May 2024
Intermediate to advanced
665 pages
23h 2m
English
book
The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
by Lyla B. Das
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
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592 APPENDIX
ASYNCHRONOUS SIGNAL RECOGNITION
CLK
TEST
INTR
NMI
signal
TINVCH (see note 1)
Note: Setup requirements for asynchronous signals only to guarantee recognition at next CLK.
CLK
Any CLK Cycle
TCLAV
LOCK
Any CLK Cycle
TCLAV
V
cc
CLK
RESET
TDVCL
TCLDX
≥4 CLK CYCLES
≥50μ sec
BUS LOCK SIGNAL TIMING (MAXIMUM MODE ONLY) RESET TIMING
CLK
TCLGH
TCLCL
8086
Previous grant
TGVCH
TCHGX
PULSE 3
COPROCESSOR
RELEASE
COPROCESSOR
8086
(SEE NOTE 1)
Any CLK Cycle
PULSE 1
COPROCESSOR
RQ
RQ/GT
TCLAZ
PULSE 2
8086 GT
>0– CLK Cycle
TCLCL
TCLGH
TCLGL
AD
15
–AD
0
A
19
/S
6
–A
16
/S
3
S
2
, S
1
, S
0
RD, LOCK
BHE
/
S7
Note: The coprocessor may not drive the buses outside the region shown without risking contention.
REQUEST/
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