PIC18F85J90-I/PT Microchip Technology, PIC18F85J90-I/PT Datasheet - Page 33

• Manufacturer Part Number: PIC18F85J90-I/PT
• Description: IC PIC MCU FLASH 16KX16 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F85J90-I/PT

• Core Size: 8-Bit
• Program Memory Size: 32KB (16K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Type: FLASH
• Ram Size: 2K 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
• Package / Case: 80-TFQFP
• Controller Family/series: PIC18
• No. Of I/o's: 67
• Ram Memory Size: 2KB
• Cpu Speed: 40MHz
• No. Of Timers: 4
• No. Of Pwm Channels: 2
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: AUSART, EUSART, I2C, SPI
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 67
• Number Of Timers: 4
• 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
• Package: 80TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 2.5|3.3 V
• 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: Details

5.1
© 2009 Microchip Technology Inc.
CALIBRATION OVERVIEW
The method to calculate the values for the calibration registers in “Chapter
3. “PIC18F85J90 Calculation and Register Description” are described in this
chapter. These registers are used to remove offset, set gain and phase adjustments,
and include (units)/LSB adjustments for the meter outputs. The calibration flow charts
and equations presented in this section are all automated using Microchip’s “Single
Phase Energy Meter Calibration Software”, downloadable from Microchip’s energy
metering web site. The following calibration routines are described in this chapter.
• Active Power Calibration
• RMS Current and Voltage Calibration
• Apparent Power Calibration
The method of calibrating these three separate signal flows can be combined into
4 different calibration configurations. These configurations consist of supplying specific
voltages and currents at specific phase angles to the meter during calibration.
Depending on the accuracy and meter type, not all 4 calibration configurations are
required to fully calibrate a meter. In some cases only a single point calibraton is
required. The software allows individual configurations to be turned on or off when
going through the calibration flow.
Chapter 5. Meter Calibration
MCP3909/PIC18F85J90 SINGLE PHASE
ENERGY METER REFERENCE DESIGN
DS51884A-page 33