CX28344 Conexant, CX28344 Datasheet - Page 48

• Manufacturer Part Number: CX28344
• Description: (CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
• Manufacturer: Conexant

Functional Description
Figure 2-1. Functional Block Diagram of a Channel
2-2
Shallow
{ } Indicates a programmable control bit.
ONESEC AD A ALE RD WR CS DTACK INTR
Loop
Back
Line
Status Register End Counters
Receiver & Transmitter
Performance Monitoring
RXPOS
RXNEG
LINECK
Source
Microprocessor Interface
MUX
Loop
Back
TXNEG
TXPOS
TCLKO
MUX
Figure 2-1
Control
and Status
Encoder
Decoder
RXCKI
illustrates a single-channel block diagram.
Mindspeed Technologies™
Unipolar
Data
TXCLK
Unipolar
Data
Remote Line
Loop Back
Dejitter
VCO
FIFO
RX
Overhead
Insertion
TXCKI
Framing
and
{RXFIFEN}
MUX
MUX
{TXALM}
MUX
Channel
TEXT
TEXTCK
TXSY
TXGAPCK
FEAC
Frame/Overhead/
RX
RECOVERY
Payload Bit
Frame
Data
Link
Check
Channel
RX
FEAC
Data
Link
FEBE/RAI
Generator
TX
TX
Generator
To Message Byte
and Status Register
in µP Interface
Payload
Pattern
To Message
Buffer and
Status Register
in µP Interface
From Message Buffer
in µP Interface
To Status Register
in µP Interface
From Message Byte
in µP Interface
To Status Register
in µP Interface
TXDATI
CX28342/3/4/6/8 Data Sheet
Generation
RXDAT
FEBE/RAI
Indication
RXMSY
RXGAPCK
REXT
REXTCK
Status/Event
Indications to
µP Interface
Status Registers
and Counters
28348-DSH-001-B
100542_004