AMX TXC16 Plus Manual do Utilizador Página 179
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¡ Semiconductor MSM82C59A-2RS/GS/JS
FEDL82C59A-2-03
IS7 IS6 IS5 IS4 IS3 IS2 IS1 IS0
0 1 0 1 0 0 0 0
7 6 5 4 3 2 1 0
Lowest Highest
IS Status
Priority Status
Before Rotation
(IR4 the highest priority requesting service)
IS7 IS6 IS5 IS4 IS3 IS2 IS1 IS0
0 1 0 0 0 0 0 0
2 1 0 7 6 5 4 3
Lowest
Highest
IS Status
Priority Status
After Rotation
(IR4 was serviced, all other priorities rotated correspondingly)
(11) Specific Rotation (Specific Priority)
All priority levels can be changed by programming the lowest priority level (Set Priority
Command in OCW2). For example, if IR5 is programmed as the device of lowest priority,
IR6 will have the highest priority. In this mode, the internal status can be updated during
OCW2 by software control. This is unrelated, however, to the EOI command in the same
OCW2.
Priority level can also be changed by using the OCW2 Rotate On Specific EOI command.
(12) Interrupt Mask
Interrupt inputs can be masked individually by Interrupt Mask Registers (IMR)
programmed through the OCW1. Each interrupt channel is masked (disabled) when the
respective IMR bit is set to “1”. IR0 is masked by bit 0, and IR1 is masked by bit 1. Masking
of any particular channel has no effect on other channels.
- COE305 1
- Lab Manual 1
- Microcomputer Systems Design 2
- Table of Contents 3
- 8086 Microprocessor System 4
- Interfacing the Clock 5
- Generator to the CPU 5
- 1.4 Procedure 6
- MXMN / (pin 33) 7
- Designing the Bus System 8
- 2.4 Procedure 9
- COE305 LAB MANUAL 10
- Designing the Memory 11
- 3.4 Procedure 12
- EMR ), memory write 13
- Interfacing I/O Ports 15
- 4.4 Procedure 16
- Testing the 80806 18
- Microcomputer System 18
- 5.2 Equipment 19
- 5.3 Procedure 19
- 5.4 Debugging the System 21
- Exercises 22
- Flight 8086 Training Board 24
- 1.1 Background 25
- 26
- 1.4 The First Program 27
- -M W 0050:0100 29
- 0050:0100 0002 0005 29
- 0050:0102 0003 0007 29
- 0050:0104 0005 29
- Conducting Simple I/O 33
- Operations Using Flight 86 33
- Training Kit 33
- 2.1 Background 34
- 2.2 The Application Board 34
- Table 2.1: Mode Switches 35
- Application Board 37
- Generating Timing 40
- Sequences 40
- 3.1 Background 41
- 3.2 Software Delays 41
- and segment) of 47
- Experiment 50
- 4.1 Background 51
- 4.2 A/D Conversion 51
- 4.3 D/A Conversion 53
- Controlling DC Motors 57
- 5.1 DC Motor 58
- Interfacing a Hyper 62
- Terminal to the Flight 86 62
- 6.1 Background 63
- Table 6.1: 8251 Status Word 65
- Mini Project 69
- Appendices 70
- 16-BIT HMOS MICROPROCESSOR 71
- 8086/8086-2/8086-1 71
- ). Only the pin 75
- FUNCTIONAL DESCRIPTION 76
- General Operation 76
- MINIMUM AND MAXIMUM MODES 77
- 231455–5 78
- 231455–6 78
- 231455–8 79
- External Interface 80
- 231455–9 81
- Basic System Timing 82
- ABSOLUTE MAXIMUM RATINGS* 84
- D.C. CHARACTERISTICS (8086: T 84
- A.C. CHARACTERISTICS (8086: T 85
- TIMING RESPONSES 86
- WAVEFORMS 87
- WAVEFORMS (Continued) 88
- A.C. CHARACTERISTICS 89
- MAXIMUM MODE 92
- 231455–15 92
- 231455–21 95
- Mnemonics 96
- Intel, 1978 96
- offset-high 99
- DATA SHEET REVISION REVIEW 100
- CMOS Clock Generator Driver 101
- Functional Diagram 102
- Pin Description 103
- Functional Description 104
- Die Characteristics 105
- DC Electrical Specifications V 105
- Capacitance T 105
- Operating Conditions 105
- AC Electrical Specifications V 106
- Timing Waveforms 107
- Test Load Circuits 108
- Burn-In Circuits 109
- Sales Office Headquarters 110
- Metallization Mask Layout 110
- DM74LS373/DM74LS374 111
- Edge-Triggered Flip-Flops 111
- Function Tables 112
- DM54/74LS373 112
- DM54/74LS374 112
- Logic Diagrams 113
- 5 www.fairchildsemi.com 115
- 7 www.fairchildsemi.com 117
- DM74LS245 118
- 3-STATE Octal Bus Transceiver 118
- Electrical Characteristics 119
- Switching Characteristics 120
- ¡ Semiconductor 121
- CIRCUIT CONFIGURATION 122
- PIN CONFIGURATION (TOP VIEW) 123
- ABSOLUTE MAXIMUM RATINGS 124
- OPERATING RANGE 124
- RECOMMENDED OPERATING RANGE 124
- DC CHARACTERISTICS 124
- AC CHARACTERISTICS 125
- TIMING DIAGRAM 126
- PIN DESCRIPTION 129
- Mode definition of group A 131
- FUNCTIONAL BLOCK DIAGRAM 145
- OPERATING RANGES 147
- TIMING CHART 149
- DESCRIPTION OF PIN FUNCTIONS 150
- SYSTEM INTERFACING 150
- DESCRIPTION OF OPERATION 151
- FEDL82C59A-2-03 161
- BLOCK DIAGRAM 161
- INTA Sequence (85 mode) 166
- INTA Sequence (86 mode) 166
- PIN FUNCTION DESCRIPTION 167
- SYSTEM INTERFACE 168
- BASIC OPERATION DESCRIPTION 168
- OPERATION DESCRIPTION 169
- Before Rotation 179
- After Rotation 179
- FUNCTION 188
- ABSOLUTE MAXIMUM RATING 196
- OPERATING RANGE 196
- DC CHARACTERISTICS 196
- CPU Bus Interface Part 197
- Serial Interface Part 198
- Data Out Active 200
- Data Float Data Float 200
- START BIT 201
- STOP BIT 201
- (Note 2) 202
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