MCP3909EV-MCU16 Microchip Technology, MCP3909EV-MCU16 Datasheet - Page 28
MCP3909EV-MCU16
Manufacturer Part Number
MCP3909EV-MCU16
Description
EVALUATION BOARD FOR MCP3909
Manufacturer
Microchip Technology
Datasheets
1.MCP3909T-ISS.pdf
(44 pages)
2.MCP3909T-ISS.pdf
(104 pages)
3.MCP3909EV-MCU16.pdf
(38 pages)
Specifications of MCP3909EV-MCU16
Number Of Adc's
2
Number Of Bits
16
Sampling Rate (per Second)
15k
Data Interface
Serial
Inputs Per Adc
1 Differential
Input Range
±1 V
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
MCP3909
Silicon Manufacturer
Microchip
Application Sub Type
ADC
Kit Application Type
Data Converter
Silicon Core Number
MCP3909
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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MCP3909 / dsPIC33F 3-Phase Energy Meter Reference Design
DS51723A-page 28
After system power-up, the MCU enters the initialization process, which includes
proper configuration of the I/O ports and on-chip peripherals (such as timer, UART, SPI
and IC). At the same time, the system control parameters can be loaded from the
external EEPROM and variables are all initialized.
Since most tasks of this system are accomplished through interrupts, only three tasks
are carried out in the system main loop, which are interpreting/processing UART
communication protocol, calculating parameters, and detecting neutral current. The
UART communication is performed in function UART_process(), the executing
frequency of which depends on the polling frequency of the upper computer.
Parameters are calculated by the function Calculation(), which is executed once every
3 cycles of the power grid. Neutral current is detected by function ComputeNeutral-
Current(), and computing is performed once every 16 cycles of the power grid.
© 2009 Microchip Technology Inc.
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