Forced Breaks - Oki Dr.63514 User Manual

Chapter 2. Functions
When a register stack push/pop is performed, if the emulator detects a stack pointer overflow
or underflow, then it will output a register stack overflow break request.
________________________________________________________________________________________________________________________________
___________________________________________________________________________________________________________
n Reference n
The stack size appears in the user's manual for the target microcontroller.
________________________________________________________________________________________________________________________________

2.3.2.3 Forced Breaks

Forced breaks are breaks that do not depend on parameters or specific conditions. They force
immediate termination of real-time emulation.
(1) N area access break
An attempt to read an instruction or ROM table data from a code memory address not physically present
produces a break request of this type.
________________________________________________________________________________________________________________
n Note 1 n
The former is especially problematical because the break occurs after the microcontroller
attempts to execute the indeterminate data from the invalid address.
Real-time emulation immediately terminates.
________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________
n Note 2 n
The emulator considers the microcontroller's test data area part of the N area.
________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________
n Note 3 n
2-20
0FFFFH
1000H
(2000H)
Test data area
0FDFH
(1FDFH)
4K words
(8K words)
0000H
Code memory
N area
Code
memory
area