B. E./B. Tech. Degree examination, april/may 2011 Sixth Semester


Name the special functions registers available in 8051



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8. Name the special functions registers available in 8051.
Accumulator B Register Program status Word. Stack pointer. Data pointer Port 0 Port 1 Port 2 Port 3 Interrupt priority control register. Interrupt enable control register.
9. Explain the register IE format of 8051.
EA ET ES ET EX ET EX EA- Enable all control bit. ET- Timer 2 interrupt enable bit. ES- Enable serial port control bit. ET- Enable Timer control bit.
EX1-Enable external interrupt control bit.
ET0-Enable Timer control bit.
EX0-Enable external interrupt control bit.

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