
will be ignored. This loopback is conceptually shown in Figure 5-11.
Figure 5-11 Digital Loopback
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
TTIPTPOS
H D B 3 /
B 8 Z S
E n c o d e r
O p tio n a l
J itt e r
A tte n u a to r
H D B 3 /
B 8 Z S
D e c o d e r
O p t io n a l
J it te r
A tte n u a to r
T r a n s m it
D ig it a l
R e c e iv e
D ig i ta l
33 of 115
T ra n s m it
A n a lo g
Line
Driver TRING
TNEG
RTIP
R e c e iv e
A n a lo g
RRING
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.8.3
Remote Loopback
The inputs at RTIP and RRING are looped back to TTIP and TRING. The inputs at TCLK, TPOS and TNEG are
ignored during a remote loopback. This loopback is conceptually shown in Figure 5-12.
Note: Remote loopback does not take precedence over transmit power-down and requires TCLK to operate. The
transmitters will use the recovered RCLK in remote loopback. TCLK is still required because if it is removed the
transmitters will power-down (TCLK held low) or transmit all ones (TCLK held high).
Figure 5-12. Remote Loopback
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
5.9
TTIP
TPOS
H D B 3 /
B 8 Z S
E n c o d e r
O p tio n a l
J itt e r
A tte n u a to r
H D B 3 /
B 8 Z S
D e c o d e r
O p t io n a l
J it te r
A tte n u a to r
T r a n s m it
D ig it a l
R e c e iv e
D ig i ta l
T ra n s m it
A n a lo g
Line
Driver TRING
TNEG
RTIP
R e c e iv e
A n a lo g
RRING
BERT
There are two bit error rate testers available on the DS26334. One BERT can be mapped into LIUs 1–8 and the
other into LIUs 9-16 via the BTCR registers. The two BERTs operate independently of each other.
5.9.1
General Description
The BERT is a software programmable test pattern generator and monitor capable of meeting most error
performance requirements for digital transmission equipment. It will generate and synchronize to pseudo-random
n
y
patterns with a generation polynomial of the form x + x + 1, where n and y can take on values from 1 to 32 and to
repetitive patterns of any length up to 32 bits.
The transmit direction generates the programmable test pattern, and inserts the test pattern payload into the data
stream.
The receive direction extracts the test pattern payload from the receive data stream, and monitors the test pattern
payload for the programmable test pattern.
Features
·
·
·
·
·
n
y
Programmable PRBS pattern – The Pseudo Random Bit Sequence (PRBS) polynomial (x + x + 1) and seed
n
are programmable (length n = 1 to 32, tap y = 1 to n – 1, and seed = 0 to 2 – 1).
Programmable repetitive pattern – The repetitive pattern length and pattern are programmable (the length n
n
= 1 to 32 and pattern = 0 to 2 – 1).
24-bit error count and 32-bit bit count registers
Programmable bit error insertion – Errors can be inserted individually, on a pin transition, or at a specific
n
rate. The rate 1/10 is programmable (n = 1 to 7).
-3
Pattern synchronization at a 10 BER – Pattern synchronization will be achieved even in the presence of a
-3
random Bit Error Rate (BER) of 10 .
34 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.9.2
Configuration and Monitoring
Set BTCR.BERTE = 1 to enable the BERT. The following tables show how to configure the on-board BERT to send
and receive common patterns.
Table 5-12. Pseudorandom Pattern Generation
PATTERN TYPE
9
2 -1 O.153 (511 type)
11
2 -1 O.152 and O.153
(2047 type)
15
2 -1 O.151
PTF[4:0]
(hex)
04
BPCR REGISTER
PLF[4:0]
PTS
(hex)
08
0
QRSS
BERT.
PCR
BERT.
SPR2
BERT.
SPR1
0
0x0408
0xFFFF
0xFFFF
BERT.CR
TPIC,
RPIC
0
08
0A
0
0
0x080A
0xFFFF
0xFFFF
0
0D
0E
0
0
0x0D0E
0xFFFF
0xFFFF
1
20
10
13
0
0
0x1013
0xFFFF
0xFFFF
0
20
02
13
0
1
0x0253
0xFFFF
0xFFFF
0
23
11
16
0
0
0x1116
0xFFFF
0xFFFF
1
2 -1 O.153
2 -1 O.151 QRSS
2 -1 O.151
Table 5-13. Repetitive Pattern Generation
PATTERN TYPE
all 1s
BPCR REGISTER
PTF[4:0] PLF[4:0]
PTS
(hex)
(hex)
NA
00
1
QRSS
BERT.
PCR
BERT.
SPR2
BERT.
SPR1
0
0x0020
0xFFFF
0xFFFF
all 0s
NA
00
1
0
0x0020
0xFFFF
0xFFFE
alternating 1s and 0s
NA
01
1
0
0x0021
0xFFFF
0xFFFE
double alternating and 0s
NA
03
1
0
0x0023
0xFFFF
0xFFFC
3 in 24
NA
17
1
0
0x0037
0xFF20
0x0022
1 in 16
NA
0F
1
0
0x002F
0xFFFF
0x0001
1 in 8
NA
07
1
0
0x0027
0xFFFF
0xFF01
1 in 4
NA
03
1
0
0x0023
0xFFFF
0xFFF1
After configuring these bits, the pattern must be loaded into the BERT. This is accomplished via a zero-to-one
transition on BCR.TNPL and BCR.RNPL
Monitoring the BERT requires reading the BSR register, which contains the Bit Error Count (BEC) bit and the Out
of Synchronization (OOS) bit. The BEC bit will be one when the bit error counter is one or more. The OOS will be
one when the receive pattern generator is not synchronized to the incoming pattern, which will occur when it
receives a minimum 6 bit errors within a 64-bit window. The Receive BERT Bit Count Register (RBCR) and the
Receive BERT Bit Error Count Register (RBECR) will be updated upon the reception of a Performance Monitor
Update signal (e.g. BCR.LPMU). This signal will update the registers with the values of the counters since the last
update and will reset the counters.
35 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.9.3
Receive Pattern Detection
The Receive BERT receives only the payload data and synchronizes the receive pattern generator to the incoming
pattern. The receive pattern generator is a 32-bit shift register that shifts data from the least significant bit (LSB) or
bit 1 to the most significant bit (MSB) or bit 32. The input to bit 1 is the feedback. For a PRBS pattern (generating
n
y
polynomial x + x + 1), the feedback is an XOR of bit n and bit y. For a repetitive pattern (length n), the feedback is
bit n. The values for n and y are individually programmable (1 to 32). The output of the receive pattern generator is
the feedback. If QRSS is enabled, the feedback is an XOR of bits 17 and 20, and the output will be forced to one if
the next 14 bits are all zeros. QRSS is programmable (on or off). For PRBS and QRSS patterns, the feedback will
be forced to one if bits 1 through 31 are all zeros. Depending on the type of pattern programmed, pattern detection
performs either PRBS synchronization or repetitive pattern synchronization.
5.9.3.1
Receive PRBS Synchronization
PRBS synchronization synchronizes the receive pattern generator to the incoming PRBS or QRSS pattern. The
receive pattern generator is synchronized by loading 32 data stream bits into the receive pattern generator, and
then checking the next 32 data stream bits. Synchronization is achieved if all 32 bits match the incoming pattern. If
at least six incoming bits in the current 64-bit window do not match the receive pattern generator, automatic pattern
re-synchronization is initiated. Automatic pattern re-synchronization can be disabled.
See Figure 5-13 for the PRBS synchronization diagram.
Figure 5-13. PRBS Synchronization State Diagram
Sync
f6
err
ors
6o
32
ors
err
bi t
sw
ith
h
wit
its
out
4b
1 bit error
Verify
Load
32 bits loaded
36 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.9.3.2
Receive Repetitive Pattern Synchronization
Repetitive pattern synchronization synchronizes the receive pattern generator to the incoming repetitive pattern.
The receive pattern generator is synchronized by searching each incoming data stream bit position for the
repetitive pattern, and then checking the next 32 data stream bits. Synchronization is achieved if all 32 bits match
the incoming pattern. If at least six incoming bits in the current 64-bit window do not match the receive PRBS
pattern generator, automatic pattern re-synchronization is initiated. Automatic pattern re-synchronization can be
disabled.
See Figure 5-14 for the repetitive pattern synchronization state diagram.
Figure 5-14. Repetitive Pattern Synchronization State Diagram
Sync
f6
err
ors
6o
32
ors
err
bi t
sw
ith
h
wit
its
out
4b
1 bit error
Verify
Match
Pattern Matches
5.9.3.3
Receive Pattern Monitoring
Receive pattern monitoring monitors the incoming data stream for both an OOS condition and bit errors and counts
the incoming bits. An Out Of Synchronization (OOS) condition is declared when the synchronization state machine
is not in the “Sync” state. An OOS condition is terminated when the synchronization state machine is in the “Sync”
state.
Bit errors are determined by comparing the incoming data stream bit to the receive pattern generator output. If they
do not match, a bit error is declared, and the bit error and bit counts are incremented. If they match, only the bit
count is incremented. The bit count and bit error count are not incremented when an OOS condition exists.
37 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
5.9.4
Transmit Pattern Generation
Pattern Generation generates the outgoing test pattern, and passes it onto Error Insertion. The transmit pattern
generator is a 32-bit shift register that shifts data from the least significant bit (LSB) or bit 1 to the most significant
n
y
bit (MSB) or bit 32. The input to bit 1 is the feedback. For a PRBS pattern (generating polynomial x + x + 1), the
feedback is an XOR of bit n and bit y. For a repetitive pattern (length n), the feedback is bit n. The values for n and
y are individually programmable (1 to 32). The output of the receive pattern generator is the feedback. If QRSS is
enabled, the feedback is an XOR of bits 17 and 20, and the output will be forced to one if the next 14 bits are all
zeros. QRSS is programmable (on or off). For PRBS and QRSS patterns, the feedback will be forced to one if bits
1 through 31 are all zeros. When a new pattern is loaded, the pattern generator is loaded with a seed/pattern value
n
before pattern generation starts. The seed/pattern value is programmable (0 – 2 – 1).
5.9.4.1 Transmit Error Insertion
Error insertion inserts errors into the outgoing pattern data stream. Errors are inserted one at a time or at a rate of
n
one out of every 10 bits. The value of n is programmable (1 to 7 or off). Single bit error insertion can be initiated
from the microprocessor interface, or by the manual error insertion input (TMEI). The method of single error
insertion is programmable (register or input). If pattern inversion is enabled, the data stream is inverted before the
overhead/stuff bits are inserted. Pattern inversion is programmable (on or off).
38 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
6 REGISTER MAPS AND DEFINITION
Six address bits are used to control the settings of the registers. In the parallel nonmultiplexed mode address [5:0]
is used. In multiplexed mode AD [5:0] is used and A [6:1] is used in the serial mode. The register space contains
two independent sets of registers. The lower set of registers (LIUs 1-8) is located from address 00 hex to 1F hex
and contains controls for LIUs 1-8. The upper set of registers (LIUs 9-16) is a duplicate of the lower set, located
from address 20 hex to 3F hex that controls LIUs 9-16. Each of these sets of registers consists of 4 banks
(Primary, Secondary, Individual LIU, and BERT). The ADDP register for the lower set of registers (LIUs 1-8) is
located at address 1F hex. This register is used as a pointer to access the 4 banks of registers in the lower (LIUs 18) register set. Similarly, the ADDP register for the upper set of registers (LIUs 9-16) is located at address 3F hex.
This register is used as a pointer to access the 4 banks of registers in the upper (LIUs 9-16) register set. Setting an
ADDP register to AA hex will access the Secondary bank of registers, 01 hex will access the Individual LIU bank of
registers, 02 hex will access the BERT bank of registers, and 00 hex (default on power-up) will access the Primary
bank of registers. Note that bank selection for the lower set of registers (LIUs 1-8) is controlled only by the ADDP at
1F hex and that bank selection for the upper set of registers (LIUs 9-16) is controlled only by the ADDP at 3F hex.
39 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-1. Primary Register Set
NAME
Identification
Analog Loopback Configuration
Remote Loopback Configuration
Transmit All Ones Enable
LOS Status
Driver Fault Monitor Status
LOS Interrupt Enable
Driver Fault Monitor Interrupt Enable
LOS Interrupt Status
Driver Fault Monitor Interrupt Status
Software Reset
G.772 Monitor Configuration
Digital Loopback Configuration
LOS/AIS Criteria Selection
Automatic Transmit All Ones Select
Global Configuration
Template Select Transceiver Register
Template Select
Output Enable
Alarm Indication Signal
AIS Interrupt Enable
AIS Interrupt Status
Reserved
Address Pointer for Bank Selection
SYMBOL
HEX FOR
CH 1-8
ID
ALBC
RLBC
TAOE
LOSS
DFMS
LOSIE
DFMIE
LOSIS
DFMIS
SWR
GMC
DLBC
LASCS
ATAOS
GC
TST
TS
OE
AIS
AISIE
AISIS
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
—
16–1E
ADDP
1F
ADDRESS FOR CH 1-8
PARALLEL
SERIAL
INTERFACE
INTERFACE
A7-A0 (HEX) A7-A1 (HEX)
xx000000
xx000001
xx000010
xx000011
xx000100
xx000101
xx000110
xx000111
xx001000
xx001001
xx001010
xx001011
xx001100
xx001101
xx001110
xx001111
xx010000
xx010001
xx010010
xx010011
xx010100
xx010101
xx010110–
xx011110
xx011111
40 of 115
x000000
x000001
x000010
x000011
x000100
x000101
x000110
x000111
x001000
x001001
x001010
x001011
x001100
x001101
x001110
x001111
x010000
x010001
x010010
x010011
x010100
x010101
x010110–
x011110
x011111
HEX FOR
CH 9-16
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36–3E
3F
ADDRESS FOR CH 9-16
PARALLEL
SERIAL
INTERFACE
INTERFACE
A7-A0 (HEX) A7-A1 (HEX)
Not used
xx100001
xx100010
xx100011
xx100100
xx100101
xx100110
xx100111
xx101000
xx101001
xx101010
xx101011
xx101100
xx101101
xx101110
xx101111
xx110000
xx110001
xx110010
xx110011
xx110100
xx110101
xx110110–
x111110
xx111111
Not used
x100001
x100010
x100011
x100100
x100101
x100110
x100111
x101000
x101001
x101010
x101011
x101100
x101101
x101110
x101111
x110000
x110001
x110010
x110011
x110100
x110101
x110110–
x111110
x111111
RW
R
RW
RW
RW
R
R
RW
RW
R
R
W
RW
RW
RW
RW
RW
RW
RW
RW
R
RW
R
—
RW
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-2. Secondary Register Set
NAME
Single-Rail Mode Select
Line Code Selection
Not Used
Receive Power-Down Enable
Transmit Power-Down Enable
Excessive Zero Detect Enable
Code Violation Detect Enable Bar
Not Used
Address Pointer for Bank Selection
SYMBOL
HEX
FOR
CH 1-8
SRMS
LCS
—
RPDE
TPDE
EZDE
CVDEB
00
01
02
03
04
05
06
—
07–1E
ADDP
1F
ADDRESS FOR CHANNELS 1-8
PARALLEL
SERIAL
INTERFACE
INTERFACE
A7-A0 (HEX)
A7-A1 (HEX)
xx000000
xx000001
xx000010
xx000011
xx000100
xx000101
xx000110
xx000111–
xx011110
xx011111
41 of 115
x000000
x000001
x000010
x000011
x000100
x000101
x000110
x000111–
x011110
x011111
HEX
FOR
CH 9-16
20
21
22
23
24
25
26
27–3E
3F
ADDRESS FOR CHANNELS 9-16
PARALLEL
SERIAL
INTERFACE
INTERFACE
A7-A0 (HEX)
A7-A1 (HEX)
xx100000
xx100001
xx100010
xx100011
xx100100
xx100101
xx100110
xx100111–
xx111110
xx111111
x100000
x100001
x100010
x100011
x100100
x100101
x100110
x100111–
x111110
x111111
RW
RW
R
R
RW
RW
R
R
W
RW
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-3. Individual LIU Register Set
NAME
Individual JA Enable
Individual JA Position Select
Individual JA FIFO Depth Select
Individual JA FIFO Limit Trip
Individual Short-Circuit Protection
Disable
Individual AIS Select
Master Clock Select
Short-Haul/Long-Haul Select
Receive Sensitivity Monitor Mode
1–4
Receive Signal Level Indicator 1–4
Bit Error Rate Tester Control
Register
Line Violation Detect Status
Receive Clock Invert
Transmit Clock Invert
Clock Control Register
RCLK Disable Upon LOS Register
Global Interrupt Status Control
Address Pointer for Bank Selection
ADDRESS FOR CHANNELS 1-8
PARALLEL
SERIAL
INTERFACE
INTERFACE
A7-A0 (HEX)
A7-A1 (HEX)
ADDRESS FOR CHANNELS 9-16
PARALLEL
SERIAL
INTERFACE
INTERFACE
A7-A0 (HEX)
A7-A1 (HEX)
SYMBOL
HEX
FOR
CH 1-8
IJAE
IJAPS
IJAFDS
IJAFLT
00
01
02
03
xx000000
xx000001
xx000010
xx000011
x000000
x000001
x000010
x000011
20
21
22
23
xx100000
xx100001
xx100010
xx100011
x100000
x100001
x100010
x100011
RW
RW
RW
R
ISCPD
04
xx000100
x000100
24
xx100100
x100100
RW
IAISEL
MC
SHLHS
05
06
07
RSL1–4
0C–0F
xx100101
Not used
xx100111
xx101000–
xx101011
xx101100–
xx101111
x100101
Not used
x100111
x101000–
x101011
x101100–
x101111
RW
RW
RW
08–0B
x000101
x000110
x000111
x001000–
x001011
x001100–
x001111
25
26
27
RSMM1–4
xx000101
xx000110
xx000111
xx001000–
xx001011
xx001100–
xx001111
BTCR
10
xx010000
x010000
30
xx110000
x110000
RW
LVDS
RCLKI
TCLKI
CCR
RDULR
GISC
ADDP
12
13
14
15
16
1E
1F
xx010010
xx010011
xx010100
xx010101
xx010110
xx011110
xx011111
x010010
x010011
x010100
x010101
x010110
x011110
x011111
32
33
34
35
36
3E
3F
xx110010
xx110011
xx110100
Not used
xx110110
Not used
xx111111
x110010
x110011
x110100
Not used
x110110
Not used
x111111
R
RW
RW
RW
RW
RW
RW
42 of 115
HEX FOR
CH 9-16
28–2B
2C–2F
RW
RW
R
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-4. BERT Register Set
ADDRESS FOR CHANNELS 1-8
NAME
BERT Control Register
Reserved
BERT Pattern Configuration 1
BERT Pattern Configuration 2
BERT Seed/Pattern 1
BERT Seed/Pattern 2
BERT Seed/Pattern 3
BERT Seed/Pattern 4
Transmit Error Insertion Control
Reserved
BERT Status Register
Reserved
BERT Status Register Latched
BERT Status Register Interrupt Enable
Reserved
Receive Bit Error Count Register 1
Receive Bit Error Count Register 2
Receive Bit Error Count Register 3
Receive Bit Error Count Register 4
Receive Bit Count Register 1
Receive Bit Count Register 2
Receive Bit Count Register 3
Receive Bit Count Register 4
Reserved
Address Pointer for Bank Selection
SYMBOL
BCR
HEX FOR
CH 1-8
BPCR1
BPCR2
BSPR1
BSPR2
BSPR3
BSPR4
TEICR
00
01
02
03
04
05
06
07
08
—
09–0A
BSR
BSRL
BSRIE
0C
0D
0E
10
—
11–13
RBECR1
RBECR2
RBECR3
RBECR4
RBCR1
RBCR2
RBCR3
RBCR4
14
15
16
17
18
19
1A
1B
—
1C–1E
ADDP
1F
HEX FOR
CH 9-16
PARALLEL
INTERFACE
A7-A0 (HEX)
SERIAL
INTERFACE
A7-A1 (HEX)
xx000000
xx000001
xx000010
xx000011
xx000100
xx000101
xx000110
xx000111
xx001000
xx001001–
x001010
xx001100
xx001101
xx010011
xx010000
xx010001–
xx010011
xx010100
xx010101
xx010110
xx010111
xx011000
xx011001
xx011010
xx011011
xx011100–
xx011110
xx011111
x000000
x000001
x000010
x000011
x000100
x000101
x000110
x000111
x001000
20
21
22
23
24
25
26
27
28
—
29–2A
x001100
x001101
x010011
x010000
X010001–
x010011
x010100
x010101
x010110
x010111
x011000
x011001
x011010
x011011
x011100–
x011110
x011111
2C
2D
2E
30
43 of 115
31–33
34
35
36
37
38
39
3A
3B
3C–3E
3F
ADDRESS FOR
CHANNELS 9-16
PARALLEL
SERIAL
INTERFACE INTERFACE
A7-A0 (HEX) A7-A1 (HEX)
xx100000
xx100001
xx100010
xx100011
xx100100
xx100101
xx100110
xx100111
xx101000
xx101001–
x101010
xx101100
xx101101
xx110011
xx110000
xx110001–
xx110011
xx110100
xx110101
xx110110
xx110111
xx111000
xx111001
xx111010
xx111011
xx111100–
xx111110
xx111111
x100000
x100001
x100010
x100011
x100100
x100101
x100110
x100111
x101000
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
x101100
x101101
x110011
x110000
x110001–
x110011
x110100
x110101
x110110
x110111
x111000
x111001
x111010
x111011
x111100–
x111110
x111111
R
RW
RW
—
R
R
R
R
R
R
R
R
—
RW
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-5. Primary Register Set Bit Map
REGISTER
ADDRESS
FOR LIUS
1-8
R/W
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ID
ALBC
RLBC
TAOE
LOSS
DFMS
LOSIE
DFMIE
LOSIS
DFMIS
SWR
GMC
DLBC
LASCS
ATAOS
GC
TST
TS
OE
AIS
AISIE
AISI
Not Used
ADDP
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16-1E
1F
R
RW
RW
RW
RW
RW
RW
RW
R
R
W
RW
RW
RW
RW
RW
RW
RW
RW
R
RW
R
—
RW
ID7
ALC8
RLBC8
TAOE8
LOSS8
DFMS8
LOSIE8
DFMIE8
LOSIS8
DFMIS8
SWRL
—
DLBC8
LASCS8
ATAOS8
RIMPMS
—
RIMPON
OE8
AIS8
AISIE8
AISI8
—
ADDP7
ID6
ALBC7
RLBC7
TAOE7
LOSS7
DFMS7
LOSIE7
DFMIE7
LOSIS7
DFMIS7
SWRL
—
DLBC7
LASCS7
ATAOS7
AISEL
—
TIMPOFF
OE7
AIS7
AISIE7
AISI7
—
ADDP6
ID5
ALBC6
RLBC6
TAOE6
LOSS6
DFMS6
LOSIE6
DFMIE6
LOSIS6
DFMIS6
SWRL
—
DLBC6
LASCS6
ATAOS6
SCPD
—
—
OE6
AIS6
AISIE6
AISI6
—
ADDP5
ID4
ALBC5
RLBC5
TAOE5
LOSS5
DFMS5
LOSIE5
DFMIE5
LOSIS5
DFMIS5
SWRL
—
DLBC5
LASCS5
ATAOS5
CODE
—
—
OE5
AIS5
AISIE5
AISI5
—
ADDP4
ID3
ALBC4
RLBC4
TAOE4
LOSS4
DFMS4
LOSIE4
DFMIE4
LOSIS4
DFMIS4
SWRL
GMC4
DLBC4
LASCS4
ATAOS4
JADS
—
TIMPRM
OE4
AIS4
AISIE4
AISI4
—
ADDP3
ID2
ALBC3
RLBC3
TAOE3
LOSS3
DFMS3
LOSIE3
DFMIE3
LOSIS3
DFMIS3
SWRL
GMC3
DLBC3
LASCS3
ATAOS3
RTCTL
TST2
TS2
OE3
AIS3
AISIE3
AISI3
—
ADDP2
ID1
ALBC2
RLBC2
TAOE2
LOSS2
DFMS2
LOSIE2
DFMIE2
LOSIS2
DFMIS2
SWRL
GMC2
DLBC2
LASCS2
ATAOS2
JAPS
TST1
TS1
OE2
AIS2
AISIE2
AISI2
—
ADDP1
ID0
ALBC1
RLBC1
TAOE1
LOSS1
DFMS1
LOSIE1
DFMIE1
LOSIS1
DFMIS1
SWRL
GMC1
DLBC1
LASCS1
ATAOS1
JAE
TST0
TS0
OE1
AIS1
AISIE1
AISI1
—
ADDP0
REGISTER
ADDRESS
FOR LIUS
9-16
R/W
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Not Used
ALBC
RLBC
TAOE
LOSS
DFMS
LOSIE
DFMIE
LOSIS
DFMIS
SWR
GMC
DLBC
LASCS
ATAOS
GC
TST
TS
OE
AIS
AISIE
AISI
Not Used
ADDP
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36-3E
3F
R
RW
RW
RW
RW
RW
RW
RW
R
R
W
RW
RW
RW
RW
RW
RW
RW
RW
R
RW
R
—
RW
—
ALC16
RLBC16
TAOE16
LOSS16
DFMS16
LOSIE16
DFMIE16
LOSIS16
DFMIS16
SWRU
—
DLBC16
LASCS16
—
ALBC15
RLBC15
TAOE15
LOSS15
DFMS15
LOSIE15
DFMIE15
LOSIS15
DFMIS15
SWRU
—
DLBC15
LASCS15
—
ALBC14
RLBC14
TAOE14
LOSS14
DFMS14
LOSIE14
DFMIE14
LOSIS14
DFMIS14
SWRU
—
DLBC14
LASCS14
—
ALBC13
RLBC13
TAOE13
LOSS13
DFMS13
LOSIE13
DFMIE13
LOSIS13
DFMIS13
SWRU
—
DLBC13
LASCS13
—
ALBC12
RLBC12
TAOE12
LOSS12
DFMS12
LOSIE12
DFMIE12
LOSIS12
DFMIS12
SWRU
GMC4
DLBC12
LASCS12
—
ALBC11
RLBC11
TAOE11
LOSS11
DFMS11
LOSIE11
DFMIE11
LOSIS11
DFMIS11
SWRU
GMC3
DLBC11
LASCS11
—
ALBC10
RLBC10
TAOE10
LOSS10
DFMS10
LOSIE10
DFMIE10
LOSIS10
DFMIS10
SWRU
GMC2
DLBC10
LASCS10
—
ALBC9
RLBC9
TAOE9
LOSS9
DFMS9
LOSIE9
DFMIE9
LOSIS9
DFMIS9
SWRU
GMC1
DLBC9
LASCS9
ATAOS16
ATAOS15
ATAOS14
ATAOS13
ATAOS12
ATAOS11
ATAOS10
ATAOS9
RIMPMS
—
RIMPON
OE16
AIS16
AISIE16
AISI16
—
ADDP7
AISEL
—
TIMPOFF
OE15
AIS15
AISIE15
AISI15
—
ADDP6
SCPD
—
—
OE14
AIS14
AISIE14
AISI14
—
ADDP5
CODE
—
—
OE13
AIS13
AISIE13
AISI13
—
ADDP4
JADS
—
TIMPRM
OE12
AIS12
AISIE12
AISI12
—
ADDP3
RTCTL
TST2
TS2
OE11
AIS11
AISIE11
AISI11
—
ADDP2
JAPS
TST1
TS1
OE10
AIS10
AISIE10
AISI10
—
ADDP1
JAE
TST0
TS0
OE9
AIS9
AISIE9
AISI9
—
ADDP0
44 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-6. Secondary Register Set Bit Map
REGISTER
ADDRESS
FOR LIUS
1-8
RW
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SRS
LCS
Not Used
RPDE
TPDE
EZDE
CVDEB
Not Used
ADDP
00
01
02
03
04
05
06
07-1E
1F
RW
RW
RW
RW
RW
RW
RW
—
RW
SRMS8
LCS8
—
RPDE8
TPDE8
EZDE8
CVDEB8
—
ADDP7
SRMS7
LCS7
—
RPDE7
TDPE7
EZDE7
CVDEB7
—
ADDP6
SRMS6
LCS6
—
RPDE6
TPDE6
EZDE6
CVDEB6
—
ADDP5
SRMS5
LCS5
—
RPDE5
TPDE5
EZDE5
CVDEB5
—
ADDP4
SRMS4
LSC4
—
RPDE4
TPDE4
EZDE4
CVDEB4
—
ADDP3
SRMS3
LCS3
—
RPDE3
TPDE3
EZDE3
CVDEB3
—
ADDP2
SRMS2
LSC2
—
RPDE2
TPDE2
EZDE2
CVDEB2
—
ADDP1
SRMS1
LSC1
—
RPDE1
TPDE1
EZDE1
CVDEB1
—
ADDP0
REGISTER
ADDRESS
FOR LIUS
9-16
RW
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SRS
LCS
Not Used
RPDE
TPDE
EZDE
CVDEB
Not Used
ADDP
20
21
22
23
24
25
26
27-3E
3F
RW
RW
RW
RW
RW
RW
RW
—
RW
SRMS16
LCS16
—
RPDE16
TPDE16
EZDE16
SRMS15
LCS15
—
RPDE15
TDPE15
EZDE15
SRMS14
LCS14
—
RPDE14
TPDE14
EZDE14
SRMS13
LCS13
—
RPDE13
TPDE13
EZDE13
SRMS12
LSC12
—
RPDE12
TPDE12
EZDE12
SRMS11
LCS11
—
RPDE11
TPDE11
EZDE11
SRMS10
LSC10
—
RPDE10
TPDE10
EZDE10
SRMS9
LSC9
—
RPDE9
TPDE9
EZDE9
CVDEB16
CVDEB15
CVDEB14
CVDEB13
CVDEB12
CVDEB11
CVDEB10
CVDEB9
—
ADDP7
—
ADDP6
—
ADDP5
—
ADDP4
—
ADDP3
—
ADDP2
—
ADDP1
—
ADDP0
45 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-7. Individual LIU Register Set Bit Map
REGISTER
ADDRES
S FOR
LIUS
1-8
RW
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
IJAE
IJAPS
IJAFDS
IJAFLT
ISCPD
IAISEL
MC
SHLHS
RSMM1
RSMM2
RSMM3
RSMM4
RSL1
RSL2
RSL3
RSL4
BTCR
BEIR
LVDS
RCLKI
TCLKI
CCR
RDULR
GISC
ADDP
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
1E
1F
RW
RW
RW
R
RW
RW
RW
RW
RW
RW
RW
RW
R
R
R
R
RW
RW
R
RW
RW
RW
RW
RW
RW
IJAE8
IJAPS8
IJAFDS8
IJAFLT8
ISCPD8
IAISEL8
PCLKI1
SHLHS8
RTR2
RTR4
RTR6
RTR8
C2RSL3
C4RSL3
C6RSL3
C8RSL3
BTS2
BEIR8
LVDS8
RCLKI8
TCLKI8
PCLKS2
RDULR8
—
ADDP7
IJAE7
IJAPS7
IJAFDS7
IJAFLT7
ISCPD7
IAISEL7
PCLKI0
SHLHS7
C2RSM2
C4RSM2
C6RSM2
C8RSM2
C2RSL2
C4RSL2
C6RSL2
C8RSL2
BTS1
BEIR7
LVDS7
RCLKI7
TCLKI7
PCLKS1
RDULR7
—
ADDP6
IJAE6
IJAPS6
IJAFDS6
IJAFLT6
ISCPD6
IAISEL6
TECLKE
SHLHS6
C2RSM1
C4RSM1
C6RSM1
C8RSM1
C2RSL1
C4RSL1
C6RSL1
C8RSL1
BTS0
BEIR6
LVDS6
RCLKI6
TCLKI6
PCLKS0
RDULR6
—
ADDP5
IJAE5
IJAPS5
IJAFDS5
IJAFLT5
ISCPD5
IAISEL5
CLKAE
SHLHS5
C2RSM0
C4RSM0
C6RSM0
C8RSM0
C2RSL0
C4RSL0
C6RSL0
C8RSL0
—
BEIR5
LVDS5
RCLKI5
TCLKI5
TECLKS
RDULR5
—
ADDP4
IJAE4
IJAPS4
IJAFDS4
IJAFLT4
ISCPD4
IAISEL4
MPS1
SHLHS4
RTR1
RTR3
RTR5
RTR7
C1RSL3
C3RSL3
C5RSL3
C7RSL3
—
BEIR4
LVDS4
RCLKI4
TCLKI4
CLKA3
RDULR4
—
ADDP3
IJAE3
IJAPS3
IJAFDS3
IJAFLT3
ISCPD3
IAISEL3
MPS0
SHLHS3
C1RSM2
C3RSM2
C5RSM2
C7RSM2
C1RSL2
C3RSL2
C5RSL2
C7RSL2
—
BEIR3
LVDS3
RCLKI3
TCLKI3
CLKA2
RDULR3
—
ADDP2
IJAE2
IJAPS2
IJAFDS2
IJAFLT2
ISCPD2
IAISEL2
FREQS
SHLHS2
C1RSM1
C3RSM1
C5RSM1
C7RSM1
C1RSL1
C3RSL1
C5RSL1
C7RSL1
—
BEIR2
LVDS2
RCLKI2
TCLKI2
CLKA1
RDULR2
INTM
ADDP1
IJAE1
IJAPS1
IJAFDS1
IJAFLT1
ISCPD1
IAISEL1
PLLE
SHLHS1
C1RSM0
C3RSM0
C5RSM0
C7RSM0
C1RSL0
C3RSL0
C5RSL0
C7RSL0
BERTE
BEIR1
LVDS1
RCLKI1
TCLKI1
CLKA0
RDULR1
CWE
ADDP0
REGISTER
ADDRES
S FOR
LIUS
9 -16
RW
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
RW
RW
RW
R
RW
RW
RW
RW
RW
RW
RW
RW
R
R
R
R
RW
RW
R
RW
RW
RW
RW
RW
RW
IJAE16
IJAPS16
IJAFDS16
IJAFLT16
ISCPD16
IAISEL16
—
SHLHS16
RTR10
RTR12
RTR14
RTR8
C10RSL3
C12RSL3
C14RSL3
C16RSL3
BTS2
BEIR16
LVDS16
RCLKI16
TCLKI16
—
RDULR16
—
ADDP7
IJAE15
IJAPS15
IJAFDS15
IJAFLT15
ISCPD15
IAISEL15
—
SHLHS15
C10RSM2
C12RSM2
C14RSM2
C16RSM2
C10RSL2
C12RSL2
C14RSL2
C16RSL2
BTS1
BEIR15
LVDS15
RCLKI15
TCLKI15
—
RDULR15
—
ADDP6
IJAE14
IJAPS14
IJAFDS14
IJAFLT14
ISCPD14
IAISEL14
—
SHLHS14
C10RSM1
C12RSM1
C14RSM1
C16RSM1
C10RSL1
C12RSL1
C14RSL1
C16RSL1
BTS0
BEIR14
LVDS14
RCLKI14
TCLKI14
—
RDULR14
—
ADDP5
IJAE13
IJAPS13
IJAFDS13
IJAFLT13
ISCPD13
IAISEL13
—
SHLHS13
C10RSM0
C12RSM0
C14RSM0
C16RSM0
C10RSL0
C12RSL0
C14RSL0
C16RSL0
—
BEIR13
LVDS13
RCLKI13
TCLKI13
—
RDULR13
—
ADDP4
IJAE12
IJAPS12
IJAFDS12
IJAFLT12
ISCPD12
IAISEL12
—
SHLHS12
RTR9
RTR11
RTR13
RTR16
C9RSL3
C11RSL3
C13RSL3
C15RSL3
—
BEIR12
LVDS12
RCLKI12
TCLKI12
—
RDULR12
—
ADDP3
IJAE11
IJAPS11
IJAFDS11
IJAFLT11
ISCPD11
IAISEL11
—
SHLHS11
C9RSM2
C11RSM2
C13RSM2
C16RSM2
C9RSL2
C11RSL2
C13RSL2
C15RSL2
—
BEIR11
LVDS11
RCLKI11
TCLKI11
—
RDULR11
—
ADDP2
IJAE10
IJAPS10
IJAFDS10
IJAFLT10
ISCPD10
IAISEL10
—
SHLHS10
C9RSM1
C11RSM1
C13RSM1
C16RSM1
C9RSL1
C11RSL1
C13RSL1
C15RSL1
—
BEIR10
LVDS10
RCLKI10
TCLKI10
—
RDULR10
INTM
ADDP1
IJAE9
IJAPS9
IJAFDS9
IJAFLT9
ISCPD9
IAISEL9
—
SHLHS9
C9RSM0
C11RSM0
C13RSM0
C16RSM0
C9RSL0
C11RSL0
C13RSL0
C15RSL0
BERTE
BEIR9
LVDS9
RCLKI9
TCLKI9
—
RDULR9
CWE
ADDP0
IJAE
IJAPS
IJAFDS
IJAFLT
ISCPD
IAISEL
Not Used
SHLHS
RSMM1
RSMM2
RSMM3
RSMM4
RSL1
RSL2
RSL3
RSL4
BTCR
BEIR
LVDS
RCLKI
TCLKI
Not Used
RDULR
GISC
ADDP
20
21
22
23
24
25
26
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
3E
3F
46 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-8. BERT Register Bit Map
REGISTER
ADDRESS FOR
LIUS
RW
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
20
21
RW
—
PMUM
—
LPMU
—
RNPL
—
RPIC
—
MPR
—
APRD
—
TNPL
—
TPIC
—
02
03
04
22
23
24
RW
—
RW
—
—
BSP7
QRSS
—
BSP6
PTS
—
BSP5
PLF4
PTF4
BSP4
PLF3
PTF3
BSP3
PLF2
PTF2
BSP2
PLF1
PTF1
BSP1
PLF0
PTF0
BSP0
BSPR2
BSPR3
05
06
25
26
—
RW
BSP15
BSP23
BSP14
BSP22
BSP13
BSP21
BSP12
BSP20
BSP11
BSP19
BSP10
BSP18
BSP9
BSP17
BSP8
BSP16
BSPR4
TEICR
Not Used
07
08
09–0B
27
28
29–2B
—
RW
—
BSP31
—
—
BSP30
—
—
BSP29
TEIR2
—
BSP28
TEIR1
—
BSP27
TEIR0
—
BSP26
BEI
—
BSP25
TSEI
—
BSP24
MEIMS
—
BSR
Not Used
BSRL
0C
0D
0E
2C
2D
2E
R/W
—
RL/W
—
—
—
—
—
—
—
—
—
—
—
—
PMS
—
PMSL
—
—
BEL
BEC
—
BECL
OOS
—
OOSL
Not Used
BSRIE
0F
10
2F
30
—
RW
—
—
—
—
—
—
—
—
—
PMSIE
—
BEIE
—
BECIE
—
OOSIE
Not Used
RBECR1
RBECR2
11–13
14
15
31–33
34
35
—
R
R
—
BEC7
BEC15
—
BEC6
BEC14
—
BEC5
BEC13
—
BEC4
BEC12
—
BEC3
BEC11
—
BEC2
BEC10
—
BEC1
BEC9
—
BEC0
BEC8
RBECR3
Not Used
16
17
36
37
R
—
BEC23
—
BEC22
—
BEC21
—
BEC20
—
BEC19
—
BEC18
—
BEC17
—
BEC16
—
RBCR1
RBCR2
RBCR3
18
19
1A
38
39
3A
R
R
R
BC7
BC15
BC23
BC6
BC14
BC22
BC5
BC13
BC21
BC4
BC12
BC20
BC3
BC11
BC19
BC2
BC10
BC18
BC1
BC9
BC17
BC0
BC8
BC16
RBCR4
Not Used
1B
1C–1E
3B
3C–3E
R
—
BC31
—
BC30
—
BC29
—
BC28
—
BC27
—
BC26
—
BC25
—
BC24
—
ADDP
1F
3F
RW
ADDP7
ADDP6
ADDP5
ADDP4
ADDP3
ADDP2
ADDP1
ADDP0
1-8
9-16
BCR
Not Used
00
01
BPCR1
BPCR2
BSPR1
Note: Underlined bits are read only.
47 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
6.1
Register Description
This is the detailed register description of each bit. Whenever the variable “n” in italics is used in any of the register
descriptions, it represents 1–16. Note that in the register descriptions, there are duplicate registers for LIUs 1–8
and LIUs 9–16. There are registers in LIUs 1–8 that do not have a duplicate in the register set for LIUs 9–16. For
these registers, only one address is listed. All other registers list two addresses, one for LIUs 1–8 and one for LIUs
9–16.
6.1.1
Primary Register Bank
The ADDP register must be set to 00h to access this bank.
ID
ID Register
00h
Register Name:
Register Description:
Register Address:
Bit #
Name
7
ID7
6
ID6
5
ID5
4
ID4
3
ID3
2
ID2
1
ID1
0
ID0
Bits 7: Device CODE ID Bit 7 (ID7). This bit is ‘one’ for long-haul operation.
Bits 6 to 3: Device CODE ID Bits 6 to 3 (ID6 to ID3). These bits tell the user the number of ports the device
contains.
Bits 2 to 0: Device CODE ID Bits 2 to 0 (ID2 to ID0). These bits tell the user the revision of the part. Contact the
factory for details.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
ALBC8
0
6
ALBC7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
ALBC16
0
ALBC
Analog Loopback Control
01h
5
ALBC6
0
4
ALBC5
0
3
ALBC4
0
2
ALBC3
0
1
ALBC2
0
0
ALBC1
0
5
ALBC14
0
4
ALBC13
0
3
ALBC12
0
2
ALBC11
0
1
ALBC10
0
0
ALBC9
0
21h
6
ALBC15
0
Bit 7 to 0: Analog Loopback Control Bits Channel n (ALBCn). When this bit is set, LIUn is placed in Analog
Loopback. TTIP and TRING are looped back to RTIP and RRING. The data at RTIP and RRING is ignored. LOS
Detector is still in operation. The jitter attenuator is in use if enabled for the Transmitter or Receiver.
48 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
RLBC
Remote Loopback Control
02h
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RLBC8
0
6
RLBC7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RLBC16
0
5
RLBC6
0
4
RLBC5
0
3
RLBC4
0
2
RLBC3
0
1
RLBC2
0
0
RLBC1
0
5
RLBC14
0
4
RLBC13
0
3
RLBC12
0
2
RLBC11
0
1
RLBC10
0
0
RLBC9
0
22h
6
RLBC15
0
Bit 7 to 0: Remote Loopback Control Bits Channel n (RLBCn). When this bit is set, Remote Loopback is
enabled on LIUn. The Analog Received Signal goes through the Receive Digital and is looped back to the
Transmitter. The data at TPOS and TNEG is ignored. The jitter attenuator is in use if enabled.
TAOE
Transmit All Ones Enable
03h
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
TAOE8
0
6
TAOE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
5
TAOE6
0
4
TAOE5
0
3
TAOE4
0
2
TAOE3
0
1
TAOE2
0
0
TAOE1
0
23h
7
6
5
4
3
2
1
0
TAOE16
0
TAOE15
0
TAOE14
0
TAOE13
0
TAOE12
0
TAOE11
0
TAOE10
0
TAOE9
0
Bit 7 to 0: Transmit All Ones Enable Channel n (TAOEn). When this bit is set, continuous stream of All ones on
TTIP and TRING are sent on Channel n. MCLK is used as a reference clock for Transmit All Ones Signal. The data
arriving at TPOS and TNEG is ignored.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
LOS8
0
6
LOS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
LOS16
0
LOSS
Loss of Signal Status
04h
6
LOS15
0
5
LOS6
0
4
LOS5
0
3
LOS4
0
2
LOS3
0
1
LOS2
0
0
LOS1
0
5
LOS14
0
4
LOS13
0
3
LOS12
0
2
LOS11
0
1
LOS10
0
0
LOS9
0
24h
Bit 7 to 0: Loss of Signal Status Channel n (LOSn). When this bit is set, a LOS condition has been detected on
LIUn. The criteria and conditions of LOS are described in Section 5.5.5.
49 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
DFMS8
0
6
DFMS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
DFMS16
0
DFMS
Driver Fault Monitor Status
05h
5
DFMS6
0
4
DFMS5
0
3
DFMS4
0
2
DFMS3
0
1
DFMS2
0
0
DFMS1
0
5
DFMS14
0
4
DFMS13
0
3
DFMS12
0
2
DFMS11
0
1
DFMS10
0
0
DFMS9
0
25h
6
DFMS15
0
Bit 7 to 0: Driver Fault Monitor Status Channel n (DFMSn). When this bit is set, it indicates that there is a short
or open circuit at the Transmit Driver for LIUn.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
LOSIE8
0
6
LOSIE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
LOSIE16
0
LOSIE
Loss of Signal Interrupt Enable
06h
5
LOSIE6
0
4
LOSIE5
0
3
LOSIE4
0
2
LOSIE3
0
1
LOSIE2
0
0
LOSIE1
0
5
LOSIE14
0
4
LOSIE13
0
3
LOSIE12
0
2
LOSIE11
0
1
LOSIE10
0
0
LOSIE9
0
26h
6
LOSIE15
0
Bit 7 to 0: Loss of Signal Interrupt Enable Channel n (LOSIEn). When this bit is set, a change in LOS Status for
LIUn can generate an Interrupt.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
DFMIE8
0
6
DFMIE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
DFMIE16
0
DFMIE
Driver Fault Monitor Interrupt Enable
07h
5
DFMIE6
0
4
DFMIE5
0
3
DFMIE4
0
2
DFMIE3
0
1
DFMIE2
0
0
DFMIE1
0
5
DFMIE14
0
4
DFMIE13
0
3
DFMIE12
0
2
DFMIE11
0
1
DFMIE10
0
0
DFMIE9
0
27h
6
DFMIE15
0
Bit 7 to 0: Driver Fault Monitor Interrupt Enable Channel n (DFMIEn). When this bit is set, a change in DFM
Status can generate an Interrupt in Monitor n.
50 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
LOSIS8
0
6
LOSIS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
LOSIS16
0
LOSIS
Loss of Signal Interrupt Status
08h
5
LOSIS6
0
4
LOSIS5
0
3
LOSIS4
0
2
LOSIS3
0
1
LOSIS2
0
0
LOSIS1
0
5
LOSIS14
0
4
LOSIS13
0
3
LOSIS12
0
2
LOSIS11
0
1
LOSIS10
0
0
LOSIS9
0
28h
6
LOSIS15
0
Bit 7 to 0: Loss of Signal Interrupt Status Channel n (LOSISn). When this bit is set, it indicates a LOS status
has transition from a “0 to 1” or “1 to 0” and was detected for LIUn. The bit for LIUn is enabled by register LOSIE
(06h). This bit when latched is cleared on a read operation.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
DFMIS8
0
6
DFMIS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
DFMIS16
0
DFMIS
Driver Fault Monitor Interrupt Status
09h
5
DFMIS6
0
4
DFMIS5
0
3
DFMIS4
0
2
DFMIS3
0
1
DFMIS2
0
0
DFMIS1
0
5
DFMIS14
0
4
DFMIS13
0
3
DFMIS12
0
2
DFMIS11
0
1
DFMIS10
0
0
DFMIS9
0
29h
6
DFMIS15
0
Bit 7 to 0: Driver Fault Status Register Channel n (DFMISn). When this bit is set, it indicates a DFM status has
transitioned from “0 to 1” or “1 to 0” and was detected for LIUn. The bit for LIUn is enabled by register DFMIE (07h).
This bit when latched is cleared on a read operation.
51 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
SWR
Software Reset
0Ah
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
SWRL
0
6
SWRL
0
5
SWRL
0
4
SWRL
0
3
SWRL
0
2
SWRL
0
1
SWRL
0
0
SWRL
0
Bit 7 to 0: Software Reset (SWR). Whenever any write is performed to this register, at least 1 us reset will be
generated that resets the lower set of registers (LIUs 1-8). All the registers will be restored to their default values. A
read operation will always read back all zeros.
Register Address (LIUs 9-16):
Bit #
Name
Default
7
SWRU
0
2Ah
6
SWRU
0
5
SWRU
0
4
SWRU
0
3
SWRU
0
2
SWRU
0
1
SWRU
0
0
SWRU
0
Bit 7 to 0: Software Reset (SWR). Whenever any write is performed to this register, at least 1 us reset will be
generated that resets the upper set of registers (LIUs 9-16). All the registers will be restored to their default values.
A read operation will always read back all zeros.
GMC
G.772 Monitoring Control
0Bh
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
6
5
4
—
—
—
—
0
0
0
0
3
GMC3
0
2
GMC2
0
1
GMC1
0
0
GMC0
0
Bit 7 to 0: G.772 Monitoring Control (GMC). These bits are used to select transmitter or receiver for nonintrusive
monitoring. Receiver 1 is used to monitor channels 2 to 8 of one receiver from RTIP2-8/RRING2-8 or of one
transmitter from TTIP2-8/TRING2-8. See Table 6-9.
Register Address (LIUs 9-16):
Bit #
Name
Default
2Bh
7
6
5
4
—
—
—
—
0
0
0
0
3
GMC3
0
2
GMC2
0
1
GMC1
0
0
GMC0
0
Bit 7 to 0: G.772 Monitoring Control (GMC). These bits are used to select transmitter or receiver for nonintrusive
monitoring. Receiver 9 is used to monitor channels 10 to 16 of one receiver from RTIP10-16/RRING10-16 or of one
transmitter from TTIP10-16/TRING10-16. See Table 6-10
52 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-9. G.772 Monitoring Control (LIU 1)
GMC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
GMC2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
GMC1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
GMC0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SELECTION
No Monitoring
Receiver 2
Receiver 3
Receiver 4
Receiver 5
Receiver 6
Receiver 7
Receiver 8
No Monitoring
Transmitter 2
Transmitter 3
Transmitter 4
Transmitter 5
Transmitter 6
Transmitter 7
Transmitter 8
Table 6-10. G.772 Monitoring Control (LIU 9)
GMC3
GMC2
GMC1
GMC0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SELECTION
No Monitoring
Receiver 10
Receiver 11
Receiver 12
Receiver 13
Receiver 14
Receiver 15
Receiver 16
No Monitoring
Transmitter 10
Transmitter 11
Transmitter 12
Transmitter 13
Transmitter 14
Transmitter 15
Transmitter 16
53 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
DLBC8
0
6
DLBC7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
DLBC16
0
DLBC
Digital Loopback Control
0Ch
5
DLBC6
0
4
DLBC5
0
3
DLBC4
0
2
DLBC3
0
1
DLBC2
0
0
DLBC1
0
5
DLBC14
0
4
DLBC13
0
3
DLBC12
0
2
DLBC11
0
1
DLBC10
0
0
DLBC9
0
2Ch
6
DLBC15
0
Bit 7 to 0: Digital Loopback Control Channel n (DLBCn). When this bit is set the LIUn is placed in Digital
Loopback. The data at TPOS/TNEG is encoded and looped back to the decoder and output on RPOS/RNEG. The
Jitter Attenuator can optionally be included in the Transmit or Receive Paths.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
LASCS8
0
6
LASCS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
LASCS16
0
LASCS
LOS/AIS Criteria Selection
0Dh
5
LASCS6
0
4
LASCS5
0
3
LASCS4
0
2
LASCS3
0
1
LASCS2
0
0
LASCS1
0
5
LASCS14
0
4
LASCS13
0
3
LASCS12
0
2
LASCS11
0
1
LASCS10
0
0
LASCS9
0
2Dh
6
LASCS15
0
Bit 7 to 0: LOS/AIS Criteria Selection Channel n (LASCSn). This bit is used for LOS/AIS Selection Criteria for
LIUn. In E1 mode, if set it uses ETSI (300233) mode selections. If reset it uses G.775 criteria. In T1/J1 mode
T1.231 criteria is selected.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
ATAOS8
0
6
ATAOS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
ATAOS16
0
ATAOS
Automatic Transmit All Ones Select
0Eh
5
ATAOS6
0
4
ATAOS5
0
3
ATAOS4
0
2
ATAOS3
0
1
ATAOS2
0
0
ATAOS1
0
5
ATAOS14
0
4
ATAOS13
0
3
ATAOS12
0
2
ATAOS11
0
1
ATAOS10
0
0
ATAOS9
0
2Eh
6
ATAOS15
0
Bit 7 to 0: Automatic Transmit All Ones Select Channel n (ATAOSn). When this bit is set All Ones Signal is
sent if a Loss of Signal is detected for LIUn. “All Ones Signal” uses MCLK as the reference clock.
54 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
0
6
AISEL
0
GC
Global Configuration
0Fh
5
SCPD
0
4
CODE
0
3
JADS
0
2
RTCTL
0
1
JAPS
0
0
JAE
0
RIMPMS and RTCTL control all 16 LIUs. All other bits are for LIUs 1-8 only.
Bit 6: AIS Enable During Loss (AISEL). When this bit is set, an AIS is sent to the System Side upon detecting
LOS for each channel. The individual LIU Register IAISEL settings will be ignored when this bit is set. When reset,
the IAISEL register will have control.
Bit 5: Short Circuit Protection Disable (SCPD). If this bit is set the Short Circuit protection is disabled for all the
transmitters. The individual LIU Register ISCPD settings will be ignored when this bit is set. When reset, the ISCPD
register will have control.
Bit 4: Code. If this bit is set AMI encoder/decoder is selected. The LCS register settings will be ignored when this
bit is set. If reset, the LCS register will have control.
Bit 3: Jitter Attenuator Depth Select (JADS). If this bit is set the jitter attenuator FIFO depth is 128 bits. The
settings in the IJAFDS register will be ignored if this register is set. If reset the IJAFDS register will have control.
Bit 2: Receive Termination Control (RTCTL). If this bit is set the OE pin has been granted control over all the
internal impedance matching of all the LIU Receivers. Otherwise, see the RIMPON bit.
Bit 1: Jitter Attenuator Position Select (JAPS). When the JAPS bit is set high, the JA will be in the Receive path
and when default or set low in the Transmit path. These settings can be changed for an individual LIU by settings in
Register IJAPS. Note that when bit JAE is set, the settings in Register IJAPS will be ignored.
Bit 0: Jitter Attenuator Enable (JAE). When this bit is set the JA is enabled. The settings in the IJAE register will
be ignored if this register is set. If reset, the IJAE register will have control.
55 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
AISEL
0
2Fh
5
SCPD
0
4
CODE
0
3
JADS
0
2
—
0
1
JAPS
0
0
JAE
0
Bit 6: AIS Enable During Loss (AISEL). When this bit is set, an AIS is sent to the System Side upon detecting
LOS for each channel. The individual LIU Register IAISEL settings will be ignored when this bit is set. When reset,
the IAISEL register will have control.
Bit 5: Short Circuit Protection Disable (SCPD). If this bit is set the Short Circuit protection is disabled for all the
transmitters. The individual LIU Register ISCPD settings will be ignored when this bit is set. When reset, the ISCPD
register will have control.
Bit 4: Code. If this bit is set AMI encoder/decoder is selected. The LCS register settings will be ignored when this
bit is set. If reset, the LCS register will have control.
Bit 3: Jitter Attenuator Depth Select (JADS). If this bit is set the jitter attenuator FIFO depth is 128 bits. The
settings in the IJAFDS register will be ignored if this register is set. If reset the IJAFDS register will have control.
Bit 1: Jitter Attenuator Position Select (JAPS). When the JAPS bit is set high, the JA will be in the Receive path
and when default or set low in the Transmit path. These settings can be changed for an individual LIU by settings in
Register IJAPS. Note that when bit JAE is set, the settings in Register IJAPS will be ignored.
Bit 0: Jitter Attenuator Enable (JAE). When this bit is set the JA is enabled. The settings in the IJAE register will
be ignored if this register is set. If reset, the IJAE register will have control.
56 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
TST
Template Select Transmitter Register
10h
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
6
5
4
3
—
—
—
—
—
0
0
0
0
0
2
TST2
0
1
TST1
0
0
TST0
0
Bit 2 to 0: TST Template Select Transceiver [2:0] (TST [2:0]). TST[2:0] is used to select the Transceiver that the
Transmit Template Select Register (hex 11) applies to for LIUs 1-8. See .
Register Address (LIUs 9-16):
Bit #
Name
Default
7
30h
6
—
5
—
0
—
0
4
3
—
0
—
0
0
2
TST2
0
1
TST1
0
0
TST0
0
Bit 2 to 0: TST Template Select Transceiver [2:0] (TST [2:0]). TST[2:0] is used to select the Transceiver that the
Transmit Template Select Register (hex 11) applies to LIUs 9-16. See Table 6-13.
Table 6-12. TST Template Select Transmitter Register
TST[2:0]
000
001
010
011
CHANNEL
1
2
3
4
TST[2:0]
100
101
110
111
CHANNEL
5
6
7
8
Table 6-13. TST Template Select Transmitter Register
TST[2:0]
000
001
010
011
CHANNEL
9
10
11
12
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RIMPON
0
TST[2:0]
100
101
110
111
CHANNEL
13
14
15
16
TS
Template Select Register
11h
31h
6
TIMPOFF
0
5
4
—
—
0
0
3
TIMPRM
0
2
TS2
0
1
TS1
0
0
TS0
0
Bit 7: Receive Impedance Match On (RIMPON). If this bit is set Receive Impedance matching is turned ON.
Otherwise the receiver is in High Z. Note that the OE pin can have control instead of this bit when the GC.RTCTL
bit is set.
57 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Bit 6: Transmit Impedance Termination Off (TIMPOFF). If this bit is set all the internal Transmit Terminating
Impedance is turned Off.
Bit 3: Transmit Impedance Receive Match (TIMPRM). This bit selects the internal Transmit Termination
impedance and Receive Impedance Match for E1 mode and T1/J1 mode.
0 = 75 W for E1 mode or 100 W for T1 mode.
1 = 120 W for E1 mode or 110 W for J1 mode.
Bit 2 to 0: Template Selection [2:0] (TS[2:0]). Bits TS[2:0] are used to select E1 or T1/J1 mode, the template,
and the settings for various cable lengths. The impedance termination for the transmitter and impedance match for
the receiver are specified by bit TIMPRM. Short-haul or long-haul operation is selected by the SHLHS bit in the
individual registers SHLHS (07). See Table 6-14 for bit selection of TS[2:0].
Table 6-14. Template Selection
TS[2:0]
011
100
101
110
111
000
001 and 010
011
100
101
110
TEMPLATE SELECTION
IMPEDANCE
CABLE LOSS
LINE LENGTH (ft)
(dB)
(W)
0–133 ABAM
0.6
100/110
133–266 ABAM
1.2
100/110
266–399 ABAM
1.8
100/110
399–533 ABAM
2.4
100/110
533–655 ABAM
3.0
100/110
G.703 coaxial and twisted pair cable
75/120
—
—
Reserved
—
100/110
0db CSU
—
100/110
-7.5dB CSU
—
100/110
-15dB CSU
—
100/110
-22.5dB CSU
58 of 115
OPERATION MODE
T1/J1 Short Haul
T1 Short Haul
T1 Short Haul
T1 Short Haul
T1 Short Haul
E1 Short/Long Haul
Short/Long Haul
T1/J1 Long Haul
T1/J1 Long Haul
T1/J1 Long Haul
T1/J1 Long Haul
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
OE8
0
6
OE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
OE16
0
OE
Output Enable
12h
5
OE6
0
4
OE5
0
3
OE4
0
2
OE3
0
1
OE2
0
0
OE1
0
5
OE14
0
4
OE13
0
3
OE12
0
2
OE11
0
1
OE10
0
0
OE9
0
32h
6
OE15
0
Bit 7 to 0: Output Enable Channel n (OEn). When this bit is in default the Transmitter output for LIUn is high
impedance. When this bit is set the Transmitter output for LIUn is enabled. Note that the OE pin will override this
setting when low.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
AIS8
0
6
AIS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
AIS16
0
AIS
Alarm Indication Signal Status
13h
6
AIS15
0
5
AIS6
0
4
AIS5
0
3
AIS4
0
2
AIS3
0
1
AIS2
0
0
AIS1
0
5
AIS14
0
4
AIS13
0
3
AIS12
0
2
AIS11
0
1
AIS10
0
0
AIS9
0
33h
Bit 7 to 0: Alarm Indication Signal Channel n (AISn). This bit will be set when AIS is detected for LIUn. The
criteria for AIS selection is detailed in AIS Section. The selection of the AIS criteria is done by settings in LASCS
(0D) Register.
59 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
AISIE8
0
6
AISIE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
AISIE16
0
AISIE
AIS Interrupt Enable
14h
5
AISIE6
0
4
AISIE5
0
3
AISIE4
0
2
AISIE3
0
1
AISIE2
0
0
AISIE1
0
5
AISIE14
0
4
AISIE13
0
3
AISIE12
0
2
AISIE11
0
1
AISIE10
0
0
AISIE9
0
34h
6
AISIE15
0
Bit 7 to 0: AIS Interrupt Mask Channel n (AISIEn). When this bit is set interrupts can be generated for LIUn if AIS
Status transitions.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
AISI8
0
6
AISI7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
AISI16
0
AISI
AIS Interrupt
15h
6
AISI15
0
5
AISI6
0
4
AISI5
0
3
AISI4
0
2
AISI3
0
1
AISI2
0
0
AISI1
0
5
AISI14
0
4
AISI13
0
3
AISI12
0
2
AISI11
0
1
AISI10
0
0
AISI9
0
35h
Bit 7 to 0: AIS Interrupt Channel n (AISIn). This bit is set when AIS Transitions from a “0 to 1” or “1 to 0” and
Interrupts are enabled by AISIE(14) register for LIUn. This bit if set, is cleared on a read operation or when the
interrupt enable register is disabled.
60 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
ADDP
Address Pointer
1Fh
3Fh
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
ADDP7
0
6
ADDP6
0
5
ADDP5
0
4
ADDP4
0
3
ADDP3
0
2
ADDP2
0
1
ADDP1
0
0
ADDP0
0
Bit 7 to 0: Address Pointer (ADDP). This pointer is used to switch between pointing to the Primary Registers, the
Secondary Registers, Individual Registers, and BERT Registers. See Table 6-15 for bank selection. The register
space contains control for channels 1 to 8 from address 00 hex to 1F hex and a duplicate set of registers for control
of channels 9 to 16 from address 20 hex to 3F hex. The ADDP at address 1F hex select the banks for the set of
registers for LIUs 1-8. The ADDP register at address 3F select the banks for the set of registers for LIUs 9-16.
Table 6-15. Address Pointer Bank Selection
ADDP7 TO ADDP0
(HEX)
00
AA
01
02
6.1.2
BANK NAME
Primary Bank
Secondary Bank
Individual LIU Bank
BERT Bank
Secondary Register Bank
The ADDP register must be set to AAh in order to access this bank.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
SRMS8
0
6
SRMS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
SRMS16
0
SRMS
Single-Rail Mode Select
00h
5
SRMS6
0
4
SRMS5
0
3
SRMS4
0
2
SRMS3
0
1
SRMS2
0
0
SRMS1
0
5
SRMS14
0
4
SRMS13
0
3
SRMS12
0
2
SRMS11
0
1
SRMS10
0
0
SRMS9
0
20h
6
SRMS15
0
Bit 7 to 0: Single-Rail Mode Select Channel n (SRMSn). When this bit is set single-rail mode is selected for the
System Transmit and Receive n. If this bit is reset dual rail is selected.
61 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
LCS8
0
6
LCS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
LCS16
0
LCS
Line Code Selection
01h
5
LCS6
0
4
LCS5
0
3
LCS4
0
2
LCS3
0
1
LCS2
0
0
LCS1
0
5
LCS14
0
4
LCS13
0
3
LCS12
0
2
LCS11
0
1
LCS10
0
0
LCS9
0
21h
6
LCS15
0
Bit 7 to 0: Line Code Select Channel n (LCSn). When this bit is set AMI encoding/decoding is selected for LIUn.
If reset B8ZS or HDB3 encoding/decoding is selected for LIUn. Note that if the GC.CODE register bit is set it will
ignore this register.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RPDE8
0
6
RPDE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RPDE16
0
RPDE
Receive Power-Down Enable
03h
5
RPDE6
0
4
RPDE5
0
3
RPDE4
0
2
RPDE3
0
1
RPDE2
0
0
RPDE1
0
5
RPDE14
0
4
RPDE13
0
3
RPDE12
0
2
RPDE11
0
1
RPDE10
0
0
RPDE9
0
23h
6
RPDE15
0
Bit 7 to 0: Receive Power-Down Enable Channel n (RPDEn). When this bit is set the Receiver for LIUn is
powered down.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
TPDE8
0
6
TPDE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
TPDE16
0
TPDE
Transmit Power-Down Enable
04h
5
TPDE6
0
4
TPDE5
0
3
TPDE4
0
2
TPDE3
0
1
TPDE2
0
0
TPDE1
0
5
TPDE14
0
4
TPDE13
0
3
TPDE12
0
2
TPDE11
0
1
TPDE10
0
0
TPDE9
0
24h
6
TPDE15
0
Bit 7 to 0: Transmit Power-Down Enable Channel n (TPDEn). When this bit is set the Transmitter for LIUn is
powered down.
62 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
EXZDE8
0
6
EXZDE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
EXZDE16
0
EZDE
Excessive Zero Detect Enable
05h
5
EXZDE6
0
4
EXZDE5
0
3
EXZDE4
0
2
EXZDE3
0
1
EXZDE2
0
0
EXZDE1
0
5
EXZDE14
0
4
EXZDE13
0
3
EXZDE12
0
2
EXZDE11
0
1
EXZDE10
0
0
EXZDE9
0
25h
6
EXZDE15
0
Bit 7 to 0: Excessive Zero Detect Enable Channel n (EZDEn). When this bit is reset Excessive Zero detection is
disabled for LIUn. When this bit is set Excessive Zero Detect Enable is enabled. Excessive Zero Detection is only
relevant in single-rail mode with HDB3 or B8ZS encoding.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
CVDEB8
0
6
CVDEB7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
CVDEB16
0
CVDEB
Code Violation Detect Enable Bar
06h
5
CVDEB6
0
4
CVDEB5
0
3
CVDEB4
0
2
CVDEB3
0
1
CVDEB2
0
0
CVDEB1
0
5
CVDEB14
0
4
CVDEB13
0
3
CVDEB12
0
2
CVDEB11
0
1
CVDEB10
0
0
CVDEB9
0
26h
6
CVDEB15
0
Bit 7 to 0: Code Violation Detect Enable Bar Channel n (CVDEBn). If this bit is set, code violation detection is
disabled for the LIUn. If this bit is reset, code violation detection is enabled. Code violation detection is only
relevant in single-rail mode with HDB3 encoding.
63 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
6.1.3
Individual LIU Register Bank
The ADDP register must be set to 01h to access this bank.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
IJAE8
0
6
IJAE7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
IJAE16
0
IJAE
Individual Jitter Attenuator Enable
00h
5
IJAE6
0
4
IJAE5
0
3
IJAE4
0
2
IJAE3
0
1
IJAE2
0
0
IJAE1
0
5
IJAE14
0
4
IJAE13
0
3
IJAE12
0
2
IJAE11
0
1
IJAE10
0
0
IJAE9
0
20h
6
IJAE15
0
Bit 7-0: Individual Jitter Attenuator Enable Channel n (IJAEn). When this bit is set, the LIU Jitter Attenuator n is
Enabled. Note that if the GC.JAE register bit is set this register will be ignored.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
IJAPS8
0
6
IJAPS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
IJAPS16
0
IJAPS
Individual Jitter Attenuator Position Select
01h
5
IJAPS6
0
4
IJAPS5
0
3
IJAPS4
0
2
IJAPS3
0
1
IJAPS2
0
0
IJAPS1
0
5
IJAPS14
0
4
IJAPS13
0
3
IJAPS12
0
2
IJAPS11
0
1
IJAPS10
0
0
IJAPS9
0
21h
6
IJAPS15
0
Bit 7-0: Individual Jitter Attenuator Position Select Channel n (IJAPSn). When this bit is set high the JA is in
the Receive path n, and when this bit is default or set low then the JA is in the Transmit path n. Note that if the
GC.JAE register bit is set, this register will be ignored.
64 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
IJAFDS8
0
6
IJAFDS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
IJAFDS16
0
IJAFDS
Individual Jitter Attenuator Fifo Depth Select
02h
5
IJAFDS6
0
4
IJAFDS5
0
3
IJAFDS4
0
2
IJAFDS3
0
1
IJAFDS2
0
0
IJAFDS1
0
5
IJAFDS14
0
4
IJAFDS13
0
3
IJAFDS12
0
2
IJAFDS11
0
1
IJAFDS10
0
0
IJAFDS9
0
22h
6
IJAFDS15
0
Bit 7-0: Individual Jitter Attenuator Fifo Depth Select n (IJAFDSn). When this bit is set for LIUn the JA Fifo
depth will be 128 bits. When reset the JA FIFO depth will be 32 bits. Note that if the GC.IJAFDS register bit is set
this register will be ignored.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
IJAFLT8
0
6
IJAFLT7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
IJAFLT16
0
IJAFLT
Individual Jitter Attenuator FIFO Limit Trip
03h
5
IJAFLT6
0
4
IJAFLT5
0
3
IJAFLT4
0
2
IJAFLT3
0
1
IJAFLT2
0
0
IJAFLT1
0
5
IJAFLT14
0
4
IJAFLT13
0
3
IJAFLT12
0
2
IJAFLT11
0
1
IJAFLT10
0
0
IJAFLT9
0
23h
6
IJAFLT15
0
Bit 7 to 0: Individual Jitter Attenuator FIFO Limit Trip n (IJAFLTn). Set when the jitter attenuator FIFO reaches
to within 4 bits of its useful limit for Transmitter n. This bit will be cleared when read.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
ISCPD8
0
6
ISCPD7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
ISCPD16
0
ISCPD
Individual Short-Circuit Protection Disabled
04h
5
ISCPD6
0
4
ISCPD5
0
3
ISCPD4
0
2
ISCPD3
0
1
ISCPD2
0
0
ISCPD1
0
5
ISCPD14
0
4
ISCPD13
0
3
ISCPD12
0
2
ISCPD11
0
1
ISCPD10
0
0
ISCPD9
0
24h
6
ISCPD15
0
Bit 7-0: Individual Short-Circuit Protection Disable n. (ISCPDn). When this bit is set the Short Circuit protection
is disabled for the individual Transmitter n. Note that if the GC.SCPD register bit is set, the settings in this register
will be ignored.
65 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
IAISEL8
0
6
IAISEL7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
IAISEL16
0
IAISEL
Individual AIS Select
05h
5
IAISEL6
0
4
IAISEL5
0
3
IAISEL4
0
2
IAISEL3
0
1
IAISEL2
0
0
IAISEL1
0
5
IAISEL14
0
4
IAISEL13
0
3
IAISEL12
0
2
IAISEL11
0
1
IAISEL10
0
0
IAISEL9
0
25h
6
IAISEL15
0
Bit 7-0: Individual AIS Enable During Loss n (IAISELn). When this bit is set Individual AIS Enable During loss is
enabled for the individual Receiver n and AIS is sent to the system side upon detection a LOS of signal. Note that if
the GC.AISEL register bit is set, the settings in this register will be ignored.
MC
Master Clock Select
06h
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
7
PCLKI1
0
6
PCLKI0
0
5
TECLKE
0
4
CLKAE
0
3
MPS1
0
2
MPS0
0
1
FREQS
0
0
PLLE
0
Bit 7 to 6: PLL Clock Input [1:0] (PCLKI[1:0]). These bits select the input into to the PLL.
00 MCLK is used.
01 RCLK1 to 8 is used based on the selection in register CCR.
10 RCLK9 to 16 is used based on the selection in register CCR.
11 Reserved.
Bit 5: T1/E1 Clock Enable (TECLKE). When this bit is set the TECLK output is enabled. If not set TECLK will be
disabled and the TECLK output is a LOS output. TECLK requires PLLE to be set for correct functionality.
Bit 4: Clock A Enable (CLKAE). When this bit is set the CLKA output is enabled. If not set CLKA will be disabled
and the CLKA output is a LOS output. CLKA requires PLLE to be set for correct functionality.
Bit 3 to 2: Master Period Select [1:0] (MPS[1:0]). These bits MPS[1:0] selects the external MCLK frequency for
the DS26334. See Table 6-16 for details. This register when written to will also controller functionality of channels 9
to 16.
Bit 1: Frequency Select(FREQS). In conjunction with MPS[1:0] selects the external MCLK frequency for the
DS26334. If this bit is set the external Master clock can be 1.544 MHz or multiple thereof. If not set the external
master clock can be 2.048 MHz or multiple thereof. See Table 6-16 for details. This register when written to will
also controller functionality of channels 9 to 16.
Bit 0: Phase Lock Loop Enable(PLLE). When this bit is set the phase lock loop is enabled. If not set MCLK will
be the applied input clock.
66 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-16. DS26334 MCLK Selections
PLLE
MPS1, MPS0
0
0
1
1
1
1
1
1
1
1
xx
xx
00
01
10
11
00
01
10
11
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
SHLHS8
0
7
SHLHS16
0
FREQS
MODE
x
x
1
1
1
1
0
0
0
0
T1
E1
T1/J1 or E1
T1/J1 or E1
T1/J1 or E1
T1/J1 or E1
T1/J1 or E1
T1/J1 or E1
T1/J1 or E1
T1/J1 or E1
SHLHS
Short-Haul/Long-Haul Select
07h
6
SHLHS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
MCLK,
MHz ±50ppm
1.544
2.048
1.544
3.088
6.176
12.352
2.048
4.096
8.192
16.384
5
SHLHS6
0
4
SHLHS5
0
3
SHLHS4
0
2
SHLHS3
0
1
SHLHS2
0
0
SHLHS1
0
5
SHLHS14
0
4
SHLHS13
0
3
SHLHS12
0
2
SHLHS11
0
1
SHLHS10
0
0
SHLHS9
0
27h
6
SHLHS15
0
Bit 7-0: Short-Haul/Long-Haul Select n. (SHLHSn). When this bit is set the long-haul mode is enabled for the
individual Transmitter n.
67 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RTR2
0
RSMM1
Receive Sensitivity Monitor Mode 1
08h
6
C2RSM2
0
5
C2RSM1
0
4
C2RSM0
0
3
RTR1
0
2
C1RSM2
0
1
C1RSM1
0
0
C1RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 2(RTR2). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS2). Note that in order to use receive internal impedance termination, a 1:1 transformer must be used
and this bit must be set to 1.
Bit 6 to 4: Channel 2 Receive Sensitivity/Monitor Select [2:0] (C2RSM[2:0]). When bits C2RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 1(RTR1). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS1).
Bit 2 to 0: Channel 1 Receive Sensitivity/Monitor Select [2:0] (C1RSM[2:0]). When bits C1RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RTR10
0
28h
6
C10RSM2
0
5
C10RSM1
0
4
C10RSM0
0
3
RTR9
0
2
C9RSM2
0
1
C9RSM1
0
0
C9RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 10(RTR10). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS10). Note that in order to use receive internal impedance termination, a 1:1 transformer must be
used and this bit must be set to 1.
Bit 6 to 4: Channel 10 Receive Sensitivity/Monitor Select [2:0] (C10RSM[2:0]). When bits C10RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 9(RTR9). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS9).
Bit 2 to 0: Channel 9 Receive Sensitivity/Monitor Select [2:0] (C9RSM[2:0]). When bits C9RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
68 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RTR4
0
RSMM2
Receive Sensitivity Monitor Mode 2
09h
6
C4RSM2
0
5
C4RSM1
0
4
C4RSM0
0
3
RTR3
0
2
C3RSM2
0
1
C3RSM1
0
0
C3RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 4(RTR4). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS4). Note that in order to use receive internal impedance termination, a 1:1 transformer must be used
and this bit must be set to 1.
Bit 6 to 4: Channel 4 Receive Sensitivity/Monitor Select [2:0] (C4RSM[2:0]). When bits C4RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 3(RTR3). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS3).
Bit 2 to 0: Channel 3 Receive Sensitivity/Monitor Select [2:0] (C3RSM[2:0]). When bits C3RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RTR12
0
29h
6
C12RSM2
0
5
C12RSM1
0
4
C12RSM0
0
3
RTR11
0
2
C11RSM2
0
1
C11RSM1
0
0
C11RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 12(RTR12). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS12). Note that in order to use receive internal impedance termination, a 1:1 transformer must be
used and this bit must be set to 1.
Bit 6 to 4: Channel 12 Receive Sensitivity/Monitor Select [2:0] (C12RSM[2:0]). When bits C12RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 11(RTR11). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS11).
Bit 2 to 0: Channel 11 Receive Sensitivity/Monitor Select [2:0] (C11RSM[2:0]). When bits C11RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
69 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RTR6
0
RSMM3
Receive Sensitivity Monitor Mode 3
0Ah
6
C6RSM2
0
5
C6RSM1
0
4
C6RSM0
0
3
RTR5
0
2
C5RSM2
0
1
C5RSM1
0
0
C5RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 6(RTR6). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS6). Note that in order to use receive internal impedance termination, a 1:1 transformer must be used
and this bit must be set to 1.
Bit 6 to 4: Channel 6 Receive Sensitivity/Monitor Select [2:0] (C6RSM[2:0]). When bits C6RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 5(RTR5). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS5).
Bit 2 to 0: Channel 5 Receive Sensitivity/Monitor Select [2:0] (C5RSM[2:0]). When bits C5RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RTR14
0
2Ah
6
C14RSM2
0
5
C14RSM1
0
4
C14RSM0
0
3
RTR13
0
2
C13RSM2
0
1
C13RSM1
0
0
C13RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 14(RTR14). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS14). Note that in order to use receive internal impedance termination, a 1:1 transformer must be
used and this bit must be set to 1.
Bit 6 to 4: Channel 14 Receive Sensitivity/Monitor Select [2:0] (C14RSM[2:0]). When bits C14RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 13(RTR13). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS13).
Bit 2 to 0: Channel 13 Receive Sensitivity/Monitor Select [2:0] (C13RSM[2:0]). When bits C13RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
70 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RTR8
0
RSMM4
Receive Sensitivity Monitor Mode 4
0Bh
6
C8RSM2
0
5
C8RSM1
0
4
C8RSM0
0
3
RTR7
0
2
C7RSM2
0
1
C7RSM1
0
0
C7RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 8(RTR8). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS8). Note that in order to use receive internal impedance termination, a 1:1 transformer must be used
and this bit must be set to 1.
Bit 6 to 4: Channel 8 Receive Sensitivity/Monitor Select [2:0] (C8RSM[2:0]). When bits C8RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 7(RTR7). If this bit is set the Turns Ratio is 1:1 on the receiver
side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul
mode (SHLHS7).
Bit 2 to 0: Channel 7 Receive Sensitivity/Monitor Select [2:0] (C7RSM[2:0]). When bits C7RSM[2:0] are used
to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RTR16
0
2Bh
6
C16RSM2
0
5
C16RSM1
0
4
C16RSM0
0
3
RTR15
0
2
C15RSM2
0
1
C15RSM1
0
0
C15RSM0
0
Bit 7: Receiver Transformer Turns Ratio Channel 16(RTR16). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS16). Note that in order to use receive internal impedance termination, a 1:1 transformer must be
used and this bit must be set to 1.
Bit 6 to 4: Channel 16 Receive Sensitivity/Monitor Select [2:0] (C16RSM[2:0]). When bits C16RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
Bit 3: Receiver Transformer Turns Ratio Channel 15(RTR15). If this bit is set the Turns Ratio is 1:1 on the
receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS15).
Bit 2 to 0: Channel 15 Receive Sensitivity/Monitor Select [2:0] (C15RSM[2:0]). When bits C15RSM[2:0] are
used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-17.
71 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-17. Receiver Sensitivity/Monitor Mode Gain Selection
RECEIVER
MONITOR
MODE
DISABLED
CNRSM [2:0],
T1/ E1 MODE
No flat gain
No flat gain
No flat gain
000
001
010
No flat gain
011
Receiver
monitor mode
enabled
Flat gain
Flat gain
Flat gain
Flat gain
CnRSM [2:0]
Max cable loss
100
101
110
111
30
22.5
17.5
12
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
RECEIVER
SENSITIVITY
(MAXIMUM
LOSS)
(dB)
12
18
30
36 for T1, 43
for E1
7
C2RSL3
0
RECEIVER
MONITOR
MODE GAIN
SETTINGS
(dB)
0
0
0
0
LOSS
DECLARATION
LEVEL
(dB)
15
21
33
39 for T1,46 for
E1
Receiver
monitor mode
gain settings
14
20
26
32
37
45.5
47.5
47
RSL1
Receive Signal Level Indicator 1
0Ch
6
C2RSL2
0
5
C2RSL1
0
4
C2RSL0
0
3
C1RSL3
0
2
C1RSL2
0
1
C1RSL1
0
0
C1RSL0
0
Bit 7 to 4: Channel 2 Receive Signal Level [3:0] (C2RSL[3:0]). C2RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Bit 3 to 0: Channel 1 Receive Signal Level [3:0] (C1RSL[3:0]). C1RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Register Address (LIUs 9-16):
Bit #
Name
Default
7
C10RSL3
0
2Ch
6
C10RSL2
0
5
C10RSL1
0
4
C10RSL0
0
3
C9RSL3
0
2
C9RSL2
0
1
C9RSL1
0
0
C9RSL0
0
Bit 7 to 4: Channel 10 Receive Signal Level [3:0] (C10RSL[3:0]). C10RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
Bit 3 to 0: Channel 9 Receive Signal Level [3:0] (C9RSL[3:0]). C9RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
72 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-18. Receiver Signal Level
CnRSL3 to
CnRSL0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
RECEIVE LEVEL (dB)
T1
E1
>-2.5
>-2.5
-2.5 to –5
-2.5 to –5
-5 to –7.5
-5 to –7.5
-7.5 to –10
-7.5 to –10
-10 to –12.5
-10 to –12.5
-12.5 to –15
-12.5 to –15
-15 to –17.5
-15 to –17.5
-17.5 to –20
-17.5 to –20
-20 to –22.5
-20 to –22.5
-22.5 to –25
-22.5 to –25
-25 to –27.5
-25 to –27.5
-27.5 to –30
-27.5 to –30
-30 to –34
-30 to –34
<-34
-34 to –38
—
-38 to –43
—
<-43
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
C4RSL3
0
RSL2
Receive Signal Level Indicator 2
0Dh
6
C4RSL2
0
5
C4RSL1
0
4
C4RSL0
0
3
C3RSL3
0
2
C3RSL2
0
1
C3RSL1
0
0
C3RSL0
0
Bit 7 to 4: Channel 4 Receive Signal Level [3:0] (C4RSL[3:0]). C4RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Bit 3 to 0: Channel 3 Receive Signal Level [3:0] (C3RSL[3:0]). C3RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Register Address (LIUs 9-16):
Bit #
Name
Default
7
C12RSL3
0
2Dh
6
C12RSL2
0
5
C12RSL1
0
4
C12RSL0
0
3
C11RSL3
0
2
C11RSL2
0
1
C11RSL1
0
0
C11RSL0
0
Bit 7 to 4: Channel 12 Receive Signal Level [3:0] (C12RSL[3:0]). C12RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
Bit 3 to 0: Channel 11 Receive Signal Level [3:0] (C11RSL[3:0]). C11RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
73 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
C6RSL3
0
RSL3
Receive Signal Level Indicator 3
0Eh
6
C6RSL2
0
5
C6RSL1
0
4
C6RSL0
0
3
C5RSL3
0
2
C5RSL2
0
1
C5RSL1
0
0
C5RSL0
0
Bit 7 to 4: Channel 6 Receive Signal Level [3:0] (C6RSL[3:0]). C6RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Bit 3 to 0: Channel 5 Receive Signal Level [3:0] (C5RSL[3:0]). C5RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Register Address (LIUs 9-16):
Bit #
Name
Default
7
C14RSL3
0
2Eh
6
C14RSL2
0
5
C14RSL1
0
4
C14RSL0
0
3
C13RSL3
0
2
C13RSL2
0
1
C13RSL1
0
0
C13RSL0
0
Bit 7 to 4: Channel 14 Receive Signal Level [3:0] (C14RSL[3:0]). C14RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
Bit 3 to 0: Channel 13 Receive Signal Level [3:0] (C13RSL[3:0]). C13RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
C8RSL3
0
RSL4
Receive Signal Level Indicator 4
0Fh
6
C8RSL2
0
5
C8RSL1
0
4
C8RSL0
0
3
C7RSL3
0
2
C7RSL2
0
1
C7RSL1
0
0
C7RSL0
0
Bit 7 to 4: Channel 8 Receive Signal Level [3:0] (C8RSL[3:0]). C8RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Bit 3 to 0: Channel 7 Receive Signal Level [3:0] (C7RSL[3:0]). C7RSL[3:0] bits provide the Receive Signal Level
as shown in Table 6-18..
Register Address (LIUs 9-16):
Bit #
Name
Default
7
C16RSL3
0
2Fh
6
C16RSL2
0
5
C16RSL1
0
4
C16RSL0
0
3
C15RSL3
0
2
C15RSL2
0
1
C15RSL1
0
0
C15RSL0
0
Bit 7 to 4: Channel 16 Receive Signal Level [3:0] (C16RSL[3:0]). C16RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
Bit 3 to 0: Channel 15 Receive Signal Level [3:0] (C15RSL[3:0]). C15RSL[3:0] bits provide the Receive Signal
Level as shown in Table 6-18..
74 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
BTS2
0
BTCR
Bit Error Rate Tester Control Register
10h
6
BTS1
0
5
BTS0
0
4
-0
3
-0
2
-0
1
-0
0
BERTE
0
This register enables the LIU1-8 BERT. The BERT can only connect to one LIU at a time. The LIU1-8 BERT operates
independently of the LIU9-16 BERT.
Bit 7 to 5: Bit Error Rate Transceiver Select [2:0] (BTS[2:0]) These bits BTS[2:0] select the LIU that the BERT
applies too (see Table 6-19). This is only applicable if the BERTE bit is set.
Bit 0: Bit Error Rate Tester Enable (BERTE). When this bit is set and 2mseconds have past, the Bit Error Rate
Tester (BERT) will be enabled. The BERT Register Set should be written and read to only after being enabled. The
BERT is only active for one LIU at a time selected by BTS[2:0]. This bit also forces the part into single-rail mode
with HDB3/B8ZS encoding enabled.
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BTS2
0
6
BTS1
0
30h
5
BTS0
0
4
—
0
3
—
0
2
—
0
1
—
0
0
BERTE
0
This register enables the LIU9-16 BERT. The BERT can only connect to one LIU at a time. The LIU9-16 BERT operates
independently of the LIU1-8 BERT.
Bit 7 to 5: Bit Error Rate Transceiver Select [2:0] (BTS[2:0]) These bits BTS[2:0] select the LIU that the BERT
applies too (see Table 6-20). This is only applicable if the BERTE bit is set.
Bit 0: Bit Error Rate Tester Enable (BERTE). When this bit is set and 2mseconds have past, the Bit Error Rate
Tester (BERT) will be enabled. The BERT Register Set should be written and read to only after being enabled. The
BERT is only active for one LIU at a time selected by BTS[2:0]. This bit also forces the part into single-rail mode
with HDB3/B8ZS encoding enabled.
75 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-19. Bit Error Rate Transceiver Select for Channels 1–8
REGISTER
ADDRESS
10h
10h
10h
10h
10h
10h
10h
10h
BTS2
BTS1
BTS0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
CHANNEL BERT
APPLIES TO
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Table 6-20. Bit Error Rate Transceiver Select for Channels 9–16
REGISTER
ADDRESS
30h
30h
30h
30h
30h
30h
30h
30h
BTS2
BTS1
BTS0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
BEIR8
0
Bit #
Name
Default
7
BEIR16
0
BEIR
BPV Error Insertion Register
11h
6
BEIR7
0
Register Address (LIUs 9-16):
6
BEIR15
0
CHANNEL BERT
APPLIES TO
Channel 9
Channel 10
Channel 11
Channel 12
Channel 13
Channel 14
Channel 15
Channel 16
5
BEIR6
0
4
BEIR5
0
3
BEIR4
0
2
BEIR3
0
1
BEIR2
0
0
BEIR1
0
5
BEIR14
0
4
BEIR13
0
3
BEIR12
0
2
BEIR11
0
1
BEIR10
0
0
BEIR9
0
31h
Bit 7 to 0: BPV Error Insertion Register n (BEIRn). A 0 to 1 transition on this bit will cause a single bipolar
violation (BPV) to be inserted into the transmit data stream channel n. This bit must be cleared and set again for a
subsequent error to be inserted. This is only applicable in single-rail mode.
76 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
LVDS8
0
6
LVDS7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
LVDS16
0
6
LVDS15
0
LVDS
Line Violation Detect Status
12h
5
LVDS6
0
4
LVDS5
0
3
LVDS4
0
2
LVDS3
0
1
LVDS2
0
0
LVDS1
0
4
LVDS13
0
3
LVDS12
0
2
LVDS11
0
1
LVDS10
0
0
LVDS9
0
32h
5
LVDS14
0
Bit 7 to 0: Line Violation Detect Status n (LVDSn). A bipolar violation, a code violation, or excessive zeros will
cause the associated LVDSn bit to latch. This bit will be cleared on a read operation. The LVDS register captures
the first violation within a three clock period window. If a second violation occurs after the first violation within the
three clock period window, then the second violation will not be latched even if a read to the LVDS register was
performed. Excessive zeros need to be enabled by the EZDE register for detection by this register. Code violations
are only relative when in HDB3 mode and can be disabled for detection by this register by setting the CVDEB
register. In dual-rail mode only bipolar violations are relevant for this register.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RCLKI8
0
6
RCLKI7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RCLKI16
0
6
RCLKI15
0
RCLKI
Receive Clock Invert
13h
5
RCLKI6
0
4
RCLKI5
0
3
RCLKI4
0
2
RCLKI3
0
1
RCLKI2
0
0
RCLKI1
0
4
RCLKI13
0
3
RCLKI12
0
2
RCLKI11
0
1
RCLKI10
0
0
RCLKI9
0
33h
5
RCLKI14
0
Bit 7 to 0: Receive Clock Invert n (RCLKIn). When this bit is set the RCLK for channel n is inverted. This aligns
RPOS/RNEG on the falling edge of RCLK. When reset or default RPOS/RNEG is aligned on the rising edge of
RCLK.
77 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
TCLKI8
0
6
TCLKI7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
TCLKI16
0
TCLKI
Transmit Clock Invert
14h
5
TCLKI6
0
4
TCLKI5
0
3
TCLKI4
0
2
TCLKI3
0
1
TCLKI2
0
0
TCLKI1
0
4
TCLKI13
0
3
TCLKI12
0
2
TCLKI11
0
1
TCLKI10
0
0
TCLKI9
0
34h
6
TCLKI15
0
5
TCLKI14
0
Bit 7 to 0: Transmit Clock Invert n (TCLKIn). When this bit is set the expected TCLK for channel n is inverted.
TPOS/TNEG should be aligned on the falling edge of TCLK. When reset or default TPOS/TNEG should be aligned
on the rising edge of TCLK.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
7
PCLKS2
0
CCR
Clock Control Register
15h
6
PCLKS1
0
5
PCLKS0
0
4
TECLKS
0
3
CLKA3
0
2
CLKA2
0
1
CLKA1
0
0
CLKA0
0
Bit 7 to 5: PLL Clock Select (PCLKS[2:0]). These bits determine the RCLK that is to be used as the input to the
PLL. If a LOS is detect for the channel that RCLK is recovered from, the PLL will switch to MCLK until the LOS is
cleared. When the LOS is cleared RCLK will be used again. See Table 6-21 for RCLK selection. MC.PCLKI[1:0]
must be set to ‘01’ or ‘10’ in order for these settings to take affect.
Table 6-21. PLL Clock Select
PCLKS2 TO
PCLKS0
000
001
010
011
100
101
110
111
PLL CLOCK
SELECTED
MC.PCLKI[1:0]=01
RCLK1
RCLK2
RCLK3
RCLK4
RCLK5
RCLK6
RCLK7
RCLK8
PLL CLOCK
SELECTED
MC.PCLKI[1:0]=10
RCLK9
RCLK10
RCLK11
RCLK12
RCLK13
RCLK14
RCLK15
RCLK16
Bit 4: T1/E1 Clock Select (TECLKS). When this bit is set the T1/E1 clock output is 2.048MHz. When this bit is
reset the T1/E1 clock rate is 1.544MHz
Bit 3 to 0: Clock A Select (CLKA[3:0]). These bits select the output frequency for CLKA pin. See Table 6-22 for
available frequencies. For best jitter performance, select MCLK as the source for CLKA and input a 2.048MHz
MCLK.
78 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 6-22. Clock A Select
CLKA3 TO CLKA0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
CLKA (Hz)
2.048M
4.096M
8.192M
16.384M
1.544M
3.088M
6.176M
12.352M
1.536M
3.072M
6.144M
12.288M
32k
64k
128k
256k
Register Name:
Register Description:
Register Address (LIUs 1-8):
Bit #
Name
Default
7
RDULR8
0
6
RDULR7
0
Register Address (LIUs 9-16):
Bit #
Name
Default
7
RDULR16
0
RDULR
RCLK Disable Upon LOS Register
16h
5
RDULR6
0
4
RDULR5
0
3
RDULR4
0
2
RDULR3
0
1
RDULR2
0
0
RDULR1
0
5
RDULR14
0
4
RDULR13
0
3
RDULR12
0
2
RDULR11
0
1
RDULR10
0
0
RDULR9
0
36h
6
RDULR15
0
Bit 7 to 0: RCLK Disable Upon LOS Register n (RDULRn). When this bit is set the RCLK for channel n is
disabled upon a loss of signal and set as a low output. When reset or default RCLK will switch to MCLK upon a
loss of signal within 10ms.
79 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
GISC
Global Interrupt Status Control
1Eh
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
7
—
0
6
—
0
5
—
0
4
—
0
3
—
0
2
—
0
1
INTM
0
0
CWE
0
Bit 0: Clear On Write Enable (CWE). When this bit is set the Clear on Write is enabled for all the Latched Interrupt
Status registers. The host processor has to write a 1 to the Latched Interrupt Status Register bit position before the
particular bit will be cleared. Default for all the Latched interrupt Status registers is to clear on a read.
Bit 1: INT Pin Mode (INTM) This bit determines the inactive mode of the INT pin. The INT pin always drives low
when active.
0 = Pin is high impedance when not active
1 = Pin drives high when not active
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
6.1.4
BERT Registers
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
PMUM
0
6
LPMU
0
BCR
BERT Control Register
00h
20h
5
RNPL
0
4
RPIC
0
3
MPR
0
2
APRD
0
1
TNPL
0
0
TPIC
0
Bit 7: Performance Monitoring Update Mode (PMUM). When 0, a performance monitoring update is initiated by
the LPMU register bit. When 1, a performance monitoring update is initiated by the receive performance monitoring
update signal (RPMU). Note: If RPMU or LPMU is one, changing the state of this bit may cause a performance
monitoring update to occur.
Bit 6: Local Performance Monitoring Update (LPMU). This bit causes a performance monitoring update to be
initiated if local performance monitoring update is enabled (PMUM = 0). A 0 to 1 transition causes the performance
monitoring registers to be updated with the latest data, and the counters reset (0 or 1). For a second performance
monitoring update to be initiated, this bit must be set to 0, and back to 1. If LPMU goes low before the PMS bit
goes high, an update might not be performed. This bit has no affect when PMUM=1.
Bit 5: Receive New Pattern Load (RNPL). A zero to one transition of this bit will cause the programmed test
pattern (QRSS, PTS, PLF[4:0], PTF[4:0], and BSP[31:0]) to be loaded in to the receive pattern generator. This bit
must be changed to zero and back to one for another pattern to be loaded. Loading a new pattern will forces the
receive pattern generator out of the “Sync” state which causes a resynchronization to be initiated. Note: QRSS,
PTS, PLF[4:0}, PTF[4:0], and BSP[31:0] must not change from the time this bit transitions from 0 to 1 until four
RXCK clock cycles after this bit transitions from 0 to 1.
Bit 4: Receive Pattern Inversion Control (RPIC). When 0, the receive incoming data stream is not altered. When
1, the receive incoming data stream is inverted.
Bit 3: Manual Pattern Resynchronization (MPR). A zero to one transition of this bit will cause the receive pattern
generator to resynchronize to the incoming pattern. This bit must be changed to zero and back to one for another
resynchronization to be initiated. Note: A manual resynchronization forces the receive pattern generator out of the
“Sync” state.
Bit 2: Automatic Pattern Resynchronization Disable (APRD). When 0, the receive pattern generator will
automatically resynchronize to the incoming pattern if six or more times during the current 64-bit window the
incoming data stream bit and the receive pattern generator output bit did not match. When 1, the receive pattern
generator will not automatically resynchronize to the incoming pattern. Note: Automatic synchronization is
prevented by not allowing the receive pattern generator to automatically exit the “Sync” state.
Bit 1: Transmit New Pattern Load (TNPL). A zero to one transition of this bit will cause the programmed test
pattern (QRSS, PTS, PLF[4:0], PTF[4:0], and BSP[31:0]) to be loaded in to the transmit pattern generator. This bit
must be changed to zero and back to one for another pattern to be loaded. Note: QRSS, PTS, PLF[4:0}, PTF[4:0],
and BSP[31:0] must not change from the time this bit transitions from 0 to 1 until four TXCK clock cycles after this
bit transitions from 0 to 1.
Bit 0: Transmit Pattern Inversion Control (TPIC. When 0, the transmit outgoing data stream is not altered. When
1, the transmit outgoing data stream is inverted.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
QRSS
0
BPCR1
BERT Pattern Configuration Register 1
02h
22h
5
PTS
0
4
PLF4
0
3
PLF3
0
2
PLF2
0
1
PLF1
0
0
PLF0
0
Bit 6: QRSS Enable (QRSS). When 0, the pattern generator configuration is controlled by PTS, PLF[4:0], and
PTF[4:0], and BSP[31:0]. When 1, the pattern generator configuration is forced to a PRBS pattern with a
20
17
generating polynomial of x + x + 1. The output of the pattern generator will be forced to one if the next fourteen
output bits are all zero.
Bit 5: Pattern Type Select (PTS). When 0, the pattern is a PRBS pattern. When 1, the pattern is a repetitive
pattern.
Bit 4 to 0: Pattern Length Feedback (PLF[4:0]). These five bits control the “length” feedback of the pattern
generator. The “length” feedback will be from bit n of the pattern generator (n = PLF[4:0] +1). For a PRBS signal,
the feedback is an XOR of bit n and bit y. For a repetitive pattern the feedback is bit n.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
—
0
BPCR 2
BERT Pattern Configuration Register 2
03h
23h
5
—
0
4
PTF4
0
3
PTF3
0
2
PTF2
0
1
PTF1
0
0
PTF0
0
Bit 4-0: Pattern Tap Feedback (PTF[4:0]). These five bits control the PRBS “tap” feedback of the pattern
generator. The “tap” feedback will be from bit y of the pattern generator (y = PTF[4:0] +1). These bits are ignored
when programmed for a repetitive pattern. For a PRBS signal, the feedback is an XOR of bit n and bit y.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BSP7
0
6
BSP6
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BSP15
0
6
BSP14
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BSP23
0
6
BSP22
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BSP31
0
6
BSP30
0
BSPR1
BERT Seed/Pattern Register #1
04h
24h
5
BSP5
0
4
BSP4
0
3
BSP3
0
2
BSP2
0
1
BSP1
0
0
BSP0
0
2
BSP10
0
1
BSP9
0
0
BSP8
0
2
BSP18
0
1
BSP17
0
0
BSP16
0
2
BSP26
0
1
BSP25
0
0
BSP24
0
BSPR2
BERT Seed/Pattern Register #2
05h
25h
5
BSP13
0
4
BSP12
0
3
BSP11
0
BSPR3
BERT Seed/Pattern Register #3
06h
26h
5
BSP21
0
4
BSP20
0
3
BSP19
0
BSPR4
BERT Seed/Pattern Register #4
07h
27h
5
BSP29
0
4
BSP28
0
3
BSP27
0
BERT Seed/Pattern (BSP[31:0]). These 32 bits are the programmable seed for a transmit PRBS pattern, or the
programmable pattern for a transmit or receive repetitive pattern. BSP(31) will be the first bit output on the transmit
side for a 32-bit repetitive pattern or 32-bit length PRBS. BSP(31) will be the first bit input on the receive side for a
32-bit repetitive pattern.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
—
0
TEICR
Transmit Error Insertion Control Register
08h
28h
5
TEIR2
0
4
TEIR1
0
3
TEIR0
0
2
BEI
0
1
TSEI
0
0
MEIMS
0
Bit 5-3: Transmit Error Insertion Rate (TEIR[2:0]). These three bits indicate the rate at which errors are inserted
n
in the output data stream. One out of every 10 bits is inverted. TEIR[2:0] is the value n. A TEIR[2:0] value of 0
disables error insertion at a specific rate. A TEIR[2:0] value of 1 result in every 10th bit being inverted. A TEIR[2:0]
value of 2 result in every 100th bit being inverted. Error insertion starts when this register is written to with a
TEIR[2:0] value that is nonzero. If this register is written to during the middle of an error insertion process, the new
error rate will be started after the next error is inserted.
Bit 2: Bit Error Insertion Enable (BEI). When 0, single bit error insertion is disabled. When 1, single bit error
insertion is enabled.
Bit 1: Transmit Single Error Insert (TSEI). This bit causes a bit error to be inserted in the transmit data stream if
manual error insertion is disabled (MEIMS = 0) and single bit error insertion is enabled. A 0 to 1 transition causes a
single bit error to be inserted. For a second bit error to be inserted, this bit must be set to 0, and back to 1. Note: If
MEIMS is low, and this bit transitions more than once between error insertion opportunities, only one error will be
inserted.
Bit 0: Manual Error Insert Mode Select (MEIMS). When 0, error insertion is initiated by the TSEI register bit.
When 1, error insertion is initiated by the transmit manual error insertion signal (TMEI). Note: If TMEI or TSEI is
one, changing the state of this bit may cause a bit error to be inserted.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
—
0
BSR
BERT Status Register
0Ch
2Ch
5
—
0
4
—
0
3
PMS
0
2
-0
1
BEC
0
0
OOS
0
Bit 3: Performance Monitoring Update Status (PMS). This bit indicates the status of the receive performance
monitoring register (counters) update. This bit will transition from low to high when the update is completed. PMS is
asynchronously forced low when the LPMU bit (PMUM = 0) or RPMU signal (PMUM=1) goes low.
Bit 1: Bit Error Count (BEC). When 0, the bit error count is zero. When 1, the bit error count is one or more.
Bit 0: Out Of Synchronization (OOS). When 0, the receive pattern generator is synchronized to the incoming
pattern. When 1, the receive pattern generator is not synchronized to the incoming pattern.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
—
0
BSRL
BERT Status Register Latched
0Eh
2Eh
5
—
0
4
—
0
3
PMSL
0
2
BEL
0
1
BECL
0
0
OOSL
0
Bit 3: Performance Monitoring Update Status Latched (PMSL). This bit is set when the PMS bit transitions from
0 to 1. A read operation clears this bit.
Bit 2: Bit Error Latched (BEL). This bit is set when a bit error is detected. A read operation clears this bit.
Bit 1: Bit Error Count Latched (BECL). This bit is set when the BEC bit transitions from 0 to 1. A read operation
clears this bit.
Bit 0: Out Of Synchronization Latched (OOSL). This bit is set when the OOS bit changes state. A read operation
clears this bit.
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
—
0
6
—
0
BSRIE
BERT Status Register Interrupt Enable
10h
30h
5
—
0
4
—
0
3
PMSIE
0
2
BEIE
0
1
BECIE
0
0
OOSIE
0
Bit 3: Performance Monitoring Update Status Interrupt Enable (PMSIE). This bit enables an interrupt if the
PMSL bit is set.
0 = interrupt disabled
1 = interrupt enabled
Bit 2: Bit Error Interrupt Enable (BEIE). This bit enables an interrupt if the BEL bit is set.
0 = interrupt disabled
1 = interrupt enabled
Bit 1: Bit Error Count Interrupt Enable (BECIE). This bit enables an interrupt if the BECL bit is set.
0 = interrupt disabled
1 = interrupt enabled
Bit 0: Out Of Synchronization Interrupt Enable (OOSIE). This bit enables an interrupt if the OOSL bit is set.
0 = interrupt disabled
1 = interrupt enabled
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BEC7
0
6
BEC6
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BEC15
0
6
BEC14
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BEC23
0
6
BEC22
0
RBECR1
Receive Bit Error Count Register #1
14h
34h
5
BEC5
0
4
BEC4
0
3
BEC3
0
2
BEC2
0
1
BEC1
0
0
BEC0
0
2
BEC10
0
1
BEC9
0
0
BEC8
0
2
BEC18
0
1
BEC17
0
0
BEC16
0
RBECR2
Receive Bit Error Count Register #1
15h
35h
5
BEC13
0
4
BEC12
0
3
BEC11
0
RBECR3
Receive Bit Error Count Register #2
16h
36h
5
BEC21
0
4
BEC20
0
3
BEC19
0
Bit Error Count (BEC[23:0]). These twenty-four bits indicate the number of bit errors detected in the incoming
data stream. This count stops incrementing when it reaches a count of FF FFFFh. The associated bit error counter
will not incremented when an OOS condition exists.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BC7
0
6
BC6
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
15
BC15
0
14
BC14
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
7
BC23
0
6
BC22
0
Register Name:
Register Description:
Register Address (LIUs 1-8):
Register Address (LIUs 9-16):
Bit #
Name
Default
15
BC31
0
14
BC30
0
RBCR1
Receive Bit Count Register #1
18h
38h
5
BC5
0
4
BC4
0
3
BC3
0
2
BC2
0
1
BC1
0
0
BC0
0
11
BC11
0
10
BC10
0
9
BC9
0
8
BC8
0
3
BC19
0
2
BC18
0
1
BC17
0
0
BC16
0
11
BC27
0
10
BC26
0
9
BC25
0
8
BC24
0
RBCR2
Receive Bit Count Register #2
19h
39h
13
BC13
0
12
BC12
0
RBCR3
Receive Bit Count Register #3
1Ah
3Ah
5
BC21
0
4
BC20
0
RBCR4
Receive Bit Count Register #4
1Bh
3Bh
13
BC29
0
12
BC28
0
Bit Count (BC[31:0]). These thirty-two bits indicate the number of bits in the incoming data stream. This count
stops incrementing when it reaches a count of FFFF FFFFh. The associated bit counter will not incremented when
an OOS condition exists.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
7 JTAG-BOUNDARY-SCAN ARCHITECTURE AND TEST-ACCESS PORT
The DS26334 IEEE 1149.1 design supports the standard instruction codes SAMPLE/PRELOAD, BYPASS, and
EXTEST. Optional public instructions included are HIGHZ, CLAMP, and IDCODE. The DS26334 contains the
following as required by IEEE 1149.1 Standard Test-Access Port and Boundary-Scan Architecture:
·
·
·
·
·
·
Test Access Port (TAP)
TAP Controller
Instruction Register
Bypass Register
Boundary Scan Register
Device Identification Register
Details on Boundary Scan Architecture and the Test Access Port can be found in IEEE 1149.1-1990, IEEE
1149.1a-1993, and IEEE 1149.1b-1994. The Test Access Port has the necessary interface pins: TRSTB, TCLK,
TMS, TDI, and TDO. See the pin descriptions for details. For the latest BSDL files
go to www.maxim-ic.com/tools/bsdl/ and search for DS26334.
Figure 7-1. JTAG Functional Block Diagram
BOUNDARY SCAN
REGISTER
INDENTIFICATION
REGISTER
BYPASS
REGISTER
MUX
INSTRUCTION
REGISTER
SELECT
TEST ACCESS PORT
CONTROLLER
+V
+V
+V
10kW
10kW
10kW
TDI
OUTPUT ENABLE
TMS
TCLK
88 of 115
TRSTB
TDO
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
7.1
TAP Controller State Machine
The TAP controller is a finite state machine that responds to the logic level at TMS on the rising edge of TCLK. The
state diagram is shown in Figure 7-2.
Test-Logic-Reset
Upon power-up, the TAP controller will be in the test-logic-reset state. The instruction register will contain the
IDCODE instruction. All system logic of the device will operate normally. This state is automatically entered during
power-up. This state is entered from any state if the TMS is held high for at least 5 clocks.
Run-Test-Idle
The run-test-idle is used between scan operations or during specific tests. The instruction register and test
registers will remain idle. The controller remains in this state when TMS is held low. When the TMS is high and
rising edge of TCLK is applied the controller moves to the Select-DR-Scan State.
Select-DR-Scan
All test registers retain their previous state. With TMS LOW, a rising edge of TCLK moves the controller into the
capture-DR state and will initiate a scan sequence. TMS HIGH during a rising edge on TCLK moves the controller
to the select-IR-scan state.
Capture-DR
Data can be parallel-loaded into the test-data registers if the current instruction is EXTEST or SAMPLE/PRELOAD.
If the instruction does not call for a parallel load or the selected register does not allow parallel loads, the test
register will remain at its current value. On the rising edge of TCLK, the controller will go to the shift-DR state if
TMS is LOW or it will go to the exit1-DR state if TMS is HIGH.
Shift-DR
The test-data register selected by the current instruction will be connected between TDI and TDO and will shift data
one stage towards its serial output on each rising edge of TCLK. If a test register selected by the current instruction
is not placed in the serial path, it will maintain its previous state. When the TAP Controller is in this state and a
rising edge of TCLK is applied, the controller enters the EXIT1-DR state if TMS is high or remains in SHIFT-DR
state if TMS is low.
Exit1-DR
While in this state, a rising edge on TCLK will put the controller in the Update-DR state, which terminates the
scanning process, if TMS is HIGH. A rising edge on TCLK with TMS LOW will put the controller in the Pause-DR
state.
Pause-DR
Shifting of the test registers is halted while in this state. All test registers selected by the current instruction will
retain their previous state. The controller will remain in this state while TMS is LOW. A rising edge on TCLK with
TMS HIGH will put the controller in the exit2-DR state.
Exit2-DR
A rising edge on TCLK with TMS HIGH while in this state will put the controller in the update-DR state and
terminate the scanning process. A rising edge on TCLK with TMS LOW will enter the shift-DR state.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Update-DR
A falling edge on TCLK while in the update-DR state will latch the data from the shift register path of the test
registers into the data output latches. This prevents changes at the parallel output due to changes in the shift
register.
Select-IR-Scan
All test registers retain their previous state. The instruction register will remain unchanged during this state. With
TMS LOW, a rising edge on TCLK moves the controller into the capture-IR state and will initiate a scan sequence
for the instruction register. TMS HIGH during a rising edge on TCLK puts the controller back into the Test-logicreset state.
Capture-IR
The capture-IR state is used to load the shift register in the instruction register with a fixed value. This value is
loaded on the rising edge of TCLK. If TMS is HIGH on the rising edge of TCLK, the controller will enter the exit1-IR
state. If TMS is LOW on the rising edge of TCLK, the controller will enter the shift-IR state.
Shift-IR
In this state, the shift register in the instruction register is connected between TDI and TDO and shifts data one
stage for every rising edge of TCLK towards the serial output. The parallel registers as well as all test registers
remain at their previous states. A rising edge on TCLK with TMS HIGH will move the controller to the exit1-IR state.
A rising edge on TCLK with TMS LOW will keep the controller in the shift-IR state while moving data one stage
thorough the instruction shift register.
Exit1-IR
A rising edge on TCLK with TMS LOW will put the controller in the pause-IR state. If TMS is HIGH on the rising
edge of TCLK, the controller will enter the update-IR state and terminate the scanning process.
Pause-IR
Shifting of the instruction shift register is halted temporarily. With TMS HIGH, a rising edge on TCLK will put the
controller in the Exit2-IR state. The controller will remain in the Pause-IR state if TMS is LOW during a rising edge
on TCLK.
Exit2-IR
A rising edge on TCLK with TMS High will put the controller in the Update-IR state. The controller will loop back to
shift-IR if TMS is LOW during a rising edge of TCLK in this state.
Update-IR
The instruction code shifted into the instruction shift register is latched into the parallel output on the falling edge of
TCLK as the controller enters this state. Once latched, this instruction becomes the current instruction. A rising
edge on TCLK with TMS LOW will put the controller in the run-test-idle state. With TMS HIGH, the controller will
enter the select-DR-scan state.
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 7-2. TAP Controller State Diagram
1
Test Logic
Reset
0
0
Run Test/
Idle
1
Select
DR-Scan
1
Select
IR-Scan
0
1
0
1
Capture DR
Capture IR
0
Shift DR
0
Shift IR
0
1
Exit DR
1
Exit IR
Exit2 DR
Pause IR
0
1
0
Exit2 IR
1
Update DR
1
0
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1
0
1
0
0
1
0
Pause DR
1
1
Update IR
1
0
0
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
7.2
Instruction Register
The instruction register contains a shift register as well as a latched parallel output and is 3 bits in length. When the
TAP controller enters the shift-IR state, the instruction shift register will be connected between TDI and TDO. While
in the shift-IR state, a rising edge on TCLK with TMS LOW will shift the data one stage towards the serial output at
TDO. A rising edge on TCLK in the exit1-IR state or the exit2-IR state with TMS HIGH will move the controller to
the update-IR state. The falling edge of that same TCLK will latch the data in the instruction shift register to the
instruction parallel output. Instructions supported by the DS26334 and its respective operational binary codes are
shown in Table 7-1.
Table 7-1. Instruction Codes for IEEE 1149.1 Architecture
INSTRUCTION
SELECTED REGISTER
INSTRUCTION CODES
EXTEST
HIGHZ
CLAMP
SAMPLE/PRELOAD
IDCODE
BYPASS
Boundary Scan
Bypass
Bypass
Boundary Scan
Device Identification
Bypass
000
010
011
100
110
111
EXTEST
This allows testing of all interconnections to the device. When the EXTEST instruction is latched in the instruction
register, the following actions occur. Once enabled via the Update-IR state, the parallel outputs of all digital output
pins will be driven. The boundary scan register will be connected between TDI and TDO. The Capture-DR will
sample all digital inputs into the boundary scan register.
HIGHZ
All digital outputs of the device will be placed in a high-impedance state. The BYPASS register will be connected
between TDI and TDO.
CLAMP
All digital outputs of the device will output data from the boundary scan parallel output while connecting the bypass
register between TDI and TDO. The outputs will not change during the CLAMP instruction.
SAMPLE/PRELOAD
This is a mandatory instruction for the IEEE 1149.1 specification that supports two functions. The digital I/Os of the
device can be sampled at the boundary scan register without interfering with the normal operation of the device by
using the capture-DR state. SAMPLE/PRELOAD also allows the device to shift data into the boundary scan
register via TDI using the shift-DR state.
IDCODE
When the IDCODE instruction is latched into the parallel instruction register, the identification test register is
selected. The device identification code will be loaded into the identification register on the rising edge of TCLK
following entry into the capture-DR state. Shift-DR can be used to shift the identification code out serially via TDO.
During test-logic-reset, the identification code is forced into the instruction register’s parallel output. The ID code
will always have a 1 in the LSB position. The next 11 bits identify the manufacturer’s JEDEC number and number
of continuation bytes followed by 16 bits for the device and 4 bits for the version Table 7-2. Table 7-3 lists the
device ID code for the DS26334.
BYPASS
When the BYPASS instruction is latched into the parallel instruction register, TDI connects to TDO through the onebit bypass test register. This allows data to pass from TDI to TDO not affecting the device’s normal operation.
92 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 7-2. ID Code Structure
MSB
Version
Contact Factory
4 bits
Device ID
JEDEC
LSB
1
16 bits
00010100001
1
Table 7-3. Device ID Codes
7.3
DEVICE
16-BIT ID
DS26334
003C h
Test Registers
IEEE 1149.1 requires a minimum of two test registers: the bypass register and the boundary scan register. An
optional test register has been included with the DS26334 design. This test register is the identification register and
is used with the IDCODE instruction and the test-logic-reset state of the TAP controller.
7.4
Boundary Scan Register
This register contains both a shift register path and a latched parallel output for all control cells and digital I/O cells
and is n bits in length.
7.5
Bypass Register
This is a single 1-bit shift register used with the BYPASS, CLAMP, and HIGHZ instructions that provide a short
path between TDI and TDO.
7.6
Identification Register
The identification register contains a 32-bit shift register and a 32-bit latched parallel output. This register is
selected during the IDCODE instruction and when the TAP controller is in the test-logic-reset state. See Table 7-2
and Table 7-3 for more information about bit usage.
93 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
8 DC ELECTRICAL CHARACTERIZATION
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Lead with Respect to VSS (except VDD)…………………………………………….-0.3V to +5.5V
Supply Voltage (VDD) Range with Respect to VSS…..………………………………………………………-0.3V to +3.63V
Operating Temperature Range for DS26334G………………………………………………………………..0°C to +70°C
Operating Temperature Range for DS26334GN………………………………………………..…………..-40°C to +85°C
Storage Temperature…………………………………………………………………………………………-55°C to +125°C
Soldering Temperature………………………………………………………….See IPC/JEDEC J-STD-020 Specification
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
Table 8-1. DC Pin Logic Levels
RECOMMENDED DC OPERATING CONDITIONS
(TA = -40°C to +85°C for DS26334GN.)
PARAMETER
SYMBOL
MIN
Logic 1
VIH
Logic 0
Supply
TYP
MAX
UNITS
2.0
5.5
V
VIL
–0.3
+0.8
V
VDD
3.135
3.3
3.465
V
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Table 8-2. Pin Capacitance
CAPACITANCE
(TA = +25°C)
PARAMETER
Input Capacitance
Output Capacitance
CIN
7
pF
COUT
7
pF
NOTES
Table 8-3. Supply Current and Output Voltage
DC CHARACTERISTICS
(VDD = 3.135 to 3.465V, TA = -40°C to +85°C.)
PARAMETER
SYMBOL
MIN
Supply Current at 3.465V
TYP
IDD
Supply Current at 3.3V
MAX
UNITS
NOTES
1100
mA
1, 2
500
Input Leakage
IIL
–10.0
+10.0
mA
Tri-State Output Leakage
IOL
–10.0
+10.0
mA
Output Voltage (Io = –4.0mA)
VOH
2.4
Output Voltage (Io = +4.0mA)
VOL
V
0.4
V
Note 1:
RCLK1-n = TCLK1-n = 1.544MHz.
Note 2:
Power dissipation with all ports active, TTIP and TRING driving a 25W load, for an all-ones data density.
94 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
9 AC TIMING CHARACTERISTICS
9.1
Line Interface Characteristics
Table 9-1. Transmitter Characteristics
PARAMETER
SYMBOL
E1 75W
Output Mark
Amplitude
E1 120W
VM
T1 100W
T1 110W
Output Zero Amplitude
VS
Transmit Amplitude Variation with
Supply
Transmit Path Delay
MIN
TYP
MAX
2.14
2.37
2.6
2.7
3.0
3.3
2.4
3.0
3.6
2.4
3.0
3.6
-0.3
+0.3
-1%
+1%
Single Rail
8
Dual Rail
3
UNITS
NOTES
V
V
1
UI
Table 9-2. Receiver Characteristics
PARAMETER
SYMBOL
Cable Attenuation
MIN
TYP
UNITS
12
dB
Attn
Analog Loss-of-Signal Threshold
200
Hysteresis Short-Haul Mode
100
Analog Loss-of-Signal Threshold
Long-Haul Mode
30
Hysteresis Long-Haul Mode
40
mv
Allowable Ones Before Loss
Single Rail
8
Dual Rail
3
Note 1:
Measured at the RRING and RTIP pins.
Note 2:
192 zeros for T1 and T1.231 Specification Compliance; 192 zeros for E1 and G.775 Specification
Compliance; 2048 zeros for ETSI 300 233 compliance.
Note 3:
24 ones in 192-bit period for T1.231; 192 ones for G.775; 192 ones for ETSI 300 233.
95 of 115
NOTES
1
mv
192
192
2048
24
192
192
Allowable Zeros Before Loss
Receive Path Delay
MAX
2
3
UI
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
9.2
Parallel Host Interface Timing Characteristics
The AC characteristics for the external bus interface.
Table 9-3. Intel Read Mode Characteristics
(VDD = 3.3V ±5%, TJ = -40°C to +125°C.)
SIGNAL
NAME(S)
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
NOTES
RDB
t1
Pulse width if not using RDYB
40
ns
1
CSB
t2
Setup time to RDB
0
ns
1
CSB
t3
Hold time from RDB
0
ns
1
AD[7:0]
t4
Setup time to ALE
2
ns
1
A[5:0]
t5
Hold time from RDB
0
ns
1
D[7:0], AD[7:0]
t6
Delay time RDB, CSB active
40
ns
1
D[7:0], AD[7:0]
t7
Deassert delay from RDB, CSB inactive
20
ns
1
RDYB
t8
Enable delay time from CSB active
20
ns
1
RDYB
t9
Disable delay time from the CSB inactive
15
ns
1
AD[7:0]
t10
Hold time from ALE
3
ns
1
ALE
t11
Pulse width
5
ns
1
D[7:0]
t12
Output delay from ALE Latched
ns
1
A[5:0]
t13
Setup time to RDB
10
ns
1
RDYB
t14
Delay time from RDB
0
ns
1
RDYB
t15
Active output delay time from RDB
10
ns
1
Note 1:
The input/output timing reference level for all signals is VDD/2.
96 of 115
2
40
35
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-1. Intel Nonmuxed Read Cycle
t3
t2
CSB
t1
RDB
ALE=(1)
t5
t13
A[5:0]
ADDRESS
t6
t7
D[7:0]
DATA OUT
t8
t14
RDYB
t15
97 of 115
t9
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-2. Intel Mux Read Cycle
t3
t2
CSB
t1
RDB
t11
t12
ALE
t6
t4
AD[7:0]
t10
t7
DATA OUT
ADDRESS
t8
t14
RDYB
t15
98 of 115
t9
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 9-4. Intel Write Cycle Characteristics
(VDD = 3.3V ±5%, TJ = -40°C to +125°C.)
SIGNAL
NAME(S)
WRB
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
NOTES
t1
Pulse width
40
ns
1
CSB
t2
Setup time to WRB
0
ns
1
CSB
t3
Hold time to WRB
0
ns
1
AD[7:0]
t4
Setup time to ALE
2
ns
1
A[5:0]
t5
Hold time from WRB
0
ns
1
D[7:0], AD[7:0]
t6
Input setup time to WRB
10
ns
1
D[7:0], AD[7:0]
t7
Input hold time to WRB
5
ns
1
RDYB
t8
Enable delay from CSB active
ns
1
RDYB
t9
Delay time from WRB active
10
ns
1
RDYB
t10
Delay time from WRB inactive
0
ns
1
RDYB
t11
Disable delay time from CSB inactive
ns
1
ALE
t12
Pulse width
5
ns
1
AD[7:0]
t13
Hold time from ALE inactive
3
ns
1
A[5:0]
t14
Valid address to WRB inactive
35
ns
1
Note 1:
The input/output timing reference level for all signals is VDD/2.
99 of 115
20
15
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-3. Intel Nonmux Write Cycle
t3
t2
CSB
t1
WRB
ALE=(1)
t14
t5
A[5:0]
ADDRESS
t7
t6
D[7:0]
WRITE DATA
t10
t8
RDYB
t9
100 of 115
t11
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-4. Intel Mux Write Cycle
t3
t2
CSB
t1
WRB
t12
ALE
t13
t4
AD[7:0]
t6
t7
WRITE DATA
ADDRESS
t8
t10
RDYB
t9
101 of 115
t11
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 9-5. Motorola Read Cycle Characteristics
(VDD = 3.3V ±5%, TJ = -40°C to +125°C.)
SIGNAL
NAME(S)
SYMBOL
DESCRIPTION
MIN
TYP MAX
UNITS
NOTES
DS
t1
Pulse width
40
ns
1
CSB
t2
Setup time to DSB active
0
ns
1
CSB
t3
Hold time from DSB inactive
0
ns
1
RWB
t4
Setup time to DSB active
0
ns
1
RWB
t5
Hold time from DSB inactive
0
ns
1
AD[7:0]
t6
Setup time to ASB active
2
ns
1
AD[7:0]
t7
Hold time to ASB inactive
3
ns
1
AD[7:0], D[7:0]
t8
Output delay time from DSB active
40
ns
1
AD[7:0], D[7:0]
t10
Output valid delay time from DSB inactive
20
ns
1
ACKB
t11
Output delay time from CSB inactive
15
ns
1
ACKB
t12
Output delay time from DSB inactive
ns
1
ACKB
t13
Enable output delay time from DSB active
20
ns
1
ACKB
t14
Output delay time from DSB active
10
35
ns
1
A[5:0]
t15
Hold time from DSB inactive
0
ns
1
A[5:0]
t16
Setup time to DSB active
10
ns
1
Note 1:
The input/output timing reference level for all signals is VDD/2.
102 of 115
2
0
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-5. Motorola Nonmux Read Cycle
t3
t2
CSB
t4
t5
RWB
t1
DSB
ASB=(1)
t16
t15
A[5:0]
ADDRESS
t8
t10
D[7:0]
DATA OUT
t12
ACKB
t13
t14
103 of 115
t11
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-6. Motorola Mux Read Cycle
t3
t2
CSB
t4
t5
RWB
t1
DSB
t14
ASB
t6
AD[7:0]
t7
t10
t8
ADDRESS
DATA OUT
t12
ACKB
t13
t14
104 of 115
t11
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Table 9-6. Motorola Write Cycle Characteristics
(VDD = 3.3V ±5%, TJ = -40°C to +125°C.)
SIGNAL
NAME(S)
DSB
SYMBOL
DESCRIPTION
MIN
TYP
MAX UNITS NOTES
t1
Pulse width
35
ns
1
CSB
t2
Setup time to DSB active
0
ns
1
CSB
t3
Hold time from DSB inactive
0
ns
1
RWB
t4
Setup time to DSB active
0
ns
1
RWB
t5
Hold time to DSB inactive
0
ns
1
AD[7:0]
t6
Setup time to ASB active
2
ns
1
AD[7:0]
t7
Hold time from ASB active
3
ns
1
AD[7:0], D[7:0]
t8
Setup time to DSB inactive
10
ns
1
AD[7:0], D[7:0]
t9
Hold time from DSB inactive
5
ns
1
A[5:0]
t10
Setup time to DSB active
10
ns
1
ACKB
t11
Output delay from CSB inactive
ns
1
ACKB
t12
Output delay from DSB inactive
ns
1
ACKB
t13
Output enable delay time from DSB active
ns
1
ACKB
t14
Output delay time from DSB active
10
ns
1
A[5:0]
t15
Hold time from DSB
0
ns
1
Note 1:
The input/output timing reference level for all signals is VDD/2.
105 of 115
15
0
20
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-7. Motorola Nonmux Write Cycle
t3
t2
CSB
t4
t5
RWB
t1
DSB
ASB=(1)
t10
t15
A[5:0]
ADDRESS
t8
D[7:0]
t9
WRITE DATA
t12
ACKB
t13
t14
106 of 115
t11
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-8. Motorola Mux Write Cycle
t3
t2
CSB
t4
t5
RWB
t1
DSB
t13
ASB
t6
AD[7:0]
t7
t9
t8
WRITE DATA
ADDRESS
t12
t11
ACKB
t13
t14
107 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
9.3
Serial Port
Table 9-7. Serial Port Timing Characteristics
PARAMETER
SYMBOL
MIN
t1
t2
t3
t4
t5
t6
t7
25
25
50
50
50
5
5
SCLK High Time
SCLK Low Time
Active CSB to SCLK Setup Time
Last SCLK to CSB Inactive Time
CSB Idle Time
SDI to SCLK Setup Time
SCLK to SDI Hold Time
SCLK Falling Edge to SDO High-Z (CLKE = 0);
CSB Rising to SDO High-Z (CLKE = 1 )
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
t8
100
ns
Figure 9-9. Serial Bus Timing Write Operation
t5
CSB
t3
t4
SCLK
t1
t2
t6
SDI
t7
LSB
MSB
Figure 9-10. Serial Bus Timing Read Operation with CLKE = 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCLK
CSB
16
t4
SDO
t8
Figure 9-11. Serial Bus Timing Read Operation with CLKE = 1
1
2
3
4
5
6
7
8
SCLK
CSB
9
10
11
12
13
14
15
t4
SDO
t8
108 of 115
16
NOTES
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
9.4
System Timing
Table 9-8. Transmitter System Timing
PARAMETER
SYMBOL
MIN
TYP
MAX
TPOS, TNEG Setup Time with Respect to TCLK Falling
Edge
t1
40
ns
TPOS, TNEG Hold Time with Respect to TCLK Falling
Edge
t2
40
ns
TCLK Pulse-Width High
t3
75
ns
TCLK Pulse-Width Low
t4
75
ns
TCLK Period
t5
TCLK Rise Time
t6
25
ns
TCLK Fall Time
t7
25
ns
488
UNITS
NOTES
ns
648
Figure 9-12. Transmitter Systems Timing
t5
t7
t3
t6
t4
TCLK
t1
TPO S , TN EG
t2
Table 9-9. Receiver System Timing
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Delay RCLK to RPOS, RNEG Valid
t1
50
ns
Delay RCLK to CV Valid in Single-Rail Mode
t2
50
ns
RCLK Pulse-Width High
t3
200
ns
RCLK Pulse-Width Low
t4
200
ns
RCLK Period
t5
109 of 115
488
648
ns
NOTES
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
Figure 9-13. Receiver Systems Timing
RCLK 1
t3
t4
RCLK 2
t5
t1
RPOS,RNEG
t2
CV
Notes:
1) CLKE = 1.
2) CLKE = 0.
BPV/
EXZ/
CV
BPV/
EXZ/
CV
110 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
9.5
JTAG Timing
Table 9-10. JTAG Timing Characteristics
PARAMETER
SYMBOL
MIN
TCK Period
t1
100
ns
TMS and TDI Setup to TCK
t2
25
ns
TMS and TDI Hold to TCK
t3
25
ns
TCK to TDO Hold
t4
Figure 9-14. JTAG Timing
t1
TC K
t2
TM S
TD I
t3
t4
TD O
111 of 115
TYP
MAX
50
UNITS
ns
NOTES
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
10 PIN ASSIGNMENT
Figure 10-1. 256-Ball TEBGA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A
RTIP1
RRING1
MODESEL
RTIP16
VDDT16
TTIP16
TTIP15
VDDT15
RTIP15
VDDT14
TTIP14
TTIP13
VDDT13
RTIP14
TDO
RTIP13
B
AVDD
AVSS
MOTEL
RRING16
RSTB
TRING16
TRING15
LOS14
RRING15
LOS13
TRING14
TRING13
TMS
RRING14
TDI
RRING13
C
RTIP2
RRING2
TNEG1
A4
TNEG16
TNEG15
RNEG15
RPOS15
RNEG14
RPOS14
TCLK13
RPOS13
SDO/RDY/ACKB
TPOS12
AVSS
AVDD
D
VDDT1
LOS1
RCLK1
GNDT1
TPOS16
GNDT16
INTB
GNDT15
GNDT14
GNDT13
TCLK16
TCLK14
GNDT12
TCK
RRING12
RTIP12
E
TTIP1
TRING1
RNEG1
A5
RPOS16
RCLK16
TPOS14
RCLK13
RCLK14
RNEG13
LOS15
TCLK12
TNEG12
RPOS12
TRSTB
VDDT12
F
TTIP2
TRING2
RPOS2
RPOS1
TCLK1
TPOS1
TNEG14
RCLK15
TPOS13
LOS16
RNEG12
RCLK12
RNEG11
TCLK11
TRING12
TTIP12
G
VDDT2
LOS2
A2
TCLK2
RNEG2
RCLK2
TPOS2
TNEG13
TCLK3
TNEG4
TPOS11
RPOS11
RCLK11
SDI/WRB/DSB
TRING11
TTIP11
H
RTIP3
RRING3
A1
GNDT2
A3
TCLK4
AVDD
DVDD
DVSS
AVSS
TNEG11
MCLK
GNDT11
RDB/RWB
LOS12
VDDT11
J
VDDT3
LOS3
RNEG16
GNDT3
TNEG3
TPOS3
AVSS
DVSS
DVDD
AVDD
TPOS10
TNEG10
GNDT10
TNEG2
RRING11
RTIP11
K
TTIP3
TRING3
RCLK3
RNEG3
RCLK4
TPOS4
D3
RPOS5
TNEG8
RNEG8
TCLK9
TCLK10
RPOS10
RCLK10
LOS11
VDDT10
L
TTIP4
TRING4
RPOS3
RPOS4
D4
D0
RNEG5
TCLK6
TPOS5
TCLK7
TPOS9
TNEG9
RCLK9
RNEG10
TRING10
TTIP10
M
VDDT4
LOS4
RNEG4
D5
D1
TNEG5
TCLK5
RCLK6
RPOS6
RNEG6
TPOS8
RPOS8
RNEG9
RPOS9
TRING9
TTIP9
N
RTIP4
RRING4
D7
GNDT4
TPOS6
GNDT5
TCLK15
GNDT6
GNDT7
A0
GNDT8
TPOS15
GNDT9
SCLK/ALE/ASB
LOS10
VDDT9
P
AVDD
AVSS
D6
D2
RCLK5
TNEG6
TNEG7
RPOS7
TCLK8
RCLK7
RNEG7
TPOS7
RCLK8
CSB
RRING10
RTIP10
R
RRING5
LOS5
RRING6
LOS7
TRING5
TRING6
LOS8
RRING7
DVSS
TRING7
TRING8
OE
RRING8
LOS9
AVSS
AVDD
T
RTIP5
LOS6
RTIP6
VDDT5
TTIP5
TTIP6
VDDT6
RTIP7
VDDT7
TTIP7
TTIP8
VDDT8
RTIP8
CLKE/MUX
RRING9
RTIP9
112 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
11 PACKAGE INFORMATION
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline
information, go to www.maxim-ic.com/DallasPackInfo.)
113 of 115
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
12 THERMAL INFORMATION
Table 12-1. Thermal Characteristics
PARAMETER
Power Dissipation in Package
Ambient Temperature
Junction Temperature
Theta-JA (qJA) in Still Air Conduction
Theta-JC (qJC) Conduction
Theta-JB (qJB) Conduction
Theta-JA (qJA) in Forced Air
Theta-JA (qJA) in Forced Air
Theta-JA (qJA) in Forced Air
MIN
TYP
MAX
1.4W
2.5W
+85°C
+125°C
-40°C
+16.6°C/W
+3.0°C/W
+7.5°C/W
+15.0°C/W
+14.6°C/W
+14.0°C/W
V(m/s)
NOTES
3
1
0
0.75
1.25
2.5
Note 1:
The package is mounted on a four-layer JEDEC standard test board.
Note 2:
Theta-JA (qJA) is the junction-to-ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard
test board.
Note 3:
The typical wattage is with 50% ones and LB0.
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2
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
13 REVISION HISTORY
DATE
070105
DESCRIPTION
Official release.
Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product.
No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.
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© 2005 Maxim Integrated Products · Printed USA
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