Motorola MC68824 Manuals

Manuals and User Guides for Motorola MC68824. We have 1 Motorola MC68824 manual available for free PDF download: User Manual

Motorola MC68824 User Manual

Motorola MC68824 User Manual (158 pages)

Token-Passing Bus Controller  
Brand: Motorola | Category: Controller | Size: 6.31 MB
Table of contents
Table Of Contents2................................................................................................................................................................
Introduction14................................................................................................................................................................
Features14................................................................................................................................................................
150/051 Reference Model15................................................................................................................................................................
Ieee Local Area Network Standards16................................................................................................................................................................
Ieee 802.4 Token Bus Local Area Networks16................................................................................................................................................................
Token Bus Operation16................................................................................................................................................................
Options Within Ieee17................................................................................................................................................................
Physical Layer Interface18................................................................................................................................................................
Microprocessor System Bus Interface18................................................................................................................................................................
Token Bus Lan Node18................................................................................................................................................................
Shared Memory19................................................................................................................................................................
Overview Of Tbc Functional Operation19................................................................................................................................................................
Command Structure Overview19................................................................................................................................................................
Frame Reception Overview19................................................................................................................................................................
Frame Transmission Overview20................................................................................................................................................................
Tables 2.1 Tbc Private Area22................................................................................................................................................................
Next Station Address22................................................................................................................................................................
Data Organization In Memory22................................................................................................................................................................
Tbc Private Area22................................................................................................................................................................
Previous Station Address24................................................................................................................................................................
Last Token-rotation-time24................................................................................................................................................................
Token Rotation Time At Start Of Access Classes25................................................................................................................................................................
Target Token Rotation Time For Access Classes25................................................................................................................................................................
Token Rotation Time At Start Of Ring Maintenance25................................................................................................................................................................
Target Rotation Time For Ring Maintenance25................................................................................................................................................................
Ring Maintenance Time Initial Value26................................................................................................................................................................
Source Routing - Source Segment/bridge 10 (sid)26................................................................................................................................................................
Source Routing - Target Segment/bridge 10 (tid)26................................................................................................................................................................
Segment Number Mask For Source Routing26................................................................................................................................................................
Rx Frame Status Error Mask27................................................................................................................................................................
Tx Queue Access Class Status27................................................................................................................................................................
Tx Queue Access Class Pointers27................................................................................................................................................................
Rx Queue Access Class Pointers27................................................................................................................................................................
Free Frame Descriptor Pointer28................................................................................................................................................................
Free Buffer Descriptor Pointer28................................................................................................................................................................
Group Address Mask28................................................................................................................................................................
Individual Address Mask29................................................................................................................................................................
Non-rwr Maximum Retry Limit29................................................................................................................................................................
Rwr Maximum Retry Limit30................................................................................................................................................................
Slot Time30................................................................................................................................................................
Manufacturer Product Revision And 802.4 Standard Revision Number30................................................................................................................................................................
Transmitter Fault Count31................................................................................................................................................................
Private Area Function Code31................................................................................................................................................................
Private Area Pointer31................................................................................................................................................................
Parameters Initializing The Private Area31................................................................................................................................................................
Initial Pad Timer Preset (ptp)34................................................................................................................................................................
Initial In-ring Desired34................................................................................................................................................................
Initial Address Length34................................................................................................................................................................
Response Destination Address Pointer34................................................................................................................................................................
Response Pointer34................................................................................................................................................................
Request With Response Pointer35................................................................................................................................................................
Command Parameter Area35................................................................................................................................................................
Interrupt Status Words36................................................................................................................................................................
Interrupt Status Word 138................................................................................................................................................................
Interrupt Masks40................................................................................................................................................................
Statistics40................................................................................................................................................................
Number Of Tokens Passed41................................................................................................................................................................
Number Of Tokens Heard41................................................................................................................................................................
Number Of Passes Through No Successor 841................................................................................................................................................................
Number Of Who Follows41................................................................................................................................................................
Number Of Token Pass Failed41................................................................................................................................................................
Number Of Frames Too Long (>8k Bytes)41................................................................................................................................................................
Number Of No Fd/bd Errors41................................................................................................................................................................
Number Of Overruns42................................................................................................................................................................
Modem Error Counters42................................................................................................................................................................
Non-silence42................................................................................................................................................................
Fcs Errors42................................................................................................................................................................
E-bit Errors42................................................................................................................................................................
Frame Fragments42................................................................................................................................................................
Dma Dump Area42................................................................................................................................................................
Commands44................................................................................................................................................................
Registers45................................................................................................................................................................
Tbc Register Map46................................................................................................................................................................
Command Register (cr)46................................................................................................................................................................
Data Register (dr)46................................................................................................................................................................
Interrupt Vector Register (iv)47................................................................................................................................................................
Semaphore Register47................................................................................................................................................................
Initialization Table58................................................................................................................................................................
Buffer Structures74................................................................................................................................................................
Linked Buffer Structures74................................................................................................................................................................
Tbc Queues75................................................................................................................................................................
Frame Descriptor Format76................................................................................................................................................................
Buffer Descriptor Format80................................................................................................................................................................
Examples Of Queues Status83................................................................................................................................................................
Free Frame Descriptor And Buffer Descriptor Pools85................................................................................................................................................................
Mc68824 Signals93................................................................................................................................................................
Data Strobe Control Of Data Bus In Master Mode94................................................................................................................................................................
Request Channel Encodings For Mac Mode (smreq = 1)97................................................................................................................................................................
Indication Channel Encodings For Mac Mode (smind = 1)98................................................................................................................................................................
Typical Station Management Sequence99................................................................................................................................................................
Bus Operation102................................................................................................................................................................
Host Processor Read Cycle With Two Wait States103................................................................................................................................................................
Host Processor Write Cycle103................................................................................................................................................................
Interrupt Acknowledge Cycle104................................................................................................................................................................
Read Cycle And Slow Read Cycle105................................................................................................................................................................
Write Cycle And Slow Write Cycle106................................................................................................................................................................
Bec Encoding Definitions106................................................................................................................................................................
Tbc Write Cycle With Halt107................................................................................................................................................................
Tbc Read Cycle With Bus Error108................................................................................................................................................................
Tbc Read Cycle With Retry108................................................................................................................................................................
Tbc Read Cycle With Relinquish And Retry, Early And Late109................................................................................................................................................................
Bus Arbitration110................................................................................................................................................................
Bus Arbitration Unit State Diagram112................................................................................................................................................................
Bus Timing Diagram113................................................................................................................................................................
Tbcinterfaces114................................................................................................................................................................
Electrical Specifications118................................................................................................................................................................
Ordering Information And Mechanical Data132................................................................................................................................................................
Ieee 802.4 Operation136................................................................................................................................................................
Frame Formats And Addressing140................................................................................................................................................................

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