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1
Introduction
1
2
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80C186XL/80C188XL
1
Microprocessor
1
User’s Manual
1
80C186XL/80C188XL
2
Microprocessor
2
© INTEL CORPORATION, 1995
3
CONTENTS
4
EXAMPLES
17
Introduction
18
CHAPTER 1
20
INTRODUCTION
20
1.3.2.1 How to Find
25
Overview of the
28
80C186 Family
28
Architecture
28
CHAPTER 2
30
OVERVIEW OF THE 80C186 FAMILY
30
ARCHITECTURE
30
A1012-0A
31
A1500-0A
32
A1033-0A
33
CS Code Segment
35
DS Data Segment
35
SS Stack Segment
35
ES Extra Segment
35
A1035-0A
38
A1036-0A
39
A1037-0A
40
A1038-0A
41
Free Space
43
A1013-0A
45
• Unsigned binary
48
• Signed binary (integers)
48
• Unsigned packed decimal
48
• Unsigned unpacked decimal
48
2.2.1.4 String Instructions
51
) for source string
52
) for destination string
52
A1015-0A
58
Opcode Mod R/M
59
Displacement
59
A1017-0A
60
A1018-0A
60
A1019-0A
61
A1020-0A
62
A1021-0A
62
A1022-0A
63
A1024-0A
64
Source EA
65
Destination EA
65
component; a 32-bit
66
Floating Point
66
Magnitude
67
A1028-0A
68
A1009-02
69
A1029-0A
71
2.3.1.2 Maskable Interrupts
72
2.3.1.3 Exceptions
72
A1030-0A
75
A1031-0A
76
A1032-0A
77
A1034-0A
78
Bus Interface Unit
80
CHAPTER 3
82
• Address/Status Phase
89
• Data Phase
89
Table 3-1. Bus Cycle Types
93
BUS INTERFACE UNIT
100
3.5.1.1 Refresh Bus Cycles
103
• An interrupt is generated
109
• A bus HOLD is generated
109
• A DMA request is generated
109
Figure 3-25. HALT Bus Cycle
110
NOTES:
112
3.5.6 Exiting HALT
113
Figure 3-29. Exiting HALT
114
• Additional V
115
A1095-0A
116
A1058-0B
117
QS0, QS1
120
3.7.1.1 HOLD Bus Latency
121
Figure 3-36. Latching HLDA
124
Figure 3-37. Exiting HOLD
125
Peripheral Control
128
CHAPTER 4
130
PERIPHERAL CONTROL BLOCK
130
Register Mnemonic: RELREG
131
Function
132
Clock Generation and
138
Power Management
138
CHAPTER 5
140
CLOCK GENERATION AND POWER
140
MANAGEMENT
140
90˚ 180˚90˚
141
Z = Inverter Output Z
141
A1520-0A
142
5.1.1.2 Selecting Crystals
144
A1521-0A
146
A1508-0B
147
in the logic high state. If
148
A1523-0A
149
Register Mnemonic: PWRSAV
151
T2 T3 T4
152
Chip-Select Unit
154
CHAPTER 6
156
CHIP-SELECT UNIT
156
A1168-0A
157
Address Valid
159
Register Mnemonic: UMCS
162
chip-select
162
Register Mnemonic: LMCS
163
Register Mnemonic: MMCS
164
chip-selects
164
Register Mnemonic: PACS
165
Register Mnemonic: MPCS
166
and PCS chip
166
6.4.2.1 UCS Active Range
167
6.4.2.2 LCS Active Range
168
6.4.2.3 MCS Active Range
168
Table 6-4. MCS Active Range
168
A1136-0C
169
6.4.2.4 PCS Active Range
170
Table 6-6. PCS Active Range
170
Device select
173
External Master Chip Select
173
CSU Chip Select
173
Figure 6-13. Typical System
174
Refresh Control Unit
178
A1539-01
180
REFRESH CONTROL UNIT
181
A1502-0A
183
RFTIME equ xxxxh
190
Interrupt Control
194
CHAPTER 8
196
INTERRUPT CONTROL UNIT
196
8.2.1.1 Interrupt Masking
198
8.2.1.2 Interrupt Priority
198
8.2.1.3 Interrupt Nesting
199
INT3 Control 3EH
206
Figure 8-11. Poll Register
215
Interrupt
220
8.5.1.3 Other Registers
223
A1200-A0
225
Timer/Counter Unit
228
CHAPTER 9
230
TIMER/COUNTER UNIT
230
Register Mnemonic: T2CON
238
A1299-0A
239
A1300-0A
240
9.2.3.1 Retriggering
242
T1CMPB equ xxxxH
250
T1CMPA equ xxxxH
251
Direct Memory
254
Access Unit
254
CHAPTER 10
256
DIRECT MEMORY ACCESS UNIT
256
• from I/O space to I/O space
258
10.1.10.1.1 Fixed Priority
263
A1540-01
264
• pointer address
265
Register Mnemonic: DxDSTH
268
Destination pointer
268
Register Mnemonic: DxCON
270
Math Coprocessing
284
CHAPTER 11
286
MATH COPROCESSING
286
A1257-0A
293
A1531-0A
299
ONCE Mode
302
CHAPTER 12
304
ONCE MODE
304
A1532-0A
305
80C186 Instruction
306
Set Additions and
306
Extensions
306
APPENDIX A
308
80C186 INSTRUCTION SET
308
ADDITIONS AND EXTENSIONS
308
Figure A-4)
311
A1003-0A
312
A1004-0A
313
A1005-0A
314
• Data transfer instructions
315
• Arithmetic instructions
315
A.2.3.1 Shift Instructions
316
A.2.3.2 Rotate Instructions
317
Synchronization
318
APPENDIX B
320
INPUT SYNCHRONIZATION
320
Instruction Set
322
Descriptions
322
APPENDIX C
324
INSTRUCTION SET DESCRIPTIONS
324
Table C-4. Instruction Set
327
Opcodes and Clock
372
APPENDIX D
374
INSTRUCTION SET OPCODES
374
AND CLOCK CYCLES
374
Hex Binary
382
Byte 2 Immed Shift Grp1 Grp2
395
2-10, 2-13
402
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