PIC16F1946-E/PT Microchip Technology, PIC16F1946-E/PT Datasheet - Page 179

• Manufacturer Part Number: PIC16F1946-E/PT
• Description: MCU 8BIT 8K FLASH 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1946-E/PT

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 17x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-TFQFP
• Controller Family/series: PIC16F
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Interface: EUSART, I2C, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.7
The CxNCH<1:0> bits of the CMxCON0 register direct
one of four analog pins to the comparator inverting
input.
17.8
The comparator output is indeterminate for a period of
time after the change of an input source or the selection
of a new reference voltage. This period is referred to as
the response time. The response time of the comparator
differs from the settling time of the voltage reference.
Therefore, both of these times must be considered when
determining the total response time to a comparator
input change. See the Comparator and Voltage
Reference Specifications in Section 29.0 “Electrical
Specifications” for more details.
17.9
The comparators can be used as general purpose
comparators. Their outputs can be brought out to the
pins. When the ECCP Auto-Shutdown is active it can
use one or both comparator signals. If auto-restart is
also enabled, the comparators can be configured as a
closed loop analog feedback to the ECCP, thereby,
creating an analog controlled PWM.
FIGURE 17-3:
 2010 Microchip Technology Inc.
Note:
Comparator Negative Input
Selection
Comparator Response Time
Interaction with ECCP Logic
Legend: C
V
To use CxIN+ and CxINx- pins as analog
input, the appropriate bits must be set in
the ANSEL register and the corresponding
TRIS bits must also be set to disable the
output drivers.
A
Note 1: See Section 29.0 “Electrical Specifications”.
Rs < 10K
I
R
R
V
V
ANALOG INPUT MODEL
LEAKAGE
A
T
PIN
IC
S
Analog
Input
pin
= Input Capacitance
= Leakage Current at the pin due to various junctions
= Interconnect Resistance
= Source Impedance
= Analog Voltage
= Threshold Voltage
C
5 pF
PIN
V
DD
V
V
Preliminary
T
T
 0.6V
 0.6V
17.10 Analog Input Connection
A simplified circuit for an analog input is shown in
Figure 17-3. Since the analog input pins share their
connection with a digital input, they have reverse
biased ESD protection diodes to V
analog input, therefore, must be between V
If the input voltage deviates from this range by more
than 0.6V in either direction, one of the diodes is
forward biased and a latch-up may occur.
A maximum source impedance of 10 k is recommended
for the analog sources. Also, any external component
connected to an analog input pin, such as a capacitor or
a Zener diode, should have very little leakage current to
minimize inaccuracies introduced.
Note 1: When reading a PORT register, all pins
I
Vss
LEAKAGE
PIC16F/LF1946/47
2: Analog levels on any pin defined as a
Considerations
configured as analog inputs will read as a
‘0’. Pins configured as digital inputs will
convert as an analog input, according to
the input specification.
digital input, may cause the input buffer to
consume more current than is specified.
R
IC
(1)
To Comparator
DS41414A-page 177
DD
and V
SS
and V
SS
. The
DD
.