User`s manual

QDK™

Renesas RX with HEW

state-machine.com/rx

Figure 10: RX exception processing

After vectoring to the Interrupt Service Routine (ISR), the software takes over (see the next section). The

software returns from the ISR by executing the

RTE

instruction (or

RTFI

for the fast interrupt), at which

point the hardware takes over and executes the hardware post processing. This atomic sequence

consists of restoring the PSW and PC from the stack and resuming the interrupted program.

15 of 32