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Figure 7–3. IST With Branch to Additional Interrupt Service Code Located Outside the IST
The interrupt service routine
for INT4 includes this
7-instruction extension of
the interrupt ISFP.
1220h
–
1224h
–
1228h
–
122Ch
–
1230h
–
1234h
Instr9
1238h
B IRP
Instr11
123Ch
1240h
Instr12
1244h
Instr13
1248h
Instr14
124Ch
Instr15
1250h
–
1254h
–
–
1258h
125Ch
–
RESET ISFP
000h
NMI ISFP
020h
Reserved
040h
Reserved
060h
INT4 ISFP
080h
INT5 ISFP
0A0h
INT6 ISFP
0C0h
INT7 ISFP
0E0h
INT8 ISFP
100h
INT9 ISFP
120h
INT10 ISFP
140h
INT11 ISFP
160h
INT12 ISFP
180h
INT13 ISFP
1A0h
INT14 ISFP
1C0h
INT15 ISFP
1E0h
Additional ISFP for INT4
Additional ISFP for INT4
Program memory
Note:
The instruction B 1234h branches into the middle of a fetch packet (at 1220h)
and processes code starting at address 1234h. The CPU ignores code from
address 1220–1230h, even if it is in parallel to code at address 1234h.
IST
Overview of Interrupts
ISFP for INT4
080h
Instr1
084h
Instr2
088h
B 1234h
08Ch
Instr4
090h
Instr5
094h
Instr6
098h
Instr7
09Ch
Instr8
Interrupts
7-7
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