Freescale Semiconductor StarCore SC140 - Manual (Page 236)

5-56 SC140 DSP Core Reference Manual
Exception Processing
The following pipeline table shows the first case in Example 5-17. ES0 is a JMP with a minimum cycle
count of three. ES1 and ES2 are not change-of-flow instructions. And, I1 is the first instruction at the
exception vector address. The exception request is initiated in cycle 4.
Table 5-21. Pipeline Example
Operation
Instruction Cycle
1 2 3 4 5 6 7 8 9 10 11 12
Pre-fetch ES0 ES1 ES2 I1
Fetch ES0 ES1 ES2 I1
Decode ES0 ES1 ES2 push I1
Address
Generation
ES0 ES1 ES2 push I1
Execute ES0 ES1 ES2 push I1