Microchip Technology IC PIC MCU PIC16F1937-I/PT TQFP-44 MCP PIC16F1937-I/PT Hoja De Datos
Los códigos de productos
PIC16F1937-I/PT
2008-2011 Microchip Technology Inc.
DS41364E-page 319
PIC16(L)F1934/6/7
26.0
CAPACITIVE SENSING (CPS)
MODULE
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 ranges
• Multiple timer resources
• Software control
• Operation during Sleep
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 ranges
• Multiple timer resources
• Software control
• Operation during Sleep
FIGURE 26-1:
CAPACITIVE SENSING BLOCK DIAGRAM
TMR0CS
CPS0
CPS1
CPS2
CPS3
CPS4
CPS5
CPS6
CPS7
CPS1
CPS2
CPS3
CPS4
CPS5
CPS6
CPS7
CPS8
(1)
CPS9
(1)
CPS10
(1)
CPSCH<3:0>
(2)
Capacitive
Sensing
Oscillator
CPSOSC
CPSOSC
CPSON
CPSRNG<1:0>
TMR0
0
1
Set
TMR0IF
Overflow
T0XCS
0
1
T0CKI
CPSOUT
CPS11
(1)
CPS12
(1)
CPS13
(1)
CPS14
(1)
CPS15
(1)
CPSCLK
Note 1:
Reference CPSCON1 register (
) for channels implemented on each device.
2:
CPSCH3 is not implemented on PIC16(L)F1936.
3:
If CPSON = 0, disabling capacitive sensing, no channel is selected.
F
OSC
/4
Timer0 Module
CPSON
(3)
T1CS<1:0>
T1OSC/
T1CKI
TMR1H:TMR1L
EN
T1GSEL<1:0>
Timer1 Gate
Control Logic
T1G
F
OSC
F
OSC
/4
Timer1 Module
SYNCC1OUT
SYNCC2OUT
SYNCC2OUT