Expanding Code Memory - Oki Dr.63514 User Manual

Chapter 2. Functions

2.4.5 Expanding Code Memory

The EXPAND command temporarily expands the code memory to the full address space (64 KW) for
debugging a user application program that is too large for the user application program memory.
1FDFH
(0FDFH)
0000H
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n Note 1 n
Be sure to disable code memory expansion before starting final verification of user application
program operation.
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n Note 2 n
Changing the code memory expansion setting resets the evaluation chip.
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n Note 3 n
Test data areas exist at locations 0FE0H to 0FFFH or 1FE0H to 1FFFH, regardless of whether
the system is in normal mode or expanded mode. If expanded mode is used, the user must
design and code applications so that they do not execute locations in the test data area. A
forcible N area break will occur if a test data area location is executed.
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2-24
Normal mode
8K words
(4K words)
Figure 2-6 Code Memory Expansion
Expanded mode
0FFFFH
Expansion off
0000H
64K words