MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 27

• 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

5.3
Multiplier mode allows the user to retrieve the output
of the multiplier on the MCP3909 device. Data is
presented in a 20 bit (19 bit + sign) protocol, MSB first.
A data ready flag (DR) is output for every MCLK/256
TABLE 5-2:
FIGURE 5-4:
© 2009 Microchip Technology Inc.
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
NEG / SDO
F2 / SCK
F1 / SDI
F0 / CS
Multiplier Output Mode
Multiplier Code
MULTIPLIER OUTPUT MODE CODING
Hi-z
Multiplier Output Mode.
DR
Binary
=
(
-------------------------------------------------------------------------------- - 524288 8.06 G
CH0
SIGN MSB
1
D19
2
D18
+
–
3
D17
CH0
4
D16
V
–
REF
) CH1
X 20
Hi-z
(
X 20
2
clock cycles and a new multiplier output value is ready.
If the multiplier value is not clocked out of the device it
will be over-written. Data is clocked out on the rising
edge of SCK.
17 18
+
D3
–
CH1
D2
19 20
D1
–
)
LSB
D0
•
0
+524287
+524286
Decimal
-524287
-524288
•
-1
0
MCP3909
Hi-z
DS22025B-page 27
•