PIC16F84A-20I/P Microchip Technology, PIC16F84A-20I/P Datasheet - Page 394

• Manufacturer Part Number: PIC16F84A-20I/P
• Description: IC MCU FLASH 1KX14 EE 18DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F84A-20I/P

• Program Memory Type: FLASH
• Program Memory Size: 1.75KB (1K x 14)
• Package / Case: 18-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 13
• Eeprom Size: 64 x 8
• Ram Size: 68 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 68 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 13
• Number Of Timers: 1
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: - 40 C
• Data Rom Size: 64 B
• Height: 3.3 mm
• Length: 22.86 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4 V
• Width: 6.35 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: I3-DB16F84A - BOARD DAUGHTER ICEPIC3DVA16XP180 - ADAPTER DEVICE FOR MPLAB-ICEAC164010 - MODULE SKT PROMATEII DIP/SOIC
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
21.7
DS31021A-page 21-10
A/D Conversions
Example 21-2
inputs. The analog reference (V
conversion clock is F
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 conversion sample. That is, the
ADRES register will continue to contain the value of the last completed conversion (or the last
value written to the ADRES register). After the A/D conversion is aborted, a 2T
before the next acquisition is started. After this 2T
on the selected channel.
Example 21-2:
Figure 21-4: A/D Conversion T
;
;
;
;
Note:
Ensure that the required sampling time for the selected input
channel has elapsed. Then the conversion may be started.
BSF
CLRF
BSF
BCF
MOVLW
MOVWF
BCF
BSF
BSF
BSF
Set GO bit
T
:
:
:
AD
1 T
The GO/DONE bit should NOT be set in the same instruction that turns on the A/D,
due to the required acquition time requirement.
Holding capacitor is disconnected
from analog input
show how to perform an A/D conversion. The I/O pins are configured as analog
STATUS, RP0
ADCON1
PIE1,
STATUS, RP0
0xC1
ADCON0
PIR1,
INTCON, PEIE
INTCON, GIE
ADCON0, GO
AD
b7
Doing an A/D Conversion
2 T
RC
. The conversion is performed on the AN0 channel.
AD
b6
ADIE
ADIF
3 T
AD
b5
REF
AD
4 T
) is the device V
Cycles
; Select Bank1
; Configure A/D inputs
; Enable A/D interrupts
; Select Bank0
; 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 is cleared upon completion of the
;
b4
AD
5 T
A/D Conversion.
Holding capacitor is connected to analog input
b3
AD
6 T
AD
DD
wait, an acquisition is automatically started
. The A/D interrupt is enabled, and the A/D
b2
AD
Next Q4: ADRES is loaded
7 T
AD
b1
8 T
GO bit is cleared
ADIF bit is set
1997 Microchip Technology Inc.
AD
b0
9 T
AD
b0
AD
10
wait is required
T
AD
11