Chapter 1.1, Problem 5QC

Sheet4 There is a buzzer connected to the 0 pin of PortB. Write a program that turns the buzzer on 3 different tones with 25% pulse time with the button at bit 0 of Port A, 50% pulse time with the button at bit 1 of Port A, and 75% pulse time with the button at bit 2 of Port A.

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How a keyboard matrix is formed in keyboard interface using 8279?

Pls answer quickly I’ll assure you to give a thumbs up! - explain what will happen if a process A locks the associated mutex before calling pthread cond wait (), but another process B does not lock the associated mutex before call pthread_cond_signal().

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Write a Verilog program for a 3-to8 decoder based on the Truth Table 1. You are not allowed to use 2-to-4 decoder to build your 3-to-8 decoder. 25 26 27 0000 0000 En A2 A1 A0 20 z1 22 23 24 000 0| 1| 1| 0 0 1 1 1 1 1 000 00|0 1 1 1 110 1 1 1 1 1 1 1 1 1 1. Truth Table 1 ololoH HOO xlolo lolol- A

171. When Amplitude Shift Keying (ASK) is implemented using only two levels then it is called a. Half Duplex ASK b. Multilevel ASK c. Binary ASK d. Duplex ASK

QUESTION 5 If part A = 1101B and the "5" key is pressed, port B will read [Be careful to check the MSB first.] Port A (output) 3. DO 4. D1 A B D2 D3 Vcc D3 D2 D1 DO Port B (input) 0100B 1011B 1110B 0001B O 1101B 1111B 0000B

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