MB91F467DA datasheet(24/140 Pages) FUJITSU

24 / 140 page

MB91460D Series

DS07-16612-2E

■ NOTES ON DEBUGGER

Execution of the RETI Command

If single-step execution is used in an environment where an interrupt occurs frequently, the corresponding

interrupt handling routine will be executed repeatedly to the exclusion of other processing. This will prevent the

main routine and the handlers for low priority level interrupts from being executed (For example, if the time-base

timer interrupt is enabled, stepping over the RETI instruction will always break on the first line of the time-base

timer interrupt handler).

Disable the corresponding interrupts when the corresponding interrupt handling routine no longer needs debug-

ging.

Break function

If the range of addresses that cause a hardware break (including event breaks) is set to the address of the

current system stack pointer or to an area that contains the stack pointer, execution will break after each

instruction regardless of whether the user program actually contains data access instructions.

To prevent this, do not set (word) access to the area containing the address of the system stack pointer as the

target of the hardware break (including an event breaks).

Operand break

It may cause malfunctions if a stack pointer exists in the area which is set as the DSU operand break. Do not

set the access to the areas containing the address of system stack pointer as a target of data event break.

MB91F467DA Datasheet(PDF) 24 Page - fujitsu semiconductor