MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 42

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

MCP3909 3-Phase Energy Meter Reference Design
FIGURE 4-1:
FIGURE 4-2:
DS51643B-page 38
TABLE 4-2:
READ on ENERGY_W_L_RAW Register
TABLE 4-1:
7
WRITE of 255d to
PHA_W_OFF Register
7
7
7
Command Byte
6
Command Byte
6
6
6
# Bytes to Read (2 Bytes ASCII)
5
5
5
5
Description
4
4
4
4
4.1.1.4
Write specified bytes.
WRITE Command Protocol.
4.1.1.5
Read Command Protocol.
3
DESCRIPTION
3
3
3
ASCII Data
Note:
Note:
READ COMMAND EXAMPLES
2
Example: 'W030000102030405060708090A0B0C0D0E0FX'.
Returns: 'W030000102030405060708090A0B0C0D0E0FX'.
Example: 'R03010X' (read 16 bytes starting at address 30h).
Returns: 'R030000102030405060708090A0B0C0D0E0FX'
2
2
2
WRITE COMMAND EXAMPLES
1
1
1
1
0
0
0
0
“R” READ: READ STARTING AT SPECIFIED ADDRESS
“W” WRITE: WRITE STARTING AT SPECIFIED ADDRESS
If number of data characters is odd, the last character (the one just prior to
the 'X') will be ignored.
For 16 bytes, there are 32 ASCII characters returned or two characters per
byte.
7
7
7
7
6
6
6
6
5
5
5
5
Command ASCII
4
4
“W 170 00 F F X”
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
COMMAND ASCII
3 Address Bytes (ASCII)
3 Address Bytes (ASCII)
7
“R 0D4 06 X”
7
7
7
6
6
6
6
“X” (ASCII)
5
5
5
“X” (ASCII)
5
4
4
4
4
3
57 31 37 30 30 30 46 46 58
3
3
3
2
2
2
2
1
Command Hex
1
1
1
0
0
0
0
52 00 44 34 30 36 58
COMMAND HEX
7
7
© 2008 Microchip Technology Inc.
6
6
5
5
4
4
3
3
2
2
1
1
0
0