8051 Special Function Registers

8051 SFR

• 0x80 – 0xFF: Special Function Registers (SFR)
• SFR’s are to control specific functionality of 8051
• SFR allows to configure and control peripherals
• SFRs are accessed as if they were normal Internal RAM
• Each SFR has an address and a name
• There are 21 SFRs in a standard 8051
• SFRs are grouped in to three categories
• IO port SFR: P0, P1, P2, P3
• Control SFR: TCON, TMOD, SCON, IE, IP, PSW
• Auxiliary SFR:  SP, DPL, DPH, TL0, TL1, TH0, TH1, SBUF, ACC, B

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Related topics:
8051 Program Memory   |   8051 Data Memory   |   8051 Register Bank   |   8051 Bit Memory   |   8051 Memory Map

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List of topics: 8051

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