27-04-2017, 12:18 AM
Sir,i want the vhdl code to interface adc0808 to lm35 and i m using sparten3e kit.
|
vhdl code for interfacing with adc0808 with lm35
|
Sir,i want the vhdl code to interface adc0808 to lm35 and i m using sparten3e kit.
28-04-2017, 12:33 PM
ADC0808 is one of the useful chips of National Semiconductor. See in the figure given to one side. In many embedded systems, microcontrollers need to take analog inputs. Most sensors and transducers such as temperature, humidity, pressure, are analog. For the interconnection of these sensors to microcontrollers it is necessary to convert the analog output of these sensors to digital so that the controller can read it. Some microcontrollers have built in analog-to-digital converter (ADC) so there is no need for external ADC. For drivers that do not have external ADC ADC is used.
One of the most commonly used ADCs is ADC0808. The ADC 0808 is a successive approximation type with 8 channels, that is, you can directly access 8 analog signals at one end. ADC0808 has an 8-bit data output as the ADC804. The 8 analog input channels are multiplexed and selected according to the table below the I / O pins using three A, B and C direction pins.
In ADC0808, Vref (+) and Vref (-) set the reference voltage. If Vref (-) = Gnd and Vref (+) = 5V, the step size is 5V / 256 = 19.53mV. Therefore, to obtain a step size of 10mV we need to establish Vref (+) = 2.56V and Vref (-) = Gnd. From the figure given below from ADC0808, note the ALE pins. We use the A, B and C directions to select IN0 - IN7 and activate ALE to block the address. SC is for startup conversion. SC is the same as the WR pin on other ADC chips. EOC is for the end of the conversion and OE is for the output enable (READ). The EOC and OE are the same as the INTR and RD pins respectively.
One of the most commonly used ADCs is ADC0808. The ADC 0808 is a successive approximation type with 8 channels, that is, you can directly access 8 analog signals at one end. ADC0808 has an 8-bit data output as the ADC804. The 8 analog input channels are multiplexed and selected according to the table below the I / O pins using three A, B and C direction pins.
In ADC0808, Vref (+) and Vref (-) set the reference voltage. If Vref (-) = Gnd and Vref (+) = 5V, the step size is 5V / 256 = 19.53mV. Therefore, to obtain a step size of 10mV we need to establish Vref (+) = 2.56V and Vref (-) = Gnd. From the figure given below from ADC0808, note the ALE pins. We use the A, B and C directions to select IN0 - IN7 and activate ALE to block the address. SC is for startup conversion. SC is the same as the WR pin on other ADC chips. EOC is for the end of the conversion and OE is for the output enable (READ). The EOC and OE are the same as the INTR and RD pins respectively.
It can be understood in the following video:
|
« Next Oldest | Next Newest »
|
Important Note..!
If you are not satisfied with above reply ,..PleaseASK HERE
So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
| Possibly Related Threads... | |||||
| Thread | Author | Replies | Views | Last Post | |
| Lm35 Temperature Sensor using Microprocessor 8086 | 0 | 854 |
23-06-2021, 02:59 PM Last Post: |
||
| 8085 or 8086 vhdl code pdf | 0 | 625 |
23-05-2018, 08:59 PM Last Post: Guest |
||
| smoke sensor interfacing with lpc2148 | 0 | 581 |
19-03-2018, 11:10 AM Last Post: Guest |
||
| how to interface lm35 with fpga code in verilog | 0 | 558 |
04-03-2018, 09:56 PM Last Post: Guest |
||
| vhdl verilog codes for digital watermarking | 0 | 593 |
04-03-2018, 07:34 PM Last Post: Guest |
||
| c code for interfacing r305 with at89s52 microcontrolller | 0 | 478 |
22-02-2018, 11:45 AM Last Post: Guest |
||
| java code code for railway anti collision system | 1 | 714 |
13-02-2018, 11:13 AM Last Post: dhanabhagya |
||
| difference between adc0808 and adc0804 | 1 | 768 |
31-01-2018, 03:16 PM Last Post: dhanabhagya |
||
| c code for interfacing r305 with at89s52 microcontrolller | 1 | 497 |
27-01-2018, 02:14 PM Last Post: dhanabhagya |
||
| microprocessor 8086 programming interfacing nagoor kani pdf | 1 | 646 |
23-01-2018, 10:03 AM Last Post: dhanabhagya |
||