PIC18LF6310T-I/PT Microchip Technology, PIC18LF6310T-I/PT Datasheet - Page 267

• Manufacturer Part Number: PIC18LF6310T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,64PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF6310T-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

21.2
A single comparator is shown in
the relationship between the analog input levels and
the digital output. When the analog input at V
than the analog input, V
comparator is a digital low level. When the analog input
at V
of the comparator is a digital high level. The shaded
areas of the output of the comparator, in
represent the uncertainty due to input offsets and
response time.
21.3
Depending on the Comparator Operating mode, either
an external or internal voltage reference may be used.
The analog signal present at V
signal at V
is adjusted accordingly
FIGURE 21-2:
21.3.1
When external voltage references are used, the
comparator module can be configured to have the com-
parators operate from the same, or different reference
sources. However, threshold detector applications may
require the same reference. The reference signal must
be between V
pin of the comparator(s).
 2010 Microchip Technology Inc.
V
V
Output
IN
IN
IN
-
+
+ is greater than the analog input, V
V
V
IN
IN
Comparator Operation
Comparator Reference
+
-
IN
EXTERNAL REFERENCE SIGNAL
+ and the digital output of the comparator
SS
and V
+
–
SINGLE COMPARATOR
DD
(Figure
and can be applied to either
IN
-, the output of the
21-2).
Figure
IN
- is compared to the
21-2, along with
IN
Output
Figure
-, the output
IN
PIC18F6310/6410/8310/8410
+ is less
21-2,
21.3.2
The comparator module also allows the selection of an
internally generated voltage reference from the com-
parator voltage reference module. This module is
described in more detail in
Voltage Reference
The internal reference is only available in the mode
where four inputs are multiplexed to two comparators
(CM<2:0> = 110). In this mode, the internal voltage
comparators.
21.4
Response time is the minimum time, after selecting a
new reference voltage or input source, before the
comparator output has a valid level. If the internal ref-
erence is changed, the maximum delay of the internal
voltage reference must be considered when using the
comparator outputs. Otherwise, the maximum delay of
the comparators should be used (see
“Electrical
21.5
The comparator outputs are read through the CMCON
register. These bits are read-only. The comparator
outputs may also be directly output to the RF2 and RF1
I/O pins. When enabled, multiplexors in the output path
of the RF2 and RF1 pins will switch and the output of
each pin will be the unsynchronized output of the
comparator.
comparators is related to the input offset voltage and
the response time given in the specifications.
Figure 21-3
diagram.
The TRISF bits will still function as an output enable/
disable for the RF2 and RF1 pins while in this mode.
The polarity of the comparator outputs can be changed
using the C2INV and C1INV bits (CMCON<5:4>).
reference is applied to the V
Note 1: When reading the PORT register, all pins
2: Analog levels on any pin defined as a dig-
Comparator Response Time
Comparator Outputs
INTERNAL REFERENCE SIGNAL
Characteristics”).
configured as analog inputs will read as a
‘0’. Pins configured as digital inputs will
convert an analog input according to the
Schmitt Trigger input specification.
ital input may cause the input buffer to
consume more current than is specified.
shows the comparator output block
The
Module”.
uncertainty
Section 22.0 “Comparator
of
DS39635C-page 267
IN
+ pin of both
each
Section 27.0
of
the