PIC18LF25K22-I/SP Microchip Technology, PIC18LF25K22-I/SP Datasheet - Page 322
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PIC18LF25K22-I/SP
Manufacturer Part Number
PIC18LF25K22-I/SP
Description
MCU 8BIT 32KB FLASH 3.6V 28SDIP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheets
1.PIC18F26J13-ISS.pdf
(496 pages)
2.PIC18F25K22T-ISS.pdf
(10 pages)
3.PIC18F25K22-ISP.pdf
(492 pages)
Specifications of PIC18LF25K22-I/SP
Program Memory Type
FLASH
Program Memory Size
32KB (16K x 16)
Package / Case
28-DIP (0.300", 7.62mm)
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 19x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
1536 B
Interface Type
I2C, SPI, EUSART
Maximum Clock Frequency
64 MHz
Number Of Programmable I/os
25
Number Of Timers
7
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164005
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 17 Channel
On-chip Dac
5 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
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PIC18(L)F2X/4XK22
EXAMPLE 19-2:
DS41412D-page 322
#include "p18cxxx.h"
#define COUNT 500
#define DELAY for(i=0;i<COUNT;i++)
#define RCAL .027
#define ADSCALE 1023
#define ADREF 3.3
int main(void)
{
//assume CTMU and A/D have been set up correctly
//see Example 25-1 for CTMU & A/D setup
setup();
CTMUCONHbits.CTMUEN = 1;
CTMUCONLbits.EDG1STAT = 0;
CTMUCONLbits.EDG2STAT = 0;
}
int i;
int j = 0;
unsigned int Vread = 0;
double VTot = 0;
float Vavg=0, Vcal=0, CTMUISrc = 0;
for(j=0;j<10;j++)
{
}
Vavg = (float)(VTot/10.000);
Vcal = (float)(Vavg/ADSCALE*ADREF);
CTMUISrc = Vcal/RCAL;
CTMUCONHbits.IDISSEN = 1;
DELAY;
CTMUCONHbits.IDISSEN = 0;
CTMUCONLbits.EDG1STAT = 1;
DELAY;
CTMUCONLbits.EDG1STAT = 0;
PIR1bits.ADIF = 0;
ADCON0bits.GO=1;
while(!PIR1bits.ADIF);
Vread = ADRES;
PIR1bits.ADIF = 0;
VTot += Vread;
CURRENT CALIBRATION ROUTINE
Preliminary
//@ 8MHz = 125uS.
//R value is 4200000 (4.2M)
//scaled so that result is in
//1/100th of uA
//for unsigned conversion 10 sig bits
//Vdd connected to A/D Vr+
//index for loop
//float values stored for calcs
//Enable the CTMU
// Set Edge status bits to zero
//drain charge on the circuit
//wait 125us
//end drain of circuit
//Begin charging the circuit
//using CTMU current source
//wait for 125us
//Stop charging circuit
//make sure A/D Int not set
//and begin A/D conv.
//Wait for A/D convert complete
//Get the value from the A/D
//Clear A/D Interrupt Flag
//Add the reading to the total
//Average of 10 readings
//CTMUISrc is in 1/100ths of uA
2010 Microchip Technology Inc.
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