PIC16F1947-I/PT Microchip Technology Inc., PIC16F1947-I/PT Datasheet - Page 155
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PIC16F1947-I/PT
Manufacturer Part Number
PIC16F1947-I/PT
Description
64 TQFP 10x10x1mm TRAY28KB Flash, 1KB RAM, 256B EEPROM, LCD, 1.8-5.5V
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16LF1946-IPT.pdf
(448 pages)
Specifications of PIC16F1947-I/PT
A/d Inputs
17-Channel, 10-Bit
Comparators
3
Cpu Speed
8 MIPS
Eeprom Memory
256 Bytes
Input Output
54
Interface
CAN/I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
64-pin TQFP
Programmable Memory
28K Bytes
Ram Size
1K Bytes
Speed
32 MHz
Timers
4-8-bit, 1-16-bit
Voltage, Range
1.8-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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14.0
The Fixed Voltage Reference, or FVR, is a stable
voltage reference, independent of V
2.048V or 4.096V selectable output levels. The output
of the FVR can be configured to supply a reference
voltage to the following:
• ADC input channel
• ADC positive reference
• Comparator positive input
• Digital-to-Analog Converter (DAC)
• Capacitive Sensing (CPS) module
• LCD bias generator
The FVR can be enabled by setting the FVREN bit of
the FVRCON register.
FIGURE 14-1:
2010 Microchip Technology Inc.
FIXED VOLTAGE REFERENCE
(FVR)
VOLTAGE REFERENCE BLOCK DIAGRAM
CDAFVR<1:0>
ADFVR<1:0>
FVRRDY
FVREN
DD
, with 1.024V,
2
2
+
_
Preliminary
X
X
X
X
X
X
1.024V Fixed
Reference
1
2
4
1
2
4
14.1
The output of the FVR supplied to the ADC,
Comparators, DAC and CPS module is routed through
two independent programmable gain amplifiers. Each
amplifier can be configured to amplify the reference
voltage by 1x, 2x or 4x, to produce the three possible
voltage levels.
The ADFVR<1:0> bits of the FVRCON register are
used to enable and configure the gain amplifier settings
for the reference supplied to the ADC module. Refer-
ence
(ADC) Module”
The CDAFVR<1:0> bits of the FVRCON register are
used to enable and configure the gain amplifier settings
for the reference supplied to the Comparators, DAC
and CPS module. Reference
Analog Converter (DAC)
“Comparator Module”
Sensing (CPS) Module”
14.2
When the Fixed Voltage Reference module is enabled, it
requires time for the reference and amplifier circuits to
stabilize. Once the circuits stabilize and are ready for use,
the FVRRDY bit of the FVRCON register will be set. See
Section 30.0 “Electrical Specifications”
minimum delay requirement.
Section 16.0 “Analog-to-Digital Converter
PIC16F/LF1946/47
Independent Gain Amplifiers
FVR Stabilization Period
(To LCD Bias Generator)
(To Comparators, DAC)
(To ADC Module)
FVR VREF
FVR BUFFER1
FVR BUFFER2
for additional information.
and
for additional information.
Section 26.0 “Capacitive
Section 17.0 “Digital-to-
Module”,
DS41414B-page 155
Section 18.0
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