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MPC8260 PowerQUICC II User’s Manual
MOTOROLA
CONTENTS
Paragraph
Number
Title
Page
Number
Chapter 21
SCC HDLC Mode
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
21.10
21.11
21.12
21.13
21.13.1
21.13.2
21.14
21.14.1
21.14.2
21.14.3
21.14.4
21.14.5
21.14.6
21.14.6.1
21.14.6.2
SCC HDLC Features..........................................................................................21-2
SCC HDLC Channel Frame Transmission.........................................................21-2
SCC HDLC Channel Frame Reception..............................................................21-3
SCC HDLC Parameter RAM .............................................................................21-3
Programming the SCC in HDLC Mode .............................................................21-5
SCC HDLC Commands .....................................................................................21-5
Handling Errors in the SCC HDLC Controller ..................................................21-6
HDLC Mode Register (PSMR)..........................................................................21-7
SCC HDLC Receive Buffer Descriptor (RxBD)................................................21-8
SCC HDLC Transmit Buffer Descriptor (TxBD) ............................................21-11
HDLC Event Register (SCCE)/HDLC Mask Register (SCCM)......................21-12
SCC HDLC Status Register (SCCS)................................................................21-14
SCC HDLC Programming Examples...............................................................21-14
SCC HDLC Programming Example #1 .......................................................21-15
SCC HDLC Programming Example #2 .......................................................21-16
HDLC Bus Mode with Collision Detection .....................................................21-17
HDLC Bus Features .....................................................................................21-19
Accessing the HDLC Bus.............................................................................21-19
Increasing Performance................................................................................21-20
Delayed RTS Mode......................................................................................21-21
Using the Time-Slot Assigner (TSA)...........................................................21-22
HDLC Bus Protocol Programming ..............................................................21-23
Programming GSMR and PSMR for the HDLC Bus Protocol................21-23
HDLC Bus Controller Programming Example........................................21-23
Chapter 22
SCC BISYNC Mode
22.1
22.2
22.3
22.4
22.5
22.6
22.7
22.8
22.9
22.10
22.11
Features...............................................................................................................22-2
SCC BISYNC Channel Frame Transmission.....................................................22-2
SCC BISYNC Channel Frame Reception..........................................................22-3
SCC BISYNC Parameter RAM..........................................................................22-3
SCC BISYNC Commands..................................................................................22-5
SCC BISYNC Control Character Recognition...................................................22-6
BISYNC SYNC Register (BSYNC)...................................................................22-7
SCC BISYNC DLE Register (BDLE)................................................................22-8
Sending and Receiving the Synchronization Sequence......................................22-9
Handling Errors in the SCC BISYNC................................................................22-9
BISYNC Mode Register (PSMR).....................................................................22-10