PIC18F85J90-I/PT Microchip Technology, PIC18F85J90-I/PT Datasheet - Page 17

• 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

3.1
© 2009 Microchip Technology Inc.
REGISTER OVERVIEW
Chapter 3.
The PIC18F85J90 contains registers that are used during calibration and registers that
can be read through the UART. The registers are named to describe each phase,
specific measurement, and in the case of the calibration registers, the calibration
function.
The intent of the calibration process is to yield output registers that are decimal
representation of the final energy, power, current or voltage value.
Instantaneous Power Registers
The PHy_W and PHy_VA registers contain the decimal representation of the active
power (W) and apparent power (VA) post calibration. The reactive power calculation is
not implemented at this time.
The final correction factors to convert these registers to units of energy are located in
the _GLSB registers. These correction factors can be automatically calculated and
loaded by using the PC calibration software. The exact representation depends on the
meter values that are entered in the software. For example, at 10A and 220V, power in
the PHy_W register is 0.1 mW/LSB.
Calibration Registers
The calibration registers fall into one of three categories: offset, gain, and LSB, denoted
by _OFF, _GAIN and _GLSB register names.
In addition there are two registers, CFNUM and CFDEN, that calibrate the output pulse,
CF.
Calculation and Register Description
MCP3909/PIC18F85J90 SINGLE PHASE
ENERGY METER REFERENCE DESIGN
DS51884A-page 17