MikroElektronika PIC Microcontrollers PIC16 Spécifications Page 124

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 266
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 123
mikroElektronika | Free Online Book | PIC Microcontrollers | Chapter 7: Analog Modules
Roughly speaking, voltage measurement in the converter is based on comparing input voltage with internal scale
which has 1024 marks (210=1024). The lowest scale mark stands for the Vref- voltage, whilst the highest mark
stands for the Vref+ voltage. Figure 7-3 below shows selectable referent voltages and their minimum and maximum
values as well.
Fig. 7-3 How to Use The A/D Converter
ADCON0 Register
Fig. 7-4 ADCON0 Register
ADCS1, ADCS0 - A/D Conversion Clock Select bits select clock frequency used for internal synchronization of A/D
converter. It also affects duration of conversion.
ADCS1 ADCS2 Clock
0 0 Fosc/2
0 1 Fosc/8
1 0 Fosc/32
1 1 RC *
Table 7-2 A/D Conversion Select Bits
* Clock is generated by internal oscillator which is built in converter.
CHS3-CHS0 - Analog Channel Select bits select a pin or an analog channel for conversion, i.e. voltage measurement:
http://www.mikroe.com/en/books/picmcubook/ch7/ (4 of 14)5/3/2009 11:34:24 AM
Vue de la page 123
1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 265 266

Commentaires sur ces manuels

Pas de commentaire