A51 – Assembler Kit The A51 Assembler Kit for the microcontroller family enables you to write assembler programs for practically any derivatives. This Assembler User’s Guide provides an overview of the Keil A51 and AX51 Assemblers. It contains the following chapters. Introduction provides a brief. The CA51 Compiler Kit for the microcontroller family supports all derivatives including classic devices and IP cores from companies like Analog.

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Since the does not directly support more than 64 Kbytes of code address space, there must be external hardware that swaps code banks. These directives assrmbler useful when using indirectly called functions or when disabling overlaying for debugging. Revision History May The linker resolves external and public references and assigns absolute assemble fixed addresses to relocatable program segments.

It may also contain frequently used code. The common area in a bank switching program is an area of memory that can be 3 accessed at all times from all banks. Initial revision in CHM format.

Map File Following is an example listing file generated by BL You can dramatically improve system performance by grouping interdependent functions in the same bank. The standard macro syntax is compatible with that used in many other assemblers.

This greatly reduces the overall memory requirement of most applications. List of all our Products. Customers who purchased this product also bought:. BL51 displays the invocation line and the memory model.


Warning messages and error messages are listed at the end of the MAP file. When your C program calls a function located in a different bank, it switches the bank, jumps to the desired function, restores the previous bank when the function completesand returns execution to the calling routine. The A51 Assembler is a macro assembler for the microcontroller family. It translates symbolic assembler language mnemonics into executable machine code. Control Statements permit you to define symbol values, reserve and initialize storage, and control the placement of your code.

A51 Macro Assembler

Tell someone you know about this product. It allows you to define and use assemblrr in your assembly programs. The macro facility speeds development and conserves maintenance time since common sequences need only be developed once.

Macro Processor discusses how to use the macro expansion capabilities of the assembler.

It also allows you to generate different applications from one assembly source file. The A51 Assembler is a macro assembler for the family of microcontrollers.

D. Assembler Differences

By carefully grouping a15 in the different banks, you can create very large, efficient applications. By continuing to use our site, you consent to our cookies. Error Messages lists all error and warning messages that are generated by the assembler. Writing Assembly Programs describes the components of an assembly program and some aspects of writing assembly programs.

The A51 Assembler generates complete line number, symbol, and type. The memory map 3 contains the usage of the physical memory. Enter keywords to find the product you are looking for in the Quick Find field above or use Advanced Search.

A51 Assembler Kit

The linker automatically selects the appropriate run-time library and links only those library modules that are required. The listing contains a source line number and the object code generated by each source line. The Appendix provides numerous details about the assembler including instruction set, limitations, reserved words, and predefined symbols. The linker resolves external and public references and assigns absolute addresses to relocatable programs segments.


The A51 Assembler allows you to define each instruction in an program and is used where utmost speed, small code size, and exact hardware control is essential. The A51 assembler translates assembler source files into a relocatable object modules. It contains the following chapters.

It translates symbolic assembly language mnemonics into relocatable object code where the utmost speed, small code size, and hardware control are critical. Functions that are frequently invoked from multiple banks should be located in the common area. Conditional assembly of sections of code can help you achieve the most compact code possible. Assembling Programs specifies how to run the assembler and generate object files. This process is known as bank switching.

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The hardware that does this must be controlled assenbler software running on the The common area cannot be physically. Listing File Following is an example listing file generated by the assembler.