BT8222EPFF CONEXANT [Conexant Systems, Inc], BT8222EPFF Datasheet - Page 4
BT8222EPFF
Manufacturer Part Number
BT8222EPFF
Description
ATM Transmitter/Receiver with UTOPIA Interface
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.BT8222EPFF.pdf
(161 pages)
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2.0
iv
Table of Contents
Functional Description
2.1
2.2
2.3
2.4
2.5
2.6
Microprocessor Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.1.1
2.1.2
Line Framers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2.1
2.2.2
2.2.3
2.2.4
Overhead Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
Status and Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
2.4.1
2.4.2
2.4.3
Parallel Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
2.5.1
2.5.2
2.5.3
ATM Cell Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
8/16-Bit Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Internally Framed Transmit Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2.2.1.1
Internally Framed Receive Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.2.2.1
2.2.2.2
Externally Framed Transmit Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Externally Framed Receive Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Internal DS3 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Internal G.832 E3/E4 Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Internal G.751 E3 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
STS-1 and STS-3c/STM-1 Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Transmit Framing Overhead Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Receive Framing Overhead Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Status and Counter Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Alarm Signal Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Alarm Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
TAXI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Transmit Parallel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Receive Parallel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Cell Generation for Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
2.6.1.1
2.6.1.2
Cell Validation for Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
2.6.2.1
2.6.2.2
2.6.2.3
PLCP Cell Generation for Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
PLCP Cell Validation for Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
2.6.4.1
PLCP Transmit/Receive Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
High-Speed PECL Transmit Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
High-Speed PECL Receive Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Receiver Framing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
CELL_GEN_x Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Cell Generation Status and Status Interrupts for Transmit . . . . . . . . . . . . . . . 2-28
HEC Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
CELL_VAL Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Interrupts and Status Counters for Cell Validation . . . . . . . . . . . . . . . . . . . . . 2-32
PLCP Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Conexant
ATM Transmitter/Receiver with UTOPIA Interface
CN8223
100046C
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