R0E417250MCU00 Datasheet, PDF (192/228 Pages) Renesas Technology Corp – E100 Emulator MCU Unit for H8SX/1700 Series

R0E417250MCU00 User’s Manual
5. Debugging Functions
The Violation of access protection dialog box will be displayed.
The rest of the procedure is the same as if you opened the Violation of access protection dialog box from the Hardware Break
dialog box.
5.14.4 Detecting Reading from a Non-initialized Area
Reading from a non-initialized area, i.e. cases of reading from a memory location to which nothing has been written, can be
detected as an error.
(1) Method of detection
Reading from a non-initialized area is detected by the RAM monitoring facility.
Allocate a RAM monitoring area to a given address range and enable error detection in that area.
Detection circuit
Neither reading
nor writing has
proceeded at the
location
->
-> Error
<Comparison>
Has access proceeded in the order
detected
“reading then writing”?
Figure 5.115 Outline of detection of reading from a non-initialized area
(2) Action taken when reading from a non-initialized area is detected
The following actions are selectable.
- Display a warning.
When the Read from uninitialized memory checkbox has been selected on the Exception Warning page of the Configuration
properties dialog box, you will see a warning in the Status window and in a status bar balloon when errors of this type occur.
Data is colored in the RAM Monitor window.
- Make the detection of reading from a non-initialized area a condition of a hardware breakpoint.
- Make the detection of reading from a non-initialized area a condition of a trace point.
REJ10J1831-0200 Rev.2.00 Jun.1, 2009
Page 192 of 228