PIC16F73-I/SO Microchip Technology Inc., PIC16F73-I/SO Datasheet - Page 87

• Manufacturer Part Number: PIC16F73-I/SO
• Description: 28 PIN, 7 KB FLASH, 192 RAM, 22 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F73-I/SO

• A/d Inputs: 5-Channel, 8-Bit
• Cpu Speed: 5 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 22
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SOIC
• Programmable Memory: 7K Bytes
• Ram Size: 192 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

The following steps should be followed for doing an
A/D conversion:
1.
2.
3.
FIGURE 11-1:
 2002 Microchip Technology Inc.
Configure the A/D module:
• Configure analog pins, voltage reference,
• Select A/D conversion clock (ADCON0)
• Turn on A/D module (ADCON0)
Configure the A/D interrupt (if desired):
• Clear ADIF bit
• Set ADIE bit
• Set PEIE bit
• Set GIE bit
Select an A/D input channel (ADCON0).
Note 1: Not available on PIC16F73/76.
and digital I/O (ADCON1)
Converter
A/D
A/D BLOCK DIAGRAM
(Reference
Voltage)
V
REF
(Input Voltage)
PCFG2:PCFG0
V
IN
V
DD
000 or
010 or
100 or
11x
001 or
011 or
101
4.
5.
6.
7.
8.
Wait for at least an appropriate acquisition
period.
Start conversion:
• Set GO/DONE bit (ADCON0)
Wait for the A/D conversion to complete, by
either:
• Polling for the GO/DONE bit to be cleared
OR
• Waiting for the A/D interrupt
Read A/D result register (ADRES), and clear bit
ADIF if required.
For next conversion, go to step 3 or step 4, as
required.
(interrupts disabled)
CHS2:CHS0
111
110
101
100
011
010
001
000
PIC16F7X
RA1/AN1
RE2/AN7
RA2/AN2
RA0/AN0
RE1/AN6
RE0/AN5
RA5/AN4
RA3/AN3/V
DS30325B-page 85
(1)
(1)
(1)
REF