80C86 Datasheet, PDF (3/37 Pages) Intersil Corporation – CMOS 16-Bit Microprocessor

Functional Diagram
EXECUTION UNIT
REGISTER FILE
DATA POINTER
AND
INDEX REGS
(8 WORDS)
80C86
BUS INTERFACE UNIT
RELOCATION
REGISTER FILE
SEGMENT REGISTERS
AND
INSTRUCTION POINTER
(5 WORDS)
16-BIT ALU
FLAGS
BHE/S7
4
A19/S6
A16/S3
16 AD15-AD0
BUS INTERFACE UNIT
3 INTA, RD, WR
4 ^{DT/R, DEN, ALE, M/IO}
6-BYTE
INSTRUCTION
QUEUE
TEST
INTR
NMI
RQ/GT0, 1 2
HOLD
HLDA
CONTROL AND TIMING
LOCK
2
QS0, QS1
3
S2, S1, S0
CLK
3
RESET READY MN/MX GND
V_CC
MEMORY INTERFACE
C-BUS
BUS
INTERFACE
UNIT
B-BUS
ES
CS
SS
DS
IP
INSTRUCTION
STREAM BYTE
QUEUE
A-BUS
EXECUTION UNIT
CONTROL SYSTEM
EXECUTION
UNIT
AH
AL
BH
BL
CH
CL
DH
DL
SP
BP
SI
DI
ARITHMETIC/
LOGIC UNIT
FLAGS
3
FN2957.3
January 9, 2009