PIC16C76-10/JW Microchip Technology, PIC16C76-10/JW Datasheet - Page 122

• Manufacturer Part Number: PIC16C76-10/JW
• Description: 8-Bit CMOS Microcontrollers with A/D Converter
• Manufacturer: Microchip Technology

PIC16C7X
13.4
Example 13-2 shows how to perform an A/D conver-
sion. The RA pins are configured as analog inputs. The
analog reference (V
interrupt is enabled, and the A/D conversion clock is
F
(channel 0).
EXAMPLE 13-2: A/D CONVERSION
;
;
;
;
DS30390E-page 122
RC
Ensure that the required sampling time for the selected input channel has elapsed.
Then the conversion may be started.
. The conversion is performed on the RA0 pin
BSF
BCF
CLRF
BSF
BCF
MOVLW
MOVWF
BCF
BSF
BSF
BSF
:
:
A/D Conversions
Applicable Devices
72 73 73A 74 74A 76 77
STATUS, RP0
STATUS, RP1
ADCON1
PIE1,
STATUS, RP0
0xC1
ADCON0
PIR1,
INTCON, PEIE
INTCON, GIE
ADCON0, GO
REF
) is the device V
ADIE
ADIF
; Select Bank 1
; PIC16C76/77 only
; Configure A/D inputs
; Enable A/D interrupts
; Select Bank 0
; RC Clock, A/D is on, Channel 0 is selected
;
; Clear A/D interrupt flag bit
; Enable peripheral interrupts
; Enable all interrupts
; Start A/D Conversion
; The ADIF bit will be set and the GO/DONE bit
;
DD
is cleared upon completion of the A/D Conversion.
. The A/D
Clearing the GO/DONE bit during a conversion will
abort the current conversion. The ADRES register will
NOT be updated with the partially completed A/D con-
version sample. That is, the ADRES register will con-
tinue to contain the value of the last completed
conversion (or the last value written to the ADRES reg-
ister). After the A/D conversion is aborted, a 2T
is required before the next acquisition is started. After
this 2T
the selected channel.
Note:
AD
wait, an acquisition is automatically started on
The GO/DONE bit should NOT be set in
the same instruction that turns on the A/D.
1997 Microchip Technology Inc.
AD
wait