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MC68302FC20 Datasheet(PDF) 13 Page - Motorola, Inc

Part No. MC68302FC20
Description  Integrated Multiprotocol Processor User’s Manual
Download  480 Pages
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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MC68302FC20 Datasheet(HTML) 13 Page - Motorola, Inc

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Table of Contents
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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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