PIC16LF1933-E/MV Microchip Technology, PIC16LF1933-E/MV Datasheet - Page 137

• Manufacturer Part Number: PIC16LF1933-E/MV
• Description: IC MCU 8BIT 7KB FLASH 28UQFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16LF1933-E/MV

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-UFQFN Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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.
14.1
The output of the FVR supplied to the ADC,
Comparators, DAC and CPS is routed through two
independent programmable gain amplifiers. Each
FIGURE 14-1:
 2011 Microchip Technology Inc.
FIXED VOLTAGE REFERENCE
(FVR)
Independent Gain Amplifiers
VOLTAGE REFERENCE BLOCK DIAGRAM
CDAFVR<1:0>
ADFVR<1:0>
FVRRDY
FVREN
DD
2
2
, with 1.024V,
+
_
Preliminary
X
X
X
X
X
X
1.024V Fixed
Reference
1
2
4
1
2
4
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 Section 15.0 “Analog-to-Digital Converter
(ADC) Module” for additional information.
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 DAC, CPS and comparator
module. Reference Section 17.0 “Digital-to-Analog
Converter (DAC) Module”, Section 18.0 “Comparator
Module” and
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
in the applicable Electrical Specifications Chapter for
the minimum delay requirement.
FVR Stabilization Period
(To LCD Bias Generator)
for additional information.
(To Comparators, DAC)
Section 26.0 “Capacitive Sensing (CPS)
(To ADC Module)
FVR VREF
FVR BUFFER1
FVR BUFFER2
PIC16(L)F1933
DS41575A-page 137