3 Given the following AHDL code, explain how this code "debounces" a pushbutton. If a key is pressed, input key_pressed is high; if no key is pressed, key_pressed is low. What happens when the key is not pressed? What happens when the key is pressed? Refer to parts of the code and be specific in your answer. SUBDESIGN debounce { clk, key_pressed: INPUT; strobe: OUTPUT; count [6..0]: DFF; count [].clk = clk; count [].clrn = key_pressed; IF (count [].q <= 126) & key_pressed THEN count [].d = count[].q+1; IF count [].q == 126 THEN strobe = VCC; ELSE strobe = GND; END IF; } VARIABLE BEGIN END;
3 Given the following AHDL code, explain how this code "debounces" a pushbutton. If a key is pressed, input key_pressed is high; if no key is pressed, key_pressed is low. What happens when the key is not pressed? What happens when the key is pressed? Refer to parts of the code and be specific in your answer. SUBDESIGN debounce { clk, key_pressed: INPUT; strobe: OUTPUT; count [6..0]: DFF; count [].clk = clk; count [].clrn = key_pressed; IF (count [].q <= 126) & key_pressed THEN count [].d = count[].q+1; IF count [].q == 126 THEN strobe = VCC; ELSE strobe = GND; END IF; } VARIABLE BEGIN END;
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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![3
Given the following AHDL code, explain how this code "debounces"
a pushbutton. If a key is pressed, input key_pressed is high; if no
key is pressed, key_pressed is low. What happens when the key is
not pressed? What happens when the key is pressed? Refer to parts
of the code and be specific in your answer.
SUBDESIGN debounce
{
clk, key_pressed: INPUT;
strobe: OUTPUT;
count [6..0]: DFF;
count [].clk = clk;
count [].clrn = key_pressed;
IF (count [].q <= 126) & key_pressed THEN
count [].d = count [].q+1;
IF count [].q
==
126 THEN
strobe VCC;
=
ELSE
strobe = GND;
END IF;
}
VARIABLE
BEGIN
END;](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe1b9a34d-1de4-412e-a453-24fa1d19e32b%2F66b8fd06-29d2-4b03-9404-d76ecb065d58%2Flvw6o9hbh_processed.png&w=3840&q=75)
Transcribed Image Text:3
Given the following AHDL code, explain how this code "debounces"
a pushbutton. If a key is pressed, input key_pressed is high; if no
key is pressed, key_pressed is low. What happens when the key is
not pressed? What happens when the key is pressed? Refer to parts
of the code and be specific in your answer.
SUBDESIGN debounce
{
clk, key_pressed: INPUT;
strobe: OUTPUT;
count [6..0]: DFF;
count [].clk = clk;
count [].clrn = key_pressed;
IF (count [].q <= 126) & key_pressed THEN
count [].d = count [].q+1;
IF count [].q
==
126 THEN
strobe VCC;
=
ELSE
strobe = GND;
END IF;
}
VARIABLE
BEGIN
END;
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