PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 6
PEF2091
Manufacturer Part Number
PEF2091
Description
ICs for Communications(ISDN Echocancellation Circuit)
Manufacturer
Siemens Semiconductor Group
Datasheet
1.PEF2091.pdf
(298 pages)
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Table of Contents
4.4.2
4.4.2.1
4.4.2.2
4.4.2.3
4.4.2.4
4.4.3
4.4.3.1
4.4.3.2
4.4.3.3
4.4.3.4
4.4.4
4.5
4.5.1
4.5.1.1
4.5.1.2
4.5.1.3
4.6
4.6.1
4.6.2
4.7
4.7.1
4.7.2
4.7.2.1
4.7.2.2
4.7.2.3
4.7.2.4
4.8
4.9
4.9.1
4.9.2
4.9.3
4.9.4
4.10
4.10.1
4.10.2
4.11
4.11.1
4.11.2
5
5.1
5.1.1
5.2
Semiconductor Group
Monitoring Transmission Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
Chip Internal Test Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185
Test Loop-Backs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186
Chip Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193
Access to Power Status Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194
Access to Power Controller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . .196
S/G Bit and BAC Bit Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198
Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206
Interrupt Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
Detailed Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210
State Machine in LT Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
State Machine in NT Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160
State Machine in Repeater Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . .173
Block Error Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185
Receiver Coefficient Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185
Analog Loop-Back (No. 1/No. 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187
Partial and Complete Loop-Back (No. 2) . . . . . . . . . . . . . . . . . . . . . . . .188
Monitoring Primary and Secondary NT Power Supply . . . . . . . . . . . . .194
Monitoring Remote Power Feed Circuit in LT Modes . . . . . . . . . . . . . .194
Monitoring Power Feed Current in LT Modes . . . . . . . . . . . . . . . . . . . .194
Access to Pin DISS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195
Data Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196
Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197
State Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200
Indication of S/G Bit Status on Pin SG . . . . . . . . . . . . . . . . . . . . . . . . .205
Monitor-Channel Interrupt Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
LT Modes State Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
Transition Criteria in LT Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Output Signals and Indications in LT Modes . . . . . . . . . . . . . . . . . . .154
LT States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156
NT Modes State Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
Transition Criteria in NT Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163
Output Signals and Indications in NT Modes . . . . . . . . . . . . . . . . . . .167
NT States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168
NEBE Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
FEBE Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179
Testing Block Error Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
Complete Loop-Back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189
Single-Channel Loop-Backs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190
Repeater Loop-Back (No. 1A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190
Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191
6
Data Sheet 01.99
PEB 2091
PEF 2091
Page
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