XRT72L52
137
REV. 1.0.3
TWO CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
NOTE: For more information on the LAPD Transmitter, see
4.2
The Transmit Section of the XRT72L52 (DS3 Mode Operation)
When the XRT72L52 has been configured to operate in the DS3 Mode, the Transmit Section of the XRT72L52
consists of the following functional blocks (Figure 29).
Transmit Payload Data Input Interface block
Transmit Overhead Data Input Interface block
Transmit DS3 Framer block
Transmit DS3 HDLC Controller block
Transmit LIU Interface block
FIGURE 29. THE XRT72L52 TRANSMIT SECTION CONFIGURED TO OPERATE IN THE DS3 MODE
Transmit
PayloadData
Input
Interface Block
Transmit
PayloadData
Input
Interface Block
TransmitDS3/E3
Framer Block
TransmitDS3/E3
Framer Block
Transmit LIU
Interface
Block
Transmit LIU
Interface
Block
TransmitDS3
HDLC
Controller/Buffer
TransmitDS3
HDLC
Controller/Buffer
TxPOS
TxNEG
TxLineClk
TxOHFrame
TxOHEnable
TxOH
TxOHClk
TxOHIns
TxOHInd
TxSer
TxNib[3:0]
TxInClk
TxNibClk
TxFrame
TxNibFrame
TxFrameRef
From Microprocessor
Interface Block
Transmit
OverheadInput
Interface Block
Transmit
OverheadInput
Interface Block