
Z8018x
Family MPU User Manual
76
UM005003-0703
The TRAP interrupt occurs if an invalid instruction is fetched
during Mode 0 interrupt acknowledge. (Reference Figure 36.)
Figure 36. INT0 Mode 0 Timing Diagram
INT0 Mode 1
When INT0 is received, the PC is stacked and instruction execution
restarts at logical address
0038H. Both IEF1 and IEF2 flags are reset to 0,
Note:
Phi
A0
–
A19
WR
RD
MREQ
D0
–
D7
M1
IORQ
T1
T3
Ti
Ti
TW
T2
T1
T2
T3
T1
T2 T3
TW
PC is pushed onto stack
RST instruction execution
INT0 acknowledge cycle
Last MC
PC
SP-1
SP-2
PCH
PCL
RST instruction
MC: Machine Cycle
*Two Wait States are automatically inserte
*
*
INT0
Kommentare zu diesen Handbüchern