SPRAD28 October 2022 AM2431 , AM2432 , AM2434 , AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1 , AM26C31 , AM26C31-EP , AM26C31M , AM26C32 , AM26C32-EP , AM26C32M , AM26LS31 , AM26LS31M , AM26LS32A , AM26LS32AC , AM26LS32AM , AM26LS33A , AM26LS33A-SP , AM26LS33AM , AM26LV31 , AM26LV31E , AM26LV31E-EP , AM26LV32 , AM26LV32E , AM26LV32E-EP , AM26S10 , AM2732 , AM2732-Q1
Bits | Descriptions | Values |
---|---|---|
31:28 | EXC_RETURN indicator | 0xF |
27:5 | Reserved | 0xEFFFFF |
4 | Stack Frame Type | When FPU is not available, this bit is always 1 |
3 | Return Mode | 1 = Return to Thread
Mode 0 = Return to Handler Mode |
2 | Return Stack | 1 = Return with PSP 0 = Return with MSP |
1 | Reserved | 0 |
0 | Reserved | 1 |
Figure 6-1 shows the flow of the exit sequence.