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MC68302 Datasheet(PDF) 13 Page - Motorola, Inc |
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MC68302 Datasheet(HTML) 13 Page - Motorola, Inc |
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13 / 480 page  Table of Contents Paragraph Title Page Number Number MOTOROLA MC68302 USER’S MANUAL xiii D.3.2 MC68302 Buffer Processing ...................................................................D-8 D.3.3 New Pointers ...........................................................................................D-9 D.3.4 Initial Conditions ....................................................................................D-10 D.3.5 Transmit Algorithm ................................................................................D-10 D.3.6 Interrupt Routine....................................................................................D-10 D.3.7 Final Comments ....................................................................................D-11 D.3.8 HDLC Code Listing................................................................................D-11 D.4 Configuring A Uart on the MC68302 .....................................................D-17 D.4.1 Purpose of the Code .............................................................................D-17 D.4.2 Organization of Buffers..........................................................................D-18 D.4.3 Assumptions about the System.............................................................D-19 D.4.4 UART Features Not Discussed .............................................................D-19 D.4.5 UART Code Listing................................................................................D-19 D.5 Independent DMA in the MC68302 .......................................................D-23 D.5.1 IDMA Overview .....................................................................................D-23 D.5.2 IDMA Software Initialization ..................................................................D-24 D.5.3 IDMA Bus Arbitration Signals ................................................................D-24 D.5.4 Triggering External IDMA Transfers......................................................D-24 D.5.5 Performing Internally Generated IDMA Transfers .................................D-24 D.5.6 External Cycles Examples.....................................................................D-26 D.5.7 Internal Interrupt Sequence...................................................................D-29 D.5.8 Final Notes ............................................................................................D-30 D.6 MC68302 Multiprotocol Controller Tied to IDL Bus Forms and ISDN Voice/data Terminal.....................................................................D-30 D.6.1 M68000 Core.........................................................................................D-31 D.6.2 Communications Processor ..................................................................D-31 D.6.3 System Integration Block.......................................................................D-31 D.6.4 IDL Bus..................................................................................................D-31 D.6.5 IDL Bus Specification ............................................................................D-32 D.6.6 IMP/IDL Interconnection........................................................................D-33 D.6.7 Serial Interface Configuration................................................................D-35 D.6.8 SCC Configuration ................................................................................D-36 D.6.9 Parallel l/O Port A Configuration ...........................................................D-37 D.6.10 SCP Bus................................................................................................D-37 D.6.11 SCP Configuration.................................................................................D-38 D.6.12 SCP Data Transactions.........................................................................D-38 D.6.13 Additional IMP To S/T Chip Connections ..............................................D-39 D.6.14 Initialization of the MC145475 ...............................................................D-40 D.6.15 MC145554 CODEC Filter......................................................................D-41 D.7 Interfacing a Master MC68302 to One or More Slave MC68302s ........D-41 D.7.1 Synchronous vs. Asynchronous Accesses............................................D-43 D.7.2 Clocking.................................................................................................D-43 D.7.3 Programming the Base Address Registers (BARs)...............................D-43 D.7.4 Dealing with Interrupts...........................................................................D-44 D.7.5 Arbitration ..............................................................................................D-44 |
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