External
Oscillator
AD15:0
ALE
CLKOUT
80C186
Modular
Core
RESOUT
WR
RD
BUSY
ERROR
PEREQ
NCS
Figure 14-2. 80C186 Modular Core Family/80C187 System Configuration
MATH COPROCESSING
Latch
A1
A2
EN
CLK
80C187
RESET
NPWR
NPRD
BUSY
ERROR
PEREQ
NPS1
D15:0
1
CKM
2
NPS2
A1254-01
14-9