ML620Q503/Q504 User's Manual
Chapter 5 Interrupts
FEUL620Q504 5–56
Status B: Non-maskable interrupt is being processed
B-1: When no instruction is executed in an interrupt routine
•Processing immediately after the start of interrupt routine execution
Specify the RTI instruction to return the contents of the ELR register to the PC and those of the
EPSW register to PSW.
B-2: When one or more instructions are executed in an interrupt routine
B-2-1: When a subroutine is not called by the program in executing an interrupt routine
•Processing immediately after the start of interrupt routine execution
Specify "PUSH ELR, EPSW" to save the interrupt return address and the PSW status in the stack.
•Processing at the end of interrupt routine execution
Specify "POP PC, PSW" instead of the RTI instruction to return the saved data of the interrupt
return address to PC and the saved data of EPSW to PSW.
B-2-2: When a subroutine is called by the program in executing an interrupt routine
•Processing immediately after the start of interrupt routine execution
Specify "PUSH LR, ELR, EPSW" to save the interrupt return address, the subroutine return
address, and the EPSW status in the stack.
•Processing at the end of interrupt routine execution
Specify "POP PC, PSW, LR" instead of the RTI instruction to return the saved data of the interrupt
return address to PC, the saved data of EPSW to PSW, and the saved data of LR to LR.
Example of
description: Status
B-1
Example of
description: B-2-1
Intrpt_B-1:
; B-1 state
Intrpt_B-2-1:
; Start
RTI
; Return PC from ELR
PUSH ELR,
EPSW
; Save ELR and EPSW at the
beginning
; Return PSW form EPSW
; End
:
:
:
POP PC, PSW
; Return PC from the stack
; Return PSW from the stack
; End
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...