Intel® IXP400 Software
Access-Layer Components: Synchronous Serial Port (IxSspAcc) API
Programmer’s Guide IXP400 Software Version 2.0 April 2005
Document Number: 252539, Revision: 007 279Figure 93. Interrupt Scenario

B4389-01

Client SspAcc
ixSspAccInit: return
hardware
ixSspAccInit
interrupt: RxFIFOHitOrAboveThreshold
ixSspAccFIFODataReceive

Rx handler

ixSspAccFIFODataReceive: return

Data processing

RxFIFOIntrHandler
RxFIFOIntrHandler: return
interrupt: clear RxFIFOHitOrAboveThreshold
interrupt: TxFIFOHitOrBelowThreshold
TxFIFOIntrHandler
ixSspAccFIFODataSubmit
ixSspAccFIFODataSubmit: return
TxFIFOIntrHandler: return
interrupt : clear TxFIFOHitOrBelowThreshold

Tx handler init

Rx FIFO Overrun handler

interrupt: RxFIFOOverrun
ixSspAccFIFODataReceive
ixSspAccFIFODataReceive: return

Data processing/

loss data recovery

RxFIFOOverrunHandler
RxFIFOOverrunHandler: return
interrupt: clear RxFIFOOverrun