(b) Consider the following 8051 interfacing problem. Crystal frequency: 11.059MHz. The LED D8 will light up...

 

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(b) Consider the following 8051 interfacing problem. Crystal frequency: 11.059MHz. The LED D8 will light up with every key press as shown below. [1+1+1+1+1] HH C3 10uF 45V R2 10k U1 40 R1 680 19 VCC XTAL1 PO.0/ADO PO.1/AD1 PO.2/AD2 18 XTAL2 LED-YELLOW PO.3/AD3 12MHz PO.4/AD4 HoH PO.5/AD5 D8 PO.6/AD6 9 RST PO.7/AD7 CRYSTAL C1 C2 P2.0/A8 22pF 22pF P2.1/A9 P2.2/A10 R9 29 PSEN P2.3/A11 30 10k ALE P2.4/A12 31 EA P2.5/A13 P2.6/A14 P2.7/A15 P1.0 P3.0/RXD P1.1 P3.1/TXD P1.2 P3.2/INTO P1.3 P1.4 P1.5 P3.3/INT1 P3.4/TO P3.5/T1 P1.6 P1.7 P3.6/WR P3.7/RD GND AT89C51 20 i) iii) Initialize IE register for external interrupt at INTO Initialize TCON register for the appropriate type of interrupt Declare and define the interrupt service routine iv) Access and configure relevant pin as needed Call back action in the main function as needed (b) Consider the following 8051 interfacing problem. Crystal frequency: 11.059MHz. The LED D8 will light up with every key press as shown below. [1+1+1+1+1] HH C3 10uF 45V R2 10k U1 40 R1 680 19 VCC XTAL1 PO.0/ADO PO.1/AD1 PO.2/AD2 18 XTAL2 LED-YELLOW PO.3/AD3 12MHz PO.4/AD4 HoH PO.5/AD5 D8 PO.6/AD6 9 RST PO.7/AD7 CRYSTAL C1 C2 P2.0/A8 22pF 22pF P2.1/A9 P2.2/A10 R9 29 PSEN P2.3/A11 30 10k ALE P2.4/A12 31 EA P2.5/A13 P2.6/A14 P2.7/A15 P1.0 P3.0/RXD P1.1 P3.1/TXD P1.2 P3.2/INTO P1.3 P1.4 P1.5 P3.3/INT1 P3.4/TO P3.5/T1 P1.6 P1.7 P3.6/WR P3.7/RD GND AT89C51 20 i) iii) Initialize IE register for external interrupt at INTO Initialize TCON register for the appropriate type of interrupt Declare and define the interrupt service routine iv) Access and configure relevant pin as needed Call back action in the main function as needed