2
Analog to Digital Conversion
zResolution
zAnalog Input Channels
zConversion time
zVref
zDigital data Output
zStart and End of conversion Signals
docsity.com
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Analog to Digital Conversion-Embedded System Control-Lecture Slides, Slides of Embedded Control Systems
This lecture was delivered by Mr. Rohit Kohli at National Institute of Industrial Engineering for Embedded System Control course. It includes: Muscular, Dysrophies, Papillae, G-protein, Genetic, Myoblasts, Myotubes, Eccentrically, Milestones, Nutrition
Typology: Slides
2011/2012
Uploaded on 07/26/2012
unknown user 🇮🇳
1 / 5
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download Analog to Digital Conversion-Embedded System Control-Lecture Slides and more Slides Embedded Control Systems in PDF only on Docsity!
Analog to Digital Conversion z
Resolution
z
Analog Input Channels
z
Conversion time
z
Vref
z
Digital data Output
z
Start and End of conversion Signals
docsity.com
Registers for Serial Communication z
A/D Result High Register (ADRESH)
z
A/D Result Low Register (ADRESL)
z
A/D Control Register 0 (ADCON0)
z
A/D Control Register 1 (ADCON1)
z
A/D Control Register 2 (ADCON2)
ADCON0 RegisterADCON1 Register 7
—
—
CHS
CHS
CHS
CHS
GO/DONE
ADON
—
—
VCFG
VCFG
PCFG
PCFG
PCFG
PCFG0docsity.com
Steps to configure ADC 1. Configure the A/D module:
z
Configure analog pins, voltage reference and digital I/O (ADCON1)
z
Select A/D input channel (ADCON0)
z
Select A/D conversion clock (ADCON2)
z
Select A/D acquisition time (ADCON2)
z
Turn on A/D module (ADCON0)
- Configure A/D interrupt (if desired):
z
Clear ADIF bit
z
Set ADIE bit
z
Set GIE bit
- Wait the required acquisition time (if required). 4. Start conversion:
z
Set GO/DONE bit (ADCON0 register)
- Wait for A/D conversion to complete, by either:
z
Polling for the GO/DONE bit to be cleared OR
z
Waiting for the A/D interrupt
- Read A/D Result registers (ADRESH:ADRESL); clear bit, ADIF, if required. 7. For next conversion, go to step 1 or step 2, as required. The A/D conversion
time per bit is defined as TAD. A minimum wait of 2 TAD is required beforethe next acquisition starts.
docsity.com
SUMMARY
docsity.com