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28). The diagram below shows the 8 bits of Port B of the 16F877A microcontroller connected to the 8bit D inputs of 4 X 8 bit D Flip Flops. The enable pins of each of these 8 bit Flip Flops is individually controlled by C1, C2, C3 and C4. This allows the programmer to write different 8bit data bytes to each of the 8bit D Flip Flops. which in turn drives each of the 4 X 8bit A/D converters. The A/D converters will produce an output voltage from 0 to 5 Volts which will drive each of the 4 X Voltage Controlled Oscillators (VCOs). The VCOs in turn will drive the transistors which toggle the LEDS and rates prescribed by the input data. The frequency of each VCO is given by the formula (Vin/5)x(20Hz). For a variation on Lab 7, you are required to produce a flowchart that will guide the C program for the event sequence below. You must also write the C program to load the appropriate data to toggle each LED at the required rate for each change of the input voltage: The dynamic range for an analog input to your PIC Microcontroller is declared to be 0V to 5V DC. From OV to 1V DC a Green LED will light and be toggled at a rate less than or equal to 4 Hz. For an input DC voltage greater than 1 V but less than or equal to 2 volts, a Yellow LED will light in addition to the Green LED. The yellow led will be toggled at a rate greater than 4Hz but less than or equal to 8Hz. For an input DC voltage greater than 2 V but less than or equal to 3 V, a Blue LED will light in addition to the Green and Yellow LEDs. The Blue let will be toggled at a rate that is greater than 8Hz but less than or equal to

28). The diagram below shows the 8 bits of Port B of the 16F877A microcontroller connected to the 8bit D inputs of 4 X 8 bit D Flip Flops. The enable pins of each of these 8 bit Flip Flops is individually controlled by C1, C2, C3 and C4. This allows the programmer to write different 8bit data bytes to each of the 8bit D Flip Flops. which in turn drives each of the 4 X 8bit A/D converters. The A/D converters will produce an output voltage from 0 to 5 Volts which will drive each of the 4 X Voltage Controlled Oscillators (VCOs). The VCOs in turn will drive the transistors which toggle the LEDS and rates prescribed by the input data. The frequency of each VCO is given by the formula (Vin/5)x(20Hz). For a variation on Lab 7, you are required to produce a flowchart that will guide the C program for the event sequence below. You must also write the C program to load the appropriate data to toggle each LED at the required rate for each change of the input voltage: The dynamic range for an analog input to your PIC Microcontroller is declared to be 0V to 5V DC. From OV to 1V DC a Green LED will light and be toggled at a rate less than or equal to 4 Hz. For an input DC voltage greater than 1 V but less than or equal to 2 volts, a Yellow LED will light in addition to the Green LED. The yellow led will be toggled at a rate greater than 4Hz but less than or equal to 8Hz. For an input DC voltage greater than 2 V but less than or equal to 3 V, a Blue LED will light in addition to the Green and Yellow LEDs. The Blue let will be toggled at a rate that is greater than 8Hz but less than or equal to

Introductory Circuit Analysis (13th Edition)
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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28). The diagram below shows the 8 bits of Port B of the 16F877A microcontroller connected to the 8bit D inputs of 4 X 8 bit D Flip Flops. The enable pins of each of these 8 bit Flip Flops is individually controlled by C1, C2, C3 and C4. This allows the programmer to write different 8bit data bytes to each of the 8bit D Flip Flops. which in turn drives each of the 4 X 8bit A/D converters. The A/D converters will produce an output voltage from 0 to 5 Volts which will drive each of the 4 X Voltage Controlled Oscillators (VVCOS). The VCOS in turn will drive the transistors which toggle the LEDS and rates prescribed by the input data. The frequency of each VCO is given by the formula (Vin/5)x(20HZ). .For a variation on Lab 7, you are required to produce a flowchart that will guide the C program for the event sequence below. You must also write the C program to load the appropriate data to toggle each LED at the required rate for each change of the input voltage: The dynamic range for an analog input to your PIC Microcontroller is declared to be OV to 5V DC. From 0V to 1V DC a Green LED will light and be toggled at a rate less than or equal to 4 Hz. For an input DC voltage greater than 1 V but less than or equal to 2 volts, a Yellow LED will light in addition to the Green LED. The yellow led will be toggled at a rate greater than 4Hz but less than or equal to 8Hz. For an input DC voltage greater than 2 V but less than or equal to 3 V, a Blue LED will light in addition to the Green and Yellow LEDS. The Blue let will be toggled at a rate that is greater than 8Hz but less than or equal to 12HZ. For an input DC voltage greater than 3 V a Red LED will light in addition to the others. The Red led will be toggled at a rate that is greater than 12HZ but less than or equal to 20HZ. Each LED will be toggled at a rate determined by the input voltage with the upper limit of each range determining the upper limit of the toggle rate for each LED. As such, the toggle frequency is determined by the formula (Vin/5V) X 20HZ and the range Max. dictates the maximum toggle rate of each LED. Remember, only the LEDS that are legitimately on will be made to toggle at the appropriate rate. 4 X8 bit D Flip Flops Red LED 4X8 bit A/D Converters D1 6 Bit Port B ww R5 Q1 330 Vco R1 C4 1K X1 Blue LED HBits of Port C D2 Q2 R6 330 16F877A VCO R2 1K X2 Yellow LED D3 R7 330 Q3 VCO R3 X3 1K Green LED D4 00 Q4 R8 330 VCO R4 X4 1K
Transcribed Image Text:28). The diagram below shows the 8 bits of Port B of the 16F877A microcontroller connected to the 8bit D inputs of 4 X 8 bit D Flip Flops. The enable pins of each of these 8 bit Flip Flops is individually controlled by C1, C2, C3 and C4. This allows the programmer to write different 8bit data bytes to each of the 8bit D Flip Flops. which in turn drives each of the 4 X 8bit A/D converters. The A/D converters will produce an output voltage from 0 to 5 Volts which will drive each of the 4 X Voltage Controlled Oscillators (VVCOS). The VCOS in turn will drive the transistors which toggle the LEDS and rates prescribed by the input data. The frequency of each VCO is given by the formula (Vin/5)x(20HZ). .For a variation on Lab 7, you are required to produce a flowchart that will guide the C program for the event sequence below. You must also write the C program to load the appropriate data to toggle each LED at the required rate for each change of the input voltage: The dynamic range for an analog input to your PIC Microcontroller is declared to be OV to 5V DC. From 0V to 1V DC a Green LED will light and be toggled at a rate less than or equal to 4 Hz. For an input DC voltage greater than 1 V but less than or equal to 2 volts, a Yellow LED will light in addition to the Green LED. The yellow led will be toggled at a rate greater than 4Hz but less than or equal to 8Hz. For an input DC voltage greater than 2 V but less than or equal to 3 V, a Blue LED will light in addition to the Green and Yellow LEDS. The Blue let will be toggled at a rate that is greater than 8Hz but less than or equal to 12HZ. For an input DC voltage greater than 3 V a Red LED will light in addition to the others. The Red led will be toggled at a rate that is greater than 12HZ but less than or equal to 20HZ. Each LED will be toggled at a rate determined by the input voltage with the upper limit of each range determining the upper limit of the toggle rate for each LED. As such, the toggle frequency is determined by the formula (Vin/5V) X 20HZ and the range Max. dictates the maximum toggle rate of each LED. Remember, only the LEDS that are legitimately on will be made to toggle at the appropriate rate. 4 X8 bit D Flip Flops Red LED 4X8 bit A/D Converters D1 6 Bit Port B ww R5 Q1 330 Vco R1 C4 1K X1 Blue LED HBits of Port C D2 Q2 R6 330 16F877A VCO R2 1K X2 Yellow LED D3 R7 330 Q3 VCO R3 X3 1K Green LED D4 00 Q4 R8 330 VCO R4 X4 1K
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