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Technical Support
On-Line Manuals
LX51 User's Guide
LX51 Introduction
Linking Programs
Locating Program Objects
Classic 8051 Devices
Standard Application Example
Code Banking Example
Extended 8051 Devices
Standard Application Example
Code Banking Example
Using Wildcards
Special ROM Handling
Class Information
Segment Information
Using a Target Monitor
Data Overlaying
Code Banking
Real-Time Programs
Error Messages
Code Banking Example
A code banking application with the following memory map:
| Memory Area |
Address Range |
Usage |
|---|---|---|
| On-Chip RAM |
I:0x00–I:0xFF | Registers, bits, variables, stack, ... |
| External RAM |
X:0x0000–X:0x7FFF | Variables too large for on-chip RAM. |
| ROM | C:0x0000–C:0x7FFF (common area) |
Program code and constants. |
| CODE ROM | C:0x000000–C:0x03FFFF (code banks) |
Program code and constants. |
requires the following linker command line:
LX51 BANK0 {A.OBJ},
BANK1 {B.OBJ},
BANK2 {C.OBJ},
BANK3 {D.OBJ}
BANKAREA (0x8000-0xFFFF)
CLASSES (
XDATA (X:0x0000-X:0x7FFF),
HCONST (C:0x000000-C:0x03FFFF)
CODE (C:0x0000-C:0xFFFF)
)
There are several Application Notes available that show how to create programs for extended 8051 devices.
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