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C51: ARE RAM BIT-ADDRESSABLE REGISTERS SUPPORTED?
Information in this article applies to:
- C51 All Versions
QUESTION
Are RAM bit-addressable registers supported in C51?
ANSWER
The 8051's SFR area from 0x80-0xFF and the bit-addressable range from 0x20-0x2F are both supported. Bit-addressable SFRs may be accessed both in C and assembly.
The C type sbit is designed specifically to assign a name to bits within SFRs.
The C type bit is designed to declare a bit variable in the bit-addressable area from 0x20 to 0x2F.
Last Reviewed: Monday, May 17, 2004
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