MC6800 Motorola, MC6800 Datasheet - Page 20

• Manufacturer Part Number: MC6800
• Description: 8-BIT MICROPROCESSING UNIT (MPU)
• Manufacturer: Motorola

I
n:=.
Software lnterruDt
Main Program’
NOTE: MS= Most Significant Address Bvte;
7“
FFFA
Register Contents
FFF8
FFF9
FFFB
WI
@
Interrupt Memorv Assignment
Stack MPU
LS = Least S~nificant Address Byte;
I
MOTOROLA
Swl
IRQ
Swl
:1=
IRQ
FFF8
FFF9
FIGURE ~
Sp
Main Program
Wait For
Interrupt
#
I
+
Ms
LS
MS
LS
m—6
m—5
m—7
m—2
m—4
m—3
m—1
e
– PROGRAM FLOW FOR INTERRUPTS
m
NonMaskable Interrupt (NMI)
n-
Hardware Interrupt or
20
Semiconductor
Addr. Formed
2. Eytes From
Per, Mere,
Assign.
First Instr.
BvFetching
Main Program
f
d
Q
1 lstlnterruutlnstr.
I
I nterruot Proaram
Program Counter
Mask (CCR 4)
Load Interrupt
Set Interrupt
Products Inc.
Vector Into
,.
A
1
1
FFFC
FFFD
>
FFFE
FFFF
.-