Table of Contents
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LIST OF ILLUSTRATIONS
Figure
Number
Title
Page
Number
1-1
MC68302 Block Diagram....................................................... 1-2
1-2
General-Purpose Microprocessor System Design....................
1-4
1-3
MC68302 System Design...................................................... 1-5
1-4
NMSI Communications-Oriented Board Design....................... 1-7
1-5
Basic Rate ISDN Voice/Data Terminal..................................... 1-8
2-1
M68000 Programming Model................................................ 2-2
2-2
M68000 Status Register........................................................ 2-3
2-3
M68000 Bus/Address-Error Exception Stack Frame.................. 2-11
2-4
M68000 Short-Form Exception Stack Frame............................ 2-12
2-5
MC68302 IMP Configuration Control...................................... 2-14
3-1
IDMA Controller Block Diagram............................................. 3-4
3-2
Interrupt Controller Block Diagram ...... ...... . .. .. ...... ... . .. .... .. ... .. 3-18
3-3
Parallel 1/0 Port Registers..................................................... 3-32
3-4
RAM Block Diagram............................................................. 3-33
3-5
Timer Block Diagram............................................................ 3-34
3-6
Chip-Select Block Diagram .................................................... 3-41
3-7
Using an External Crystal ..................................................... 3-46
3-8
System Control Register....................................................... 3-47
3-9
IMP Bus Arbiter................................................................... 3-52
4-1
Serial Channels Physical Interface Block Diagram.................... 4-6
4-2
IDL Bus Signals................................................................... 4-7
4-3
GCI Bus Signals................................................................... 4-10
4-4
PCM Bus Signals ................................................................. 4-13
4-5
SCC Block Diagram .............................................................. 4-19
4-6
SCC Baud Rate Generator..................................................... 4-21
4-7
Memory Structure................................................................ 4-25
4-8
SCC Buffer Descriptor Format............................................... 4-26
4-9
UART Control Characters Table............................................. 4-39
4-10
UART Receive Buffer Descriptor............................................ 4-45
4-11
UART Transmit Buffer Descriptor.......................................... 4-48
4-12
HDLC Receive Buffer Descriptor............................................ 4-61
MOTOROLA
MC68302 USER'S MANUAL
xi
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