C164CM_2 Datasheet, PDF (111/470 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller

C164CM/C164SM
Derivatives
Interrupt and Trap Functions
After an interrupt service routine has been terminated by executing the RETI instruction,
and if further interrupts are pending, the next interrupt service routine will not be entered
until at least two instruction cycles have been executed of the interrupted program. In
most cases, two instructions will be executed during this time. Typically, only one
instruction will be executed if the first instruction following the RETI instruction is a
branch instruction (without cache hit), or if it reads an operand from internal code
memory, or if it is executed from the internal RAM.
Note: A bus access in this context includes all delays which can occur during an external
bus cycle.
User’s Manual
5-21
V1.0, 2002-02