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Month: June 2011

June 30, 2011 2 comments

Addressing 5 ROM Chips, Each of 4 KB Using 74LS138 Decoder

Last updated on June 13th, 2020 at 08:31 pm Addressing 5 ROM Chips, Each of 4 KB Using 74LS138 Decoder:

June 29, 2011

How can we interface the microprocessor with analog world? Explain with necessary figure.

Last updated on June 13th, 2020 at 08:31 pmInterfacing the Microprocessor with Analog World: As computer used digital binary values

June 29, 2011

How can you control LEDs using microprocessor via 82C55A PPI? Draw the interface diagram & write the necessary assembly codes.

Last updated on June 13th, 2020 at 08:31 pmControlling LEDs Using Microprocessor VIA 82C55A: Using the 82C55A, we can control

June 29, 2011

What are the purpose of using command byte A and command byte B on 82C55A? Explain with suitable example.

Last updated on June 13th, 2020 at 08:31 pm Purpose of Using Command Byte A: Command byte A is used

June 29, 2011

What will be the arrangement of ports on 82C55A PPI for the following bit format of command byte A, 10000010

Last updated on June 13th, 2020 at 08:31 pmThe given bit format is as follows, 7 6 5 4 3

June 29, 2011

What will be the bit format of command byte A in 82C55A PPI for these arrangement, (i) Mode 0, Port A as input, port B and port C as output. (ii) Mode 1, port A as output, port B as input.

Last updated on June 13th, 2020 at 08:31 pm(i) Required Bit Format of command byte A:          

June 29, 2011

Draw the command byte A and command byte B of 82C55A PPI.

Last updated on June 13th, 2020 at 08:31 pmCommand Byte A and Command Byte B:

June 29, 2011

Draw the pin-out diagram of 82C55A PPI. How many modes you can select on 82C55A PPI? Explain.

Last updated on June 13th, 2020 at 08:31 pmPin-Out Diagram of 82C55A: I/O Ports: It has three I/O ports, A,

June 29, 2011 15 comments

What is handshaking? Write a suitable example for handshaking with necessary assembly codes.

Last updated on June 13th, 2020 at 08:31 pm Handshaking:  Handshaking is a I/O control method to synchronize I/O devices

June 29, 2011 52 comments

Write the differences between Isolated I/O and Memory Mapped I/O.

Last updated on June 13th, 2020 at 08:31 pm Memory Mapped I/O and Isolated I/O are two methods of performing input-output

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