PIC18F25K20-I/SO Microchip Technology, PIC18F25K20-I/SO Datasheet - Page 268

• Manufacturer Part Number: PIC18F25K20-I/SO
• Description: IC PIC MCU FLASH 16KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F25K20-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 32KB (16K x 16)
• Package / Case: 28-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 24
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: CCP/ECCP/EUSART/I2C/MSSP/SPI
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 25
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 11-ch x 10-bit
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 64 MHz
• Operating Supply Voltage: 2.5|3.3 V
• A/d Bit Size: 10 bit
• A/d Channels Available: 11
• Height: 2.31 mm
• Length: 17.87 mm
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.8 V
• Width: 7.49 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164112 - VOLTAGE LIMITER MPLAB ICD2 VPP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F2XK20/4XK20
19.2.9
This is an example procedure for using the ADC to
perform an Analog-to-Digital conversion:
1.
2.
3.
4.
5.
6.
7.
8.
DS41303D-page 266
Note 1: The global interrupt can be disabled if the
Configure Port:
• Disable pin output driver (See TRIS register)
• Configure pin as analog
Configure the ADC module:
• Select ADC conversion clock
• Configure voltage reference
• Select ADC input channel
• Select result format
• Select acquisition delay
• Turn on ADC module
Configure ADC interrupt (optional):
• Clear ADC interrupt flag
• Enable ADC interrupt
• Enable peripheral interrupt
• Enable global interrupt
Wait the required acquisition time
Start conversion by setting the GO/DONE bit.
Wait for ADC conversion to complete by one of
the following:
• Polling the GO/DONE bit
• Waiting for the ADC interrupt (interrupts
Read ADC Result
Clear the ADC interrupt flag (required if interrupt
is enabled).
enabled)
2: Software delay required if ACQT bits are
A/D CONVERSION PROCEDURE
user is attempting to wake-up from Sleep
and resume in-line code execution.
set to zero delay. See Section 19.3 “A/D
Acquisition Requirements”.
(1)
(2)
.
Preliminary
EXAMPLE 19-1:
;This code block configures the ADC
;for polling, Vdd and Vss as reference, Frc
clock and AN0 input.
;
;Conversion start & polling for completion
; are included.
;
MOVLW
MOVWF
MOVLW
MOVWF
BSF
BSF
MOVLW
MOVWF
BSF
ADCPoll:
BTFSC
BRA
; Result is complete - store 2 MSbits in
; RESULTHI and 8 LSbits in RESULTLO
MOVFF
MOVFF
B’10101111’ ;right justify, Frc,
ADCON2
B’00000000’ ;ADC ref = Vdd,Vss
ADCON1
TRISA,0
ANSEL,0
B’00000001’ ;AN0, ADC on
ADCON0
ADCON0,GO
ADCON0,GO
ADCPoll
ADRESH,RESULTHI
ADRESL,RESULTLO
A/D CONVERSION
© 2008 Microchip Technology Inc.
; & 12 TAD ACQ time
;
;Set RA0 to input
;Set RA0 to analog
;
;Start conversion
;Is conversion done?
;No, test again