C51: Support for Philips P89C51RC & P89C51RC2

Information in this article applies to:

• C51 Version 6.00 and Later

QUESTION

Does the Keil compiler support the Philips P89C51RC and P89C51RC2 devices?

ANSWER

Yes. These devices are 8051 compatible and have an 8051 instruction set. So, they are supported by the compiler.

Most chip-specific features are implemented through the addition of special function registers. C header files are included for the most commonly used processor derivatives. The header files define the SFRs for that derivative. I t is easy to create your own header files for new chips. In most, if not all, cases, using the extended features of these chips is as simple as adding a single line of code to this header file. For example, the following line of code declares the SFR for the 8051's port 1.

sfr P1 = 0x90;

Adding register definitions is almost identical in assembly language.

SEE ALSO

• C51: Support of Non-standard Chip Features
• C51: Creating CPU Header Files
• µVision: Adding Custom Parts to the Device Database

MORE INFORMATION

• µVision: ADDING HEADER FILES TO A PROJECT
• A51: Obtaining an Include File for a Particular Device

Last Reviewed: Thursday, February 25, 2021