PIC18F66J90-I/PT Microchip Technology, PIC18F66J90-I/PT Datasheet - Page 315
![IC PIC MCU FLASH 64KB 64-TQFP](/photos/6/81/68123/c04-066_pf_sml.jpg)
PIC18F66J90-I/PT
Manufacturer Part Number
PIC18F66J90-I/PT
Description
IC PIC MCU FLASH 64KB 64-TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18F67J90-IPT.pdf
(450 pages)
2.PIC18F67J90-IPT.pdf
(3 pages)
3.PIC18F67J90-IPT.pdf
(10 pages)
4.PIC18F66J90-IPT.pdf
(444 pages)
Specifications of PIC18F66J90-I/PT
Program Memory Type
FLASH
Program Memory Size
64KB (32K x 16)
Package / Case
64-TFQFP
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
Number Of I /o
51
Ram Size
3.8K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3923 B
Interface Type
AUSART, EUSART, I2C, SPI
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
51
Number Of Timers
4
Operating Supply Voltage
2.65 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, DV164136, DM163030
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC162079 - HEADER MPLAB ICD2 18F85J90 64/80AC164328 - MODULE SKT FOR 80TQFP
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F66J90-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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23.5
Time can be precisely measured after the ratio (C/I) is
measured from the current and capacitance calibration
step by following these steps:
1.
2.
3.
4.
5.
FIGURE 23-3:
© 2009 Microchip Technology Inc.
Initialize the A/D Converter and the CTMU.
Set EDG1STAT.
Set EDG2STAT.
Perform an A/D conversion.
Calculate the time between edges as T = (C/I) * V,
where I is calculated in the current calibration step
(Section 23.3.1 “Current Source Calibration”),
C is calculated in the capacitance calibration step
(Section 23.3.2 “Capacitance Calibration”) and
V is measured by performing the A/D conversion.
Measuring Time with the CTMU
Module
TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR TIME
MEASUREMENT
CTEDG1
CTEDG2
AN
R
PR
X
Preliminary
PIC18F87J90 FAMILY
EDG2
It is assumed that the time measured is small enough
that the capacitance C
the A/D Converter. For the smallest time measurement,
always set the A/D Channel Select register (AD1CHS)
to an unused A/D channel; the corresponding pin for
which is not connected to any circuit board trace. This
minimizes added stray capacitance, keeping the total
circuit capacitance close to that of the A/D Converter
itself (25 pF). To measure longer time intervals, an
external capacitor may be connected to an A/D
channel, and this channel selected when making a time
measurement.
EDG1
C
AD
A/D Converter
PIC18F87J90
Current Source
CTMU
Output Pulse
OFFSET
provides a valid voltage to
DS39933C-page 313
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