SAB80C517-M16 SIEMENS [Siemens Semiconductor Group], SAB80C517-M16 Datasheet - Page 165

• Manufacturer Part Number: SAB80C517-M16
• Description: 8-Bit CMOS Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 8-2
Interrupt Source and Vectors
Interrupt Request Flags
IE0
TF0
IE1
TF1
RI0/TI0
TF2/EXF2
IADC
IEX2
IEX3
IEX4
IEX5
IEX6
RI1/TI1
CTF
Execution proceeds from that location until the RETI instruction is encountered. The RETI
instruction informs the processor that the interrupt routine is no longer in progress, then pops the
two top bytes from the stack and reloads the program counter. Execution of the interrupted program
continues from the point where it was stopped. Note that the RETI instruction is very important
because it informs the processor that the program left the current interrupt priority level. A simple
RET instruction would also have returned execution to the interrupted program, but it would have
left the interrupt control system thinking an interrupt was still in progress. In this case no interrupt of
the same or lower priority level would be acknowledged.
Semiconductor Group
Interrupt Vector Address
0003 H
000B H
0013 H
001B H
0023 H
004B H
0053 H
005B H
0063 H
006B H
0083 H
009B H
002B H
0043 H
166
Interrupt Source
External interrupt 0
Timer 0 overflow
External interrupt 1
Timer 1 overflow
Serial channel 0
Timer 2 overflow/ext. reload
A/D converter
External interrupt 2
External interrupt 3
External interrupt 4
External interrupt 5
External interrupt 6
Serial channel 1
Compare timer overflow
Interrupt System