Altera Corporation
vii
Contents
User Guide
Specifications
General Description..........................................................................................................................9
Features............................................................................................................................................10
Receive Features......................................................................................................................10
Transmit Features...................................................................................................................10
Functional Description...................................................................................................................11
Receiver Description...............................................................................................................12
RXHDLC ..............................................................................................................12
Descrambling...............................................................................................13
Processing ....................................................................................................13
FCS 16/ 32.....................................................................................................13
FCS Deletion................................................................................................13
Transmitter Description.........................................................................................................13
TXHDLC...............................................................................................................14
Processing ....................................................................................................14
FCS 16/ 32.....................................................................................................14
Scrambling ...................................................................................................14
Interfaces & Protocols.............................................................................................................14
Midbus..................................................................................................................14
AIRbus..................................................................................................................15
Atlantic.................................................................................................................15
Data Ordering......................................................................................................15
Transparency .......................................................................................................16
Pin-Outs............................................................................................................................................16
Performance.....................................................................................................................................18
Software Interface...........................................................................................................................18
Memory Map...........................................................................................................................18
Registers...................................................................................................................................19
RX Register Description.....................................................................................20
RX_CTRL - Receive Control Register -
’
h00............................................20
RX_IS - Receive Interrupt Register -
’
h02.................................................21
RX_IE - Receive Interrupt Enable Register -
’
h04...................................22
RX_PM_GOOD - Receive Good Packet Count -
’
h06............................22
RX_PM_FCS - Receive FCS Error Count -
’
h08.......................................22
RX_PM_ABORT - Receive Abort Count -
’
h0A ......................................22
RX_PM_RUNT - Receive Runt Frame Count -
’
h0C ..............................23