PIC18F85K22-I/PT Microchip Technology, PIC18F85K22-I/PT Datasheet - Page 400
PIC18F85K22-I/PT
Manufacturer Part Number
PIC18F85K22-I/PT
Description
IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-80
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F85K22-IPT.pdf
(550 pages)
Specifications of PIC18F85K22-I/PT
Controller Family/series
PIC18
No. Of I/o's
69
Eeprom Memory Size
1KB
Ram Memory Size
2KB
Cpu Speed
64MHz
No. Of Timers
8
Core Size
8 Bit
Program Memory Size
32KB
Core Processor
PIC
Speed
64MHz
Connectivity
EBI/EMI, I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
69
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 24x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F85K22-I/PT
Manufacturer:
Microchip Technology
Quantity:
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Part Number:
PIC18F85K22-I/PT
Manufacturer:
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PIC18F87K22 FAMILY
27.8
The CTMU, along with an internal diode, can be used
to measure the temperature. The ADC can be con-
nected to the internal diode and the CTMU module can
EXAMPLE 27-5:
DS39960D-page 400
// Initialize CTMU
CTMUICON = 0x03;
CTMUCONHbits.CTMUEN = 1;
CTMUCONLbits.EDG1STAT = 1;
// Initialize ADC
ADCON0 = 0xE5;
ADCON1 = 0x00;
ADCON2 = 0xBE;
ADCON0bits.GO = 1;
while(ADCON0bits.G0);
Temp = ADRES;
Note: The temperature diode is not calibrated or standardized; the user must calibrate the diode to their application.
Measuring Temperature
CTMU Module
ROUTINE FOR TEMPERATURE MEASUREMENT USING INTERNAL DIODE
with
// Enable ADC and connect to Internal diode
// Right Justified
// Start conversion
// Read ADC results (inversely proportional to temperature)
the
source the current to the diode. The ADC reading will
reflect the temperature. With the increase, the ADC
readings will go low. This can be used for low-cost
temperature measurement applications.
2009-2011 Microchip Technology Inc.
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