PIC16LF727-E/P Microchip Technology, PIC16LF727-E/P Datasheet - Page 131
![IC PIC MCU FLASH 8KX14 40-DIP](/photos/6/61/66192/150-40-dip_sml.jpg)
PIC16LF727-E/P
Manufacturer Part Number
PIC16LF727-E/P
Description
IC PIC MCU FLASH 8KX14 40-DIP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 16Fr
Specifications of PIC16LF727-E/P
Program Memory Type
FLASH
Program Memory Size
14KB (8K x 14)
Package / Case
40-DIP (0.600", 15.24mm)
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
36
Ram Size
368 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 14x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Processor Series
PIC16LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
368 B
Interface Type
I2C/SCI/SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
36
Number Of Timers
3
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120
Minimum Operating Temperature
- 40 C
On-chip Adc
14-ch x 8-bit
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:
PIC16LF727-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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14.5
The software portion of the capacitive sensing module
is required to determine the change in frequency of the
capacitive sensing oscillator. This is accomplished by
the following:
• Setting a fixed time base to acquire counts on
• Establishing the nominal frequency for the
• Establishing the reduced frequency for the
• Set the frequency threshold
14.5.1
To determine the nominal frequency of the capacitive
sensing oscillator:
• Remove any extra capacitive load on the selected
• At the start of the fixed time base, clear the timer
• At the end of the fixed time base save the value in
The value of the timer resource is the number of
oscillations of the capacitive sensing oscillator for the
given time base. The frequency of the capacitive
sensing oscillator is equal to the number of counts on
in the timer divided by the period of the fixed time base.
14.5.2
The extra capacitive load will cause the frequency of the
capacitive sensing oscillator to decrease. To determine
the reduced frequency of the capacitive sensing
oscillator:
• Add a typical capacitive load on the selected
• Use the same fixed time base as the nominal
• At the start of the fixed time base, clear the timer
• At the end of the fixed time base save the value in
The value of the timer resource is the number of oscil-
lations of the capacitive sensing oscillator with an addi-
tional capacitive load. The frequency of the capacitive
sensing oscillator is equal to the number of counts on
in the timer divided by the period of the fixed time base.
This frequency should be less than the value obtained
during the nominal frequency measurement.
© 2009 Microchip Technology Inc.
Timer0 or Timer1
capacitive sensing oscillator
capacitive sensing oscillator due to an additional
capacitive load
CPSx pin
resource
the timer resource
CPSx pin
frequency measurement
resource
the timer resource
Software Control
NOMINAL FREQUENCY
(NO CAPACITIVE LOAD)
REDUCED FREQUENCY
(ADDITIONAL CAPACITIVE LOAD)
PIC16F72X/PIC16LF72X
14.5.3
The frequency threshold should be placed midway
between the value of nominal frequency and the
reduced frequency of the capacitive sensing oscillator.
Refer to Application Note AN1103, “Software Handling
for Capacitive Sensing” (DS01103) for more detailed
information the software required for capacitive
sensing module.
Note:
• AN1101, “Introduction to Capacitive
• AN1102, “Layout and Physical Design
FREQUENCY THRESHOLD
For more information on general Capacitive
Sensing refer to Application Notes:
Sensing” (DS01101)
Guidelines for Capacitive Sensing”
(DS01102)
41341E-page 131
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