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INTEDG датащи(PDF) 327 Page - Microchip Technology

номер детали INTEDG
подробное описание детали  64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology
PDF  478 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

INTEDG датащи(HTML) 327 Page - Microchip Technology

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 2010-2012 Microchip Technology Inc.
DS41414D-page 327
PIC16(L)F1946/47
26.0 CAPACITIVE SENSING (CPS)
MODULE
The Capacitive Sensing (CPS) module allows for an
interaction with an end user without a mechanical
interface. In a typical application, the CPS module is
attached to a pad on a Printed Circuit Board (PCB),
which is electrically isolated from the end user. When the
end user places their finger over the PCB pad, a
capacitive load is added, causing a frequency shift in the
CPS module. The CPS module requires software and at
least one timer resource to determine the change in
frequency. Key features of this module include:
• Analog MUX for monitoring multiple inputs
• Capacitive sensing oscillator
• Multiple power modes
• Multiple current ranges
• Multiple voltage reference modes
• Software control
• Operation during Sleep
FIGURE 26-1:
CAPACITIVE SENSING BLOCK DIAGRAM
Note 1:
If CPSON = 0, disabling capacitive sensing, no channel is selected.
TMR0CS
CPS0
CPS1
CPS2
CPS3
CPS4
CPS5
CPS6
CPS7
CPS8
CPS9
CPS10
CPSCH<3:0>
Capacitive
Sensing
Oscillator
CPSOSC
CPSON
CPSRNG<1:0>
TMR0
0
1
Set
TMR0IF
Overflow
T0XCS
0
1
T0CKI
CPS11
CPS12
CPS13
CPS14
CPS15
CPSCLK
FOSC/4
Timer0 Module
CPSON(1)
TMR1CS<1:0>
T1OSC/
T1CKI
TMR1H:TMR1L
EN
T1GSEL<1:0>
Timer1 Gate
Control Logic
T1G
FOSC
FOSC/4
Timer1 Module
sync_C1OUT
sync_C2OUT
0
1
Int.
Ref.
FVR
DAC
Ref+
Ref-
CPSRM
0
1
CPS16
CPSOUT
Output



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