IC PIC MCU FLASH 16K 28-SSOP

PIC24F16KA102-I/SS

Manufacturer Part NumberPIC24F16KA102-I/SS
DescriptionIC PIC MCU FLASH 16K 28-SSOP
ManufacturerMicrochip Technology
SeriesPIC® XLP™ 24F
PIC24F16KA102-I/SS datasheets
 


Specifications of PIC24F16KA102-I/SS

Program Memory TypeFLASHProgram Memory Size16KB (5.5K x 24)
Package / Case28-SSOPCore ProcessorPIC
Core Size16-BitSpeed32MHz
ConnectivityI²C, IrDA, SPI, UART/USARTPeripheralsBrown-out Detect/Reset, POR, PWM, WDT
Number Of I /o24Eeprom Size512 x 8
Ram Size1.5K x 8Voltage - Supply (vcc/vdd)1.8 V ~ 3.6 V
Data ConvertersA/D 9x10bOscillator TypeInternal
Operating Temperature-40°C ~ 85°CProcessor SeriesPIC24F
CorePICData Bus Width16 bit
Data Ram Size1.5 KBInterface TypeI2C/IrDA/SPI/UART
Maximum Clock Frequency32 MHzNumber Of Programmable I/os24
Number Of Timers3Operating Supply Voltage1.8 V to 3.6 V
Maximum Operating Temperature+ 85 CMounting StyleSMD/SMT
3rd Party Development Tools52713-733, 52714-737, 53276-922, EWDSPICDevelopment Tools By SupplierPG164130, DV164035, DV244005, DV164005, DM240001
Minimum Operating Temperature- 40 COn-chip Adc9-ch x 10-bit
Lead Free Status / RoHS StatusLead free / RoHS CompliantFor Use WithMA240017 - MODULE PLUG-IN PIC24F16KA102 PIM
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Page 187/254

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25.0
CHARGE TIME
MEASUREMENT UNIT (CTMU)
This data sheet summarizes the features
Note:
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Charge Measurement Unit, refer to the
“PIC24F
Family
Reference
Section 11. “CTMU” (DS39724).
The Charge Time Measurement Unit (CTMU) is a
flexible analog module that provides charge measure-
ment, accurate differential time measurement between
pulse sources and asynchronous pulse generation. Its
key features include:
• Four edge input trigger sources
• Polarity control for each edge source
• Control of edge sequence
• Control of response to edges
• Time measurement resolution of one nanosecond
• Accurate current source suitable for capacitive
measurement
Together with other on-chip analog modules, the CTMU
can be used to precisely measure time, measure
capacitance, measure relative changes in capacitance,
or generate output pulses that are independent of the
system clock. The CTMU module is ideal for interfacing
with capacitive-based touch sensors.
The CTMU is controlled through two registers,
CTMUCON and CTMUICON. CTMUCON enables the
module, and controls edge source selection, edge
source polarity selection, and edge sequencing. The
CTMUICON register selects the current range of
current source and trims the current.
FIGURE 25-1:
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR
CAPACITANCE MEASUREMENT
C
APP
© 2009 Microchip Technology Inc.
PIC24F16KA102 FAMILY
25.1
Measuring Capacitance
The
CTMU
generating an output pulse with a width equal to the
time between edge events on two separate input
channels. The pulse edge events to both input
channels can be selected from four sources: two
internal peripheral modules (OC1 and Timer1) and two
external pins (CTEDG1 and CTEDG2). This pulse is
Manual”,
used with the module’s precision current source to
calculate capacitance according to the relationship:
For capacitance measurements, the A/D Converter
samples an external capacitor (C
input channels after the CTMU output’s pulse. A
precision resistor (R
calibration on a second A/D channel. After the pulse
ends, the converter determines the voltage on the
capacitor. The actual calculation of capacitance is
performed in software by the application.
Figure 25-1 displays the external connections used for
capacitance measurements, and how the CTMU and
A/D modules are related in this application. This
example also shows the edge events coming from
Timer1, but other configurations using external edge
sources are possible. A detailed discussion on
measuring capacitance and time with the CTMU
module is provided in the “PIC24F Family Reference
Manual”.
PIC24F Device
Timer1
CTMU
EDG1
Current Source
EDG2
Output Pulse
A/D Converter
ANx
AN
Y
R
PR
Preliminary
module
measures
capacitance
by
dV
C
=
I
------ -
dT
) on one of its
APP
) provides current source
PR
DS39927B-page 185