PIC18F26K80-I/ML Microchip Technology Inc., PIC18F26K80-I/ML Datasheet - Page 385
![no-image](/images/manufacturer_photos/0/4/440/microchip_technology_inc__sml.jpg)
PIC18F26K80-I/ML
Manufacturer Part Number
PIC18F26K80-I/ML
Description
28 QFN-S 6X6MM TUBE, ECAN, 64KB FLASH, 4KB RAM, 16 MIPS, 12-BIT ADC, CTMU
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F46K80-IPT.pdf
(628 pages)
Specifications of PIC18F26K80-I/ML
A/d Inputs
8-Channel, 12-Bit
Comparators
2
Cpu Speed
16 MIPS
Eeprom Memory
256 Bytes
Input Output
24
Interface
I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
28-pin QFN
Programmable Memory
64K Bytes
Ram Size
3.6K Bytes
Speed
64 MHz
Temperature Range
–40 to 125 °C
Timers
2-8-bit, 3-16-bit
Voltage, Range
1.8-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
- Current page: 385 of 628
- Download datasheet (6Mb)
25.0
The comparator voltage reference is a 32-tap resistor
ladder network that provides a selectable reference
voltage. Although its primary purpose is to provide a
reference for the analog comparators, it may also be
used independently of them.
A block diagram of the module is shown in
The resistor ladder is segmented to provide a range of
CV
conserve power when the reference is not being used.
The module’s supply reference can be provided from
either device V
25.1
The comparator voltage reference module is controlled
through the CVRCON register
comparator voltage reference provides a range of
output voltage with 32 levels.
The CVR<4:0> selection bits (CVRCON<4:0>) offer a
range of output voltages.
the comparator voltage reference is computed.
REGISTER 25-1:
2011 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4-0
REF
CVREN
R/W-0
values and has a power-down function to
COMPARATOR VOLTAGE
REFERENCE MODULE
Configuring the Comparator
Voltage Reference
DD
CVREN: Comparator Voltage Reference Enable bit
1 = CV
0 = CV
CVROE: Comparator V
1 = CV
0 = CV
CVRSS: Comparator V
1 = Comparator reference source, CV
0 = Comparator reference source, CV
CVR<4:0>: Comparator V
When CVRSS = 1 :
CV
When CVRSS = 0 :
CV
/V
CVROE
REF
REF
R/W-0
SS
or an external voltage reference.
CVRCON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER
= (V
= (AV
REF
REF
REF
REF
Equation 25-1
REF
circuit powered on
circuit powered down
voltage level is output on CV
voltage level is disconnected from CV
SS
W = Writable bit
‘1’ = Bit is set
-) + (CVR<4:0>/32) (V
) + (CVR<4:0>/32) (AV
CVRSS
(Register
R/W-0
REF
REF
shows the how
REF
Figure
Source Selection bit
Output Enable bit
25-1). The
Value Selection 0 CVR<4:0> 31 bits
R/W-0
CVR4
25-1.
Preliminary
RSRC
RSRC
REF
DD
REF
+ – V
– AV
= V
= AV
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
pin
PIC18F66K80 FAMILY
REF
R/W-0
CVR3
REF
SS
EQUATION 25-1:
The comparator reference supply voltage can come
from either V
V
voltage source is selected by the CVRSS bit
(CVRCON<5>).
The settling time of the comparator voltage reference
must be considered when changing the CV
output (see
Characteristics”
DD
REF
REF
)
+ – V
If CVRSS = 1 :
CV
If CVRSS = 0 :
CV
-)
– AV
- that are multiplexed with RA3 and RA2. The
pin
REF
REF
REF
SS
= V
= AV
-
(
(
Table 31-2
DD
R/W-0
CVR2
REF
SS
and V
).
- +
+
CVR<4:0>
CVR<4:0>
SS
32
32
in
, or the external V
x = Bit is unknown
Section 31.0 “Electrical
R/W-0
CVR1
)
)
• (V
• (AV
DS39977C-page 385
REF
DD
+ – V
– AV
R/W-0
CVR0
REF
REF
SS
+ and
)
-)
bit 0
REF
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