tmp88f846ug TOSHIBA Semiconductor CORPORATION, tmp88f846ug Datasheet - Page 44

• Manufacturer Part Number: tmp88f846ug
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3.4 Software Interrupt (INTSW)
3. Interrupt Control Circuit
3.4 Software Interrupt (INTSW)
3.4.1 Address error detection
3.4.2 Debugging
is highest prioritized interrupt). However, if processing of a non-maskable inerrupt is already underway, executing
the SWI instruction will not generate a software interrupt but will result in the same operation as the NOP instruc-
tion.
Executing the SWI instruction generates a software interrupt and immediately starts interrupt processing (INTSW
Use the SWI instruction only for detection of the address error or for debugging.
memory address during single chip mode. Code FFH is the SWI instruction, so a software interrupt is gener-
ated and an address error is detected. The address error detection range can be further expanded by writing
FFH to unused areas of the program memory. Address trap reset is generated in case that an instruction is
fetched from RAM, DBR or SFR areas.
address.
FFH is read if for some cause such as noise the CPU attempts to fetch an instruction from a non-existent
Debugging efficiency can be increased by placing the SWI instruction at the software break point setting
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