Draw the format of TCON register of 8051 and describe the function of each bit of it.

Draw the format of TCON register of 8051 and describe the function of each bit of it.
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1 Answer

Answer :

TCON: TIMER/COUNTER CONTROL REGISTER.BIT ADDRESSABLE 

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TF1 TCON. 7 Timer 1 overflows flag. Set by hardware when the Timer/Counter 1 Overflows. Cleared by hardware as processor vectors to the interrupt Service routine.

TR1 TCON. 6 Timer 1 run control bit. Set/cleared by software to turn Timer/Counter1 ON/OFF.

TF0 TCON. 5 Timer 0 overflow flag. Set by hardware when the Timer/Counter 0 Overflows. Cleared by hardware as processor vectors to the service routine.

TR0 TCON. 4 Timer 0 run control bit. Set/cleared by software to turn Timer/Counter 0 ON/OFF.

IE1 TCON. 3 External Interrupt 1 edge flag. Set by hardware when External Interrupt edge is detected. Cleared by hardware when interrupt is processed.

IT1 TCON. 2 Interrupt 1 type control bit. Set/cleared by software to specify falling edge/low level triggered External Interrupt.

IE0 TCON. 1 External Interrupt 0 edge flag. Set by hardware when External Interrupt edge detected. Cleared by hardware when interrupt is processed.

IT0 TCON. 0 Interrupt 0 type control bit. Set/cleared by software to Specify falling edge/low level triggered External Interrupt

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