PIC18LF44J11-I/PT Microchip Technology, PIC18LF44J11-I/PT Datasheet - Page 379
![IC PIC MCU FLASH 16K 2V 44-TQFP](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC18LF44J11-I/PT
Manufacturer Part Number
PIC18LF44J11-I/PT
Description
IC PIC MCU FLASH 16K 2V 44-TQFP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheets
1.MA180023.pdf
(528 pages)
2.PIC18LF24J10-ISS.pdf
(32 pages)
3.PIC18F24J11-ISS.pdf
(14 pages)
4.PIC18F26J11-ISO.pdf
(28 pages)
Specifications of PIC18LF44J11-I/PT
Program Memory Type
FLASH
Program Memory Size
16KB (8K x 16)
Package / Case
44-TQFP, 44-VQFP
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
34
Ram Size
3.8K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 13x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3776 B
Interface Type
EUSART, I2C, SPI
Maximum Clock Frequency
31 KHz
Number Of Programmable I/os
22
Number Of Timers
5
Operating Supply Voltage
2 V to 3.6 V
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, DM183022, DM183032, DV164136, MA180023
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 13 Channel
A/d Bit Size
10 bit
A/d Channels Available
13
Height
1 mm
Length
10 mm
Supply Voltage (max)
2.75 V, 3.6 V
Supply Voltage (min)
2 V
Width
10 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18LF44J11-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- MA180023 PDF datasheet
- PIC18LF24J10-ISS PDF datasheet #2
- PIC18F24J11-ISS PDF datasheet #3
- PIC18F26J11-ISO PDF datasheet #4
- Current page: 379 of 528
- Download datasheet (8Mb)
24.3.2
There is a small amount of capacitance from the inter-
nal A/D Converter sample capacitor as well as stray
capacitance from the circuit board traces and pads that
affect the precision of capacitance measurements. A
measurement of the stray capacitance can be taken by
making sure the desired capacitance to be measured
has been removed. The measurement is then
performed using the following steps:
1.
2.
3.
4.
5.
6.
where I is known from the current source measurement
step, t is a fixed delay and V is measured by performing
an A/D conversion.
This measured value is then stored and used for
calculations of time measurement or subtracted for
capacitance measurement. For calibration, it is
expected that the capacitance of C
approximately known. C
© 2009 Microchip Technology Inc.
Initialize the A/D Converter and the CTMU.
Set EDG1STAT (= 1).
Wait for a fixed delay of time t.
Clear EDG1STAT.
Perform an A/D conversion.
Calculate the stray and A/D sample capacitances:
C
OFFSET
CAPACITANCE CALIBRATION
=
C
STRAY
AD
is approximately 4 pF.
+
C
AD
=
(
I t ⋅
STRAY
) V ⁄
+ C
AD
is
PIC18F46J11 FAMILY
An iterative process may need to be used to adjust the
time, t, that the circuit is charged to obtain a reasonable
voltage reading from the A/D Converter. The value of t
may be determined by setting C
value, then solving for t. For example, if C
theoretically calculated to be 11 pF, and V is expected
to be 70% of V
or 63 μs.
See Example 24-3 for a typical routine for CTMU
capacitance calibration.
(4 pF + 11 pF) • 2.31V/0.55 μA
DD
, or 2.31V, then t would be:
OFFSET
DS39932C-page 379
to a theoretical
STRAY
is
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