
ML62Q1000 Series User's Manual
Chapter 5 Interrupts
FEUL62Q1000
5-40
5.3.1 Maskable Interrupt Processing
When an interrupt is generated with MIE set to "1", the following process is executed by hardware and the CPU goes to
the interrupt routine.
1.
Save the program counter (PC) in ELR1.
2.
Save CSR in ECSR1 (not processed if the program memory size is 64 Kbytes or less).
3.
Save PSW in EPSW1.
4.
Set ELEVEL of PSW to "1".
5.
Reset the MIE flag to "0".
6.
Set CSR to "0" (not processed if the program memory size is 64 Kbytes or less).
7.
Transfer the value of the interrupt vector address to the program counter (PC).
5.3.2 Non-Maskable Interrupt Processing
When an interrupt occurs, the following process is executed by hardware and the CPU goes to the interrupt routine
regardless of the value of MIE.
1.
Save the program counter (PC) in ELR2.
2.
Save CSR in ECSR2 (not processed if the program memory size is 64 Kbytes or less).
3.
Save PSW fin EPSW2.
4.
Set ELEVEL of PSW to "2".
5.
Set CSR to "0" (not processed if the program memory size is 64 Kbytes or less).
6.
Transfer the value of the interrupt vector address to the program counter (PC).
5.3.3 Software Interrupt Processing
The software interrupt is arbitrarily produced in software.
When the SWI instruction is performed within the program, a software interrupt occurs, the following process is
performed by hardware, and the CPU goes to the software interrupt routine. The vector table is specified with the SWI
instruction.
1.
Save the program counter (PC) in ELR1.
2.
Save CSR in ECSR1 (not processed if the program memory size is 64 Kbytes or less).
3.
Save PSW in EPSW1.
4.
Set ELEVEL of PSW to "1".
5.
Set the MIE flag to "0".
6.
Set CSR to "0" (not processed if the program memory size is 64 Kbytes or less).
7.
Transfer the value of the interrupt vector address to the program counter (PC).
See "nX-U16/100 Core Instruction Manual" for MIE, the program counter (PC), ELR1, CSR, ECSR1, PSW, EPSW1,
ELEVEL, ELR2, ECSR2, EPSW2 and vector table.
Summary of Contents for ML62Q1000 Series
Page 17: ...Chapter 1 Overview...
Page 112: ...Chapter 2 CPU and Memory Space...
Page 154: ...Chapter 3 Reset Function...
Page 166: ...Chapter 4 Power Management...
Page 196: ...Chapter 5 Interrupts...
Page 248: ...Chapter 6 Clock generation Circuit...
Page 274: ...Chapter 7 Low Speed Time Base Counter...
Page 291: ...Chapter 8 16 Bit Timer...
Page 320: ...Chapter 9 Functional Timer FTM...
Page 382: ...Chapter 10 Watchdog Timer...
Page 402: ...Chapter 11 Serial Communication Unit...
Page 456: ...Chapter 12 I2 C Bus Unit...
Page 491: ...Chapter 13 I2 C Master...
Page 512: ...Chapter 14 DMA Controller...
Page 531: ...Chapter 15 Buzzer...
Page 550: ...Chapter 16 Simplified RTC...
Page 559: ...Chapter 17 GPIO...
Page 594: ...Chapter 18 External Interrupt Function...
Page 612: ...Chapter 19 CRC Generator...
Page 632: ...Chapter 20 Analog Comparator...
Page 644: ...Chapter 21 D A Converter...
Page 655: ...Chapter 22 Voltage Level Supervisor...
Page 676: ...Chapter 23 Successive Approximation Type A D Converter...
Page 709: ...Chapter 24 Regulator...
Page 714: ...Chapter 25 Flash Memory...
Page 743: ...Chapter 26 Code Option...
Page 750: ...Chapter 27 LCD Driver...
Page 788: ...Chapter 28 On Chip Debug Function...
Page 795: ...Chapter 29 Safety Function...
Page 813: ...Appendix A...
Page 881: ...Revision History...