PIC16F1847-I/SO Microchip Technology, PIC16F1847-I/SO Datasheet - Page 319
PIC16F1847-I/SO
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
Datasheets
1.PIC16F1847-ISO.pdf
(408 pages)
2.PIC16F1847-ISO.pdf
(408 pages)
3.PIC16F1847-ISO.pdf
(10 pages)
Specifications of PIC16F1847-I/SO
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F1847-I/SO
Manufacturer:
MICROCHIP
Quantity:
30 000
- Current page: 319 of 408
- Download datasheet (4Mb)
27.1
The CPS module can monitor multiple inputs for the
PIC device. See
inputs and channel select. The capacitive sensing
inputs are defined as CPSx, as applicable to device. To
determine if a frequency change has occurred the user
must:
• Select the appropriate CPS pin by setting the
• Set the corresponding ANSEL bit.
• Set the corresponding TRIS bit.
• Run the software algorithm.
Selection of the CPSx pin while the module is enabled
will cause the capacitive sensing oscillator to be on the
CPSx pin. Failure to set the corresponding ANSEL and
TRIS bits can cause the capacitive sensing oscillator to
stop, leading to false frequency readings.
27.2
The capacitive sensing oscillator consists of a constant
current source and a constant current sink, to produce
a triangle waveform. The CPSOUT bit of the
CPSCON0 register shows the status of the capacitive
sensing oscillator, whether it is a sinking or sourcing
current. The oscillator is designed to drive a capacitive
load (single PCB pad) and at the same time, be a clock
source to either Timer0 or Timer1. The oscillator has
three different current settings as defined by
CPSRNG<1:0> of the CPSCON0 register. The different
current settings for the oscillator serve two purposes:
• Maximize the number of counts in a timer for a
• Maximize the count differential in the timer during
2011 Microchip Technology Inc.
appropriate CPSCH bits of the CPSCON1 register.
fixed time base.
a change in frequency.
Analog MUX
Capacitive Sensing Oscillator
Register 27-2
for details on number of
Preliminary
27.3
The capacitive sensing oscillator uses voltage refer-
ences to provide two voltage thresholds for oscillation.
The upper voltage threshold is referred to as Ref+ and
the lower voltage threshold is referred to as Ref-.
The user can elect to use fixed voltage references,
which are internal to the capacitive sensing oscillator,
or variable voltage references, which are supplied by
the Fixed Voltage Reference (FVR) module and the
Digital-to-Analog Converter (DAC) module.
When the fixed voltage references are used, the V
voltage determines the lower threshold level (Ref-) and
the V
(Ref+).
When the variable voltage references are used, the
DAC voltage determines the lower threshold level
(Ref-) and the FVR voltage determines the upper
threshold level (Ref+). An advantage of using these ref-
erence sources is that oscillation frequency remains
constant with changes in V
Different oscillation frequencies can be obtained
through the use of these variable voltage references.
The more the upper voltage reference level is lowered
and the more the lower voltage reference level is
raised, the higher the capacitive sensing oscillator
frequency becomes.
Selection between the voltage references is controlled
by the CPSRM bit of the CPSCON0 register. Setting
this bit selects the variable voltage references and
clearing this bit selects the fixed voltage references.
Please see
(FVR)”
(DAC) Module”
variable voltage levels.
DD
and
voltage determines the upper threshold level
Voltage References
Section 17.0 “Digital-to-Analog Converter
Section 14.0 “Fixed Voltage Reference
PIC16(L)F1847
for more information on configuring the
DD
.
DS41453A-page 321
SS
Related parts for PIC16F1847-I/SO
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, SOIC-18
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, SSOP-20
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, DIP-18
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, QFN-28
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, QFN-28
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, QFN-28
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, SSOP-20
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 20MHZ, DIP-40
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, QFN-28
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 20MHZ, MQFP-44
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 20MHZ, QFN-20
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC, 8BIT MCU, PIC16F, 32MHZ, QFN-28
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
MCU 14KB FLASH 768B RAM 64-TQFP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
7 KB Flash, 384 Bytes RAM, 32 MHz Int. Osc, 16 I/0, Enhanced Mid Range Core, Low
Manufacturer:
Microchip Technology
Part Number:
Description:
14KB Flash, 512B RAM, 256B EEPROM, LCD, 1.8-5.5V 40 UQFN 5x5x0.5mm TUBE
Manufacturer:
Microchip Technology
Datasheet: