PIC18F65K90-I/PTRSL Microchip Technology, PIC18F65K90-I/PTRSL Datasheet - Page 395
![MCU PIC 32K FLASH MEM XLP 64TQFP](/photos/6/81/68123/c04-066_pf_sml.jpg)
PIC18F65K90-I/PTRSL
Manufacturer Part Number
PIC18F65K90-I/PTRSL
Description
MCU PIC 32K FLASH MEM XLP 64TQFP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Specifications of PIC18F65K90-I/PTRSL
Core Size
8-Bit
Program Memory Size
32KB (16K x 16)
Core Processor
PIC
Speed
64MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
53
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TFQFP
Controller Family/series
PIC18
Eeprom Memory Size
1024Byte
Ram Memory Size
2048Byte
Cpu Speed
16MIPS
No. Of Timers
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F65K90-I/PTRSL
Manufacturer:
Microchip Technology
Quantity:
10 000
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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 Figure 25-1.
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 (Register 25-1). The
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. Equation 25-1 shows how the
comparator voltage reference is computed.
REGISTER 25-1:
2010 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
REF
circuit is powered on
circuit is powered down
voltage level is output on the CV
voltage level is disconnected from the CV
SS
W = Writable bit
‘1’ = Bit is set
-) + (CVR<4:0>/32) (V
) + (CVR<4:0>/32) (AV
CVRSS
R/W-0
REF
REF
REF
Source Selection bit
Output Enable bit
Value Selection (0 CVR<4:0> 31) bits
R/W-0
CVR4
Preliminary
REF
RSRC
RSRC
DD
+ – V
– AV
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
= V
= AV
PIC18F87K90 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 Table 31-2 in Section 31.0 “Electrical
Characteristics” ).
REF
pin
REF
DD
If CVRSS = 1 :
C
If CVRSS = 0 :
C
)
-)
VREF
VREF
+ – V
- that are multiplexed with RA3 and RA2. The
– AV
REF
= (V
= (AV
REF
SS
pin
REF
-
DD
SS
R/W-0
CVR2
-) + (CVR<4:0>/32) • (V
) + (CVR<4:0>/32) • (AV
and V
SS
, or the external V
x = Bit is unknown
R/W-0
CVR1
DS39957B-page 395
REF
DD
+ – V
– AV
R/W-0
CVR0
REF
REF
SS
+ and
bit 0
)
-)
REF
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