PIC16F1825T-ESS datasheet(321/448 Pages) MICROCHIP

321 / 448 page

 2010-2012 Microchip Technology Inc.

DS41440C-page 321

PIC16(L)F1825/1829

27.0 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

• High-power range with variable voltage references

• Multiple timer resources

• Software control

• Operation during Sleep

FIGURE 27-1:

CAPACITIVE SENSING BLOCK DIAGRAM

Note 1:

Reference CPSCON1 register (Register 27-2) for channels implemented on each device.

If CPSON = 0, disabling capacitive sensing, no channel is selected.

TMR0CS

CPS0

CPS1

CPS2

CPS3

CPS4

CPS5

CPS6

CPSCH<3:0>

Capacitive

Sensing

Oscillator

CPSOSC

CPSON

CPSRNG<1:0>

TMR0

Set

TMR0IF

Overflow

T0XCS

T0CKI

CPSOUT

CPS7

CPSCLK

FOSC/4

Timer0 Module

CPSON(2)

T1CS<1:0>

T1OSC/

T1CKI

TMR1H:TMR1L

T1GSEL<1:0>

Timer1 Gate

Control Logic

T1G

FOSC

FOSC/4

Timer1 Module

sync_C1OUT

sync_C2OUT

Int.

Ref.

FVR

DAC

Ref+

Ref-

CPSRM

CPS9(1)

CPS10(1)

CPS11(1)

CPS8(1)

Output

PIC16F1825T-ESS Datasheet(PDF) 321 Page - Microchip Technology

PIC16F1825T-ESS Datasheet(HTML) 321 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL