PIC16F1847-I/SO Microchip Technology, PIC16F1847-I/SO Datasheet - Page 317

• Manufacturer Part Number: PIC16F1847-I/SO
• Description: 14 KB Flash, 1K Bytes RAM, 32 MHz Int. Osc, 16 I/0, Enhanced Mid Range Core 18 S
• Manufacturer: Microchip Technology

Specifications of PIC16F1847-I/SO

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

27.0
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
• High power range with variable voltage references
• Multiple timer resources
• Software control
• Operation during Sleep
FIGURE 27-1:
 2011 Microchip Technology Inc.
Note 1:
CPS10
CPS11
CPS0
CPS1
CPS2
CPS3
CPS4
CPS5
CPS6
CPS7
CPS8
CPS9
CAPACITIVE SENSING
MODULE
If CPSON = 0, disabling capacitive sensing, no channel is selected.
CPSON
CAPACITIVE SENSING BLOCK DIAGRAM
CPSCH<3:0>
Ref-
(1)
0
1
Capacitive
Oscillator
CPSOSC
CPSRM
Sensing
DAC
Ref+
CPSRNG<1:0>
CPSON
0
1
FVR
Ref.
Int.
T0CKI
Preliminary
T0XCS
CPSOUT
CPSCLK
0
1
F
SYNCC1OUT
SYNCC2OUT
OSC
T1GSEL<1:0>
T1CS<1:0>
/4
T1OSC/
F
F
T1CKI
T1G
OSC
OSC
0
1
/4
PIC16(L)F1847
TMR0CS
Timer0 Module
TMR0
Timer1 Module
Control Logic
Timer1 Gate
EN
TMR1H:TMR1L
Overflow
DS41453A-page 319
TMR0IF
Set