MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 26

• Manufacturer Part Number: MCP3909RD-1PH1
• Description: BOARD DES MCP3909 ENERGY METER
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-1PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP3909, PIC18F85J90
• Primary Attributes: Single Phase Shunt Energy Meter
• Secondary Attributes: 16 Bit ADC
• Ic Function: Single Phase Energy Measurement IC
• Supply Voltage Range: 4.5V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 24
• Interface Type: SPI
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MCP3909/PIC18F85J90 Single Phase Energy Meter Reference Design
3.4.12
3.4.13
DS51884A-page 26
ENERGY_VA_
ENERGY_VAR (NOT IMPLEMENTED)
REGISTER 3-12:
These four registers represent the total apparent energy accumulated so far. Energy
from each LINE_CYC line cycles is:
EQUATION 3-2:
Note that during calibration, this value, ENERGY_VA_Z, and ENERGY_VA_L_RAW
will all have the same value.
This register is updated every LINE_CYC line cycles (updating ends after first update
if calibration is enabled).
REGISTER 3-13:
NOT IMPLEMENTED IN THIS FIRMWARE/SOFTWARE RELEASE.
ENERGY_VA
ENERGY_VA_L_RAW
+
+
Where:
(
(
ENERGY_VAR_L_RAW
PHB_I_RMS_RAW
PHC_I_RMS_RAW
ENERGY_VA_Z
ENERGY_VA_L
PERIOD =
ENERGY_VA
ENERGY_VAR_Z
ENERGY_VAR_L
ENERGY_VAR
Name
Name
=
ENERGY_VA
the period (in 1.6 µs clock ticks) for the most recent LINE_CYC
line cycles.
•
•
ENERGY_VA_ REGISTERS
ENERGY_VAR REGISTER
PHB_V_RMS_RAW
PHC_V_RMS_RAW
Bits
64
64
32
48
+
(
PHA_I_RMS_RAW
Bit
64
64
32
48
Address
0x0DE
0x0EE
0x0E6
0x0F4
)
)
•
•
Address
⎛
⎝
⎛
⎝
0x100
0x108
0x116
0x110
PHB_VA_GAIN
-------------------------------------- -
PHC_VA_GAIN
-------------------------------------- -
32768
32768
•
Cof
R
R
R
R
PHA_V_RMS_RAW
Cof
R
R
R
R
⎞
⎠
⎞
⎠
•
© 2009 Microchip Technology Inc.
PERIOD 128
------------------------------------- -
65536
)
•
⎛
⎝
•
PHA_VA_GAIN
-------------------------------------- -
32768
⎞
⎠