Teridian 71M6531 User manual

71M6531 Demo Board User’s Manual
v1.5 © 2007-2008 TERIDIAN Semiconductor Corporation Page: 1 of 83
71M6531 Demo Board
USER’S MANUAL
6/2/2008 5:23:00 PM
v1.5
TERIDIAN Semiconductor Corporation
6440 Oak Canyon Rd., Suite 100
Irvine, CA 92618-5201
Phone: [phone] ▪Fax: [phone]
http://www.teridian.com/
[email protected]

71M6531 Demo Board User’s Manual
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71M6531 Demo Board User’s Manual
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TERIDIAN Semiconductor Corporation makes no warranty for the use of its products, other than expressly contained in the
Company’s warranty detailed in the TERIDIAN Semiconductor Corporation standard Terms and Conditions. The company assumes
no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed
herein at any time without notice and does not make any commitment to update the information contained herein.

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71M6531
Single-Phase Energy Meter IC
DEMO BOARD
USER’S MANUAL

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Table of Contents
1GETTING STARTED...........................................................................................................................................9
1.1 General...............................................................................................................................................................9
1.2 Safety and ESD Notes.......................................................................................................................................9
1.3 Demo Kit Contents............................................................................................................................................9
1.4 Compatibility....................................................................................................................................................10
1.5 Suggested Equipment not Included ..............................................................................................................10
1.6 Demo Board Test Setup..................................................................................................................................10
1.6.1 Power Supply Setup...................................................................................................................................12
1.6.2 CABLE for Serial Connection .....................................................................................................................13
1.6.3 Checking Operation....................................................................................................................................13
1.6.4 Serial Connection Setup for the PC............................................................................................................14
1.7 Using the Demo Board....................................................................................................................................15
1.7.1 Cycling the LCD Display............................................................................................................................. 15
1.7.2 Serial Command Line Interface (CLI).........................................................................................................16
1.7.3 Communicating via Intel Hex Records .......................................................................................................22
1.7.4 Using the Battery Modes ............................................................................................................................24
1.8 Using the Demo Board for Metering Functions............................................................................................25
1.8.1 Modifying Demo Code to CT or SHUNT Mode...........................................................................................25
1.8.2 Using the Demo Board in SHUNT and CT Modes .....................................................................................25
1.8.3 Adjusting the kh Factor for the Demo Board ..............................................................................................26
1.8.4 Adjusting the Demo Boards to Different CT Winding Ratios ......................................................................27
1.8.5 Adjusting the Demo Boards to Voltage Transformers or Different Voltage Dividers................................... 27
1.8.6 Wiring of the Demo Board and a Shunt Resistor........................................................................................27
1.9 Calibration Parameters...................................................................................................................................30
1.9.1 General Calibration Procedure...................................................................................................................30
1.9.2 Updating the 6531_demo.hex file...............................................................................................................30
1.9.3 Calibration Macro File ................................................................................................................................31
1.9.4 Updating Calibration Data in EEPROM or Flash ........................................................................................31
1.9.5 Loading the 6531_demo.hex file into the Demo Board...............................................................................31
1.9.6 The Programming Interface of the 71M6531..............................................................................................33
1.10 Demo Code ......................................................................................................................................................34
1.10.1 Demo Code Description .............................................................................................................................34
1.10.2 Accessing LCD and Sleep Modes from Brownout Mode............................................................................34
1.10.3 Demo Code Memory Locations..................................................................................................................34
1.11 Emulator Operation.........................................................................................................................................41
2APPLICATION INFORMATION........................................................................................................................43
2.1 Calibration Theory...........................................................................................................................................43
2.1.1 Calibration with Three Measurements........................................................................................................43
2.1.2 Calibration with Five Measurements ..........................................................................................................45
2.1.3 Fast Calibration ..........................................................................................................................................46
2.2 Calibration Procedures...................................................................................................................................47
2.2.1 General Precautions...................................................................................................................................47
2.2.2 Calibration Procedure with Three Measurements ......................................................................................48
2.2.3 Calibration Procedure with Five Measurements.........................................................................................48
2.2.4 Procedure for Auto-Calibration...................................................................................................................49
2.2.5 Calibration Spreadsheets ...........................................................................................................................49

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2.2.6 Compensating for Non-Linearities..............................................................................................................51
2.2.7 Calibrating Meters with Combined CT and Shunt Resistor ........................................................................51
2.3 Calibrating and Compensating the RTC........................................................................................................54
2.4 Testing the Demo Board.................................................................................................................................55
2.4.1 Functional Meter Test.................................................................................................................................55
2.4.2 EEPROM....................................................................................................................................................56
2.4.3 RTC............................................................................................................................................................57
2.4.4 Hardware Watchdog Timer ........................................................................................................................57
2.4.5 LCD............................................................................................................................................................57
2.4.6 Supply Current Measurements...................................................................................................................58
2.5 TERIDIAN Application Notes..........................................................................................................................58
3HARDWARE DESCRIPTION............................................................................................................................59
3.1 Demo Board Description: Jumpers, Switches, Test Points and Connectors ............................................59
3.2 Demo Board Hardware Specifications...........................................................................................................63
4APPENDIX........................................................................................................................................................65
4.1 71M6531N12A2 Demo Board Electrical Schematic ......................................................................................66
4.2 71M6531N12A2 Demo Board Bill of Material.................................................................................................69
4.3 71M6531N12A2 Demo Board PCB Layout.....................................................................................................70
4.4 Debug Board Bill of Material ..........................................................................................................................75
4.5 Debug Board Schematics...............................................................................................................................76
4.6 Debug Board PCB Layout...............................................................................................................................77
4.7 TERIDIAN 71M6531 Pin-Out Information.......................................................................................................80
4.8 Revision History..............................................................................................................................................83
List of Figures
Figure 1-1: Demo Board: Basic Connections ...............................................................................................................10
Figure 1-2: Demo Board: Ribbon Cable Connections ..................................................................................................11
Figure 1-3: The TERIDIAN 6531 Demo Board with Debug Board Block Diagram (CT Configuration) ......................... 12
Figure 1-4: Port Configuration Setup............................................................................................................................ 14
Figure 1-5: Hyperterminal Sample Window with Disconnect Button ............................................................................15
Figure 1-6: Pre-wired shunt resistor .............................................................................................................................28
Figure 1-7: Connection of the Pre-Wired Shunt Resistor .............................................................................................29
Figure 1-8: Typical Calibration Macro file.....................................................................................................................31
Figure 1-9: Emulator Window Showing Reset and Erase Buttons ............................................................................... 32
Figure 1-10: Emulator Window Showing Erased Flash Memory and File Load Menu.................................................. 32
Figure 2-1: Watt Meter with Gain and Phase Errors.................................................................................................... 43
Figure 2-2: Phase Angle Definitions.............................................................................................................................47
Figure 2-3: Calibration Spreadsheet for Three Measurements ....................................................................................49
Figure 2-4: Calibration Spreadsheet for Five Measurements .......................................................................................50
Figure 2-5: Calibration Spreadsheet for Fast Calibration .............................................................................................50
Figure 2-6: Non-Linearity Caused by Quantification Noise ..........................................................................................51
Figure 2-7: 71M6531 with Shunt and CT .....................................................................................................................52
Figure 2-17: Meter with Calibration System .................................................................................................................56
Figure 2-18: Calibration System Screen ......................................................................................................................56
Figure 3-1: 71M6531N12A2 Board Connectors, Jumpers, Switches, and Test Points ................................................ 62
Figure 4-1: 71M6531N12A2 Demo Board (REV 2.0): Electrical Schematic 1/3 – Shunt Configuration ....................... 66
Figure 4-2: 71M6531N12A2 Demo Board (REV 2.0): Electrical Schematic 2/3 – CT Configuration ............................ 67
Figure 4-3: 71M6531N12A2 Demo Board (REV 2.0): Electrical Schematic 3/3 – Digital Section ................................68
Figure 4-4: 71M6531N12A2 Demo Board: Top Silk Screen.........................................................................................70

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Figure 4-5: 71M6531N12A2 Demo Board: Top Copper Layer .....................................................................................71
Figure 4-6: 71M6531N12A2 Demo Board: Bottom View with Silk Screen ...................................................................72
Figure 4-7: 71M6531N12A2 Demo Board: Bottom Copper Layer – Bottom View........................................................73
Figure 4-8: 71M6531N12A2 Demo Board: Bottom Copper Layer – Layer View from Top ...........................................74
Figure 4-9: Debug Board: Electrical Schematic ........................................................................................................... 76
Figure 4-10: Debug Board: Top View...........................................................................................................................77
Figure 4-11: Debug Board: Bottom View......................................................................................................................77
Figure 4-12: Debug Board: Top Signal Layer...............................................................................................................78
Figure 4-13: Debug Board: Middle Layer 1, Ground Plane ..........................................................................................78
Figure 4-14: Debug Board: Middle Layer 2, Supply Plane ...........................................................................................79
Figure 4-15: Debug Board: Bottom Trace Layer ..........................................................................................................79
Figure 4-16: TERIDIAN 71M6531 LQFP64: Pinout (top view) .....................................................................................82
List of Tables
Table 1-1: Jumper settings on Debug Board................................................................................................................13
Table 1-2: Straight cable connections ..........................................................................................................................13
Table 1-3: Null-modem cable connections ...................................................................................................................13
Table 1-4: COM Port Setup Parameters ......................................................................................................................14
Table 1-5: Selectable Display Options .........................................................................................................................16
Table 1-6: Fields of a Hex Record................................................................................................................................22
Table 1-7: Data (command) types................................................................................................................................23
Table 1-8: Hex Record examples.................................................................................................................................23
Table 1-9: Pre-assembled hex records ........................................................................................................................24
Table 1-10: XRAM Locations for Calibration Constants ...............................................................................................30
Table 1-11: Flash Programming Interface Signals .......................................................................................................33
Table 1-12: MPU memory locations .............................................................................................................................38
Table 1-13: Values for Pulse Source Registers............................................................................................................39
Table 1-14: STATUS register.........................................................................................................................................40
Table 1-15: MPU Accumulation Output Variables........................................................................................................41
Table 2-1: Calibration Summary...................................................................................................................................54
Table 3-1: 71M6531 Demo Board description: 1/3.......................................................................................................59
Table 3-2: 71M6531 Demo Board description: 2/3.......................................................................................................60
Table 3-3: 71M6531 Demo Board description: 3/3.......................................................................................................61
Table 4-1: 71M6531N12A2 Demo Board: Bill of Material (Shunt Version)...................................................................69
Table 4-2: Debug Board: Bill of Material ......................................................................................................................75
Table 4-3: 71M6531 Pin description 1/2.......................................................................................................................80
Table 4-4: 71M6531 Pin description 2/2.......................................................................................................................82

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1 GETTING STARTED
1.1 GENERAL
The TERIDIAN Semiconductor Corporation (TSC) 71M6531 Demo Board is an energy meter IC demonstra-
tion board for evaluating the 71M6531D/F device for residential electronic energy metering applications. It
incorporates a 71M6531D/F integrated circuit, peripheral circuitry such as a serial EEPROM, emulator port,
and on-board power supply as well as a companion Debug Board that allows a connection to a PC through
a RS232 port. The Demo Board allows the evaluation of the 71M6531D/F energy meter controller chip for
measurement accuracy and overall system use.
The board is pre-programmed with a Demo Program (file name 6531_demo.hex) in the FLASH memory of
the 71M6531D/F IC. This embedded application is developed to exercise all low-level functions to directly
manage the peripherals and CPU (clock, timing, power savings, etc.).
1.2 SAFETY AND ESD NOTES
Connecting live voltages to the Demo Board system will result in potentially hazardous voltages on the
Demo Board.
EXTREME CAUTION SHOULD BE TAKEN WHEN HANDLING THE DEMO BOARD
ONCE IT IS CONNECTED TO LIVE VOLTAGES!
THE DEMO SYSTEM IS ESD SENSITIVE! ESD PRECAUTIONS SHOULD BE
TAKEN WHEN HANDLING THE DEMO BOARD!
1
1.3 DEMO KIT CONTENTS
•71M6531 Demo Board containing 71M6531D/F IC with preloaded Demo Program and prepared for
either CT or shunt resistor operation
•Debug Board
•Shunt resistor with wire harness, 400µΩ(for kits shipped in shunt configuration)
•Two 5VDC/1,000mA universal wall transformers w/ 2.5mm plug (Switchcraft 712A)
•Serial cable, DB9, Male/Female, 2m length (Digi-Key AE1379-ND)
•CD-ROM containing documentation (data sheet, board schematics, BOM, layout), Demo Code, and
utilities
Note: The CD-ROM contains a file named readme.txt that specifies all files found on the media and their
purpose.

71M6531 Demo Board User’s Manual
1.4 COMPATIBILITY
This manual applies to the following hardware and software revisions:
•71M6531D/F, chip revision A03
•Demo Boards D6531N12A2
•Demo Board Code revision 6531_4p6q_12may08_0cc.hex, 6531_4p6q_12may08_0sc.hex (EQU 0) ,
6531_4p6q_12may08_1cc.hex EQU 1), 6531_4p6q_12may08_2cc.hex (EQU 2), or later
1.5 SUGGESTED EQUIPMENT NOT INCLUDED
For functional demonstration:
•PC w/ MS-Windows®versions XP, ME, or 2000, equipped with RS232 port (COM port) via DB9
connector
•One or two current transformers (CTs), preferably 2,000:1 turns ratio
•For software development (MPU code):
•Signum ICE (In Circuit Emulator): ADM-51
•http://www.signum.com
•Keil 8051 “C” Compiler kit: CA51
http://www.keil.com/c51/ca51kit.htm, http://www.keil.com/product/sales.htm
1.6 DEMO BOARD TEST SETUP
Figure 1-1 shows the basic connections of the Demo Boards plus Debug Boards with the external
equipment.
Spacer
removed
5VDC Power
Debug
Board
Demo
Board
5VDC Power
Host PC
Figure 1-1: Demo Board: Basic Connections
The Debug Board can be plugged into J2 of the Demo Board. One spacer of the Debug Board should be
removed, as shown in Figure 1-1. Alternatively, both boards can be connected using a flat ribbon cable, as
shown in Figure 1-2. A male header has to be soldered to J3 of the Debug Board, and the female-to-female
flat ribbon cable is not supplied with the Demo Kit (use Digi-Key P/N A3AKA-1606M-ND or similar).
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5VDC Power
Ribbon Cable5VDC Power
Debug Board
Demo
Board
Host PC
Figure 1-2: Demo Board: Ribbon Cable Connections
The 71M6531 Demo Board block diagram is shown in Figure 1-3. It consists of a stand-alone meter Demo
Board and an optional Debug Board. The Demo Board contains all circuits necessary for operation as a
meter, including display, calibration LED, and power supply. The Debug Board, when not sharing a power
supply with the meter, is optically isolated from the meter and interfaces to a PC through a 9 pin serial port.
Connections to the external signals to be measured, i.e. scaled AC voltages and current signals derived
from shunt resistors or current transformers, are provided on the rear side of the Demo Board.
It is recommended to set up the Demo Board with no live AC voltage connected, and to
connect live AC voltages only after the user is familiar with the demo system.

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Figure 1-3: The TERIDIAN 6531 Demo Board with Debug Board Block Diagram (CT Configuration)
Note: All analog input signals are referenced to the V3P3A net (3.3V power supply to the chip).
1.6.1 POWER SUPPLY SETUP
There are several choices for meter the power supply:
•Internal (using the AC line voltage). The internal power supply is only suitable when the line voltage
exceeds 220V RMS.
•External 5VDC connector (J1) on the Demo Board
•External 5VDC connector (J1) on the Debug Board.
The power supply jumper, JP1, must be consistent with the power supply choice. JP1 connects the AC
line voltage to the internal power supply. This jumper should usually be left in place.
When the Demo Board is in shunt configuration, the shunt resistor has to be connected as shown in
Figure 1-7 for the board to be powered via J1. Alternatively, a jumper cable between any header labeled
V3P3 and the NEUTRAL terminal (J9) can be supplied.
DEMONSTRATION METER
IA
NEUTRAL
IA
V3P3
VA
3.3V
VA
GND
V3P3
GND
JP1
5V DC
EEPROM
V3P3
V3P3
ICE Connector
ISO
Wh
VARh
TX
RX
5V DC
V5_DBG
GND_DBG
V5_DBG
V5_DBG
RS-232
INTERFACE
DB9
to PC
COM Port
GND_DBG
V5_DBG
FPGA
4/12/2007
V5_NI
CE HEARTBEAT (1Hz)
MPU HEARTBEAT (5Hz)
DEBUG BOARD (OPTIONAL)
6531
Single Chip
Meter
TMUXOUT
CKTEST
3.3V LCD DISPLAY
DIO6
DIO7
DIO4
DIO5
RTM INTERFACE
LOAD A
IB
LOAD B
VB
IB
JP21
External Current
Transformers
J2
GND
N/C
N/C
4
15, 16
13, 14
6
6
8
12
10
V3P3D
N/C
3
1
2
5, 7,
9, 11
DB9
to PC
COM Port
On-board
components
powered by V3P3D
VB
ISO
ISO
ISO
ISO
ISO
ISO

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1.6.2 CABLE FOR SERIAL CONNECTION
For connection of the DB9 serial port to a PC, either a straight or a so-called “null-modem” cable may be
used. JP1 and JP2 are plugged in for the straight cable, and JP3/JP4 are empty. The jumper configuration is
reversed for the null-modem cable, as shown in Table 1-3.
Cable
Configuration Mode Jumpers on Debug Board
JP1 JP2 JP3 JP4
Straight Cable Default Installed Installed -- --
Null-Modem Cable Alternative -- -- Installed Installed
Table 1-1: Jumper settings on Debug Board
JP1 through JP4 can also be used to alter the connection when the PC is not configured as a DCE device.
Table 1-2 shows the connections necessary for the straight DB9 cable and the pin definitions.
PC Pin Function Demo Board Pin
2 TX 2
3 RX 3
5 Signal Ground 5
Table 1-2: Straight cable connections
Table 1-3 shows the connections necessary for the null-modem DB9 cable and the pin definitions.
PC Pin Function Demo Board Pin
2 TX 3
3 RX 2
5 Signal Ground 5
Table 1-3: Null-modem cable connections
1.6.3 CHECKING OPERATION
A few seconds after power up, the LCD display on the Demo Board should briefly display the following
welcome text:
H E L L 0
After the “HELLO” text, the LCD should display the following information:
W h
and:
0. 0 0 1
The text “Wh” indicates that accumulated Watt-hours are displayed. In the case shown above, 0.001 Wh
were accumulated. The display will be cycling from numeric to text, indicating activity of the MPU inside the
D/F.71M6531
In Mission Mode, the display can be cycled to display VARh, PF and other parameters by pressing
the pushbutton (PB).

71M6531 Demo Board User’s Manual
1.6.4 SERIAL CONNECTION SETUP FOR THE PC
After connecting the DB9 serial port to a PC, start the HyperTerminal application (or any other suitable
communication program) and create a session using the communication parameters shown in Table 1-4.
Setup Paramete
r
V
alue
Port speed (baud) 9600/300g
Data bits 8
Parity none
Stop bits 1
Flow control XON/XOFF
gdepending on the jumper
setting at JP12
Table 1-4: COM Port Setup Parameters
HyperTerminal can be found by selecting Programs ÆAccessories ÆCommunications from the Windows©
start menu. The connection parameters are configured by selecting File ÆProperties and then by pressing
the Configure button (see Figure 1-4).
A setup file (file name “Demo Board Connection.ht”) for HyperTerminal that can be loaded with File ÆOpen
is also provided with the tools and utilities on the supplied CD-ROM.
Figure 1-4: Port Configuration Setup
Note: Port parameters can only be adjusted when the connection is not active. The disconnect button, as
shown in Figure 1-5 must be clicked in order to disconnect the port.
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Figure 1-5: Hyperterminal Sample Window with Disconnect Button
1.7 USING THE DEMO BOARD
The 71M6531 Demo Board is a ready-to-use meter prepared for use with an external shunt resistor.
Using the Demo Board involves communicating with the Demo Code. An interactive command line interface
(CLI) is available as part of the Demo Code. The CLI allows modifications to the metering parameters,
access to the EEPROM, initiation of auto-calibration sequences, selection of the displayed parameters,
changing calibration factors and many more operations.
Before evaluating the 71M6531 Demo Board, users should get familiar with the commands and responses
of the CLI. A complete description of the CLI is provided in section 1.7.2.
1.7.1 CYCLING THE LCD DISPLAY
The Demo Codes for the 71M6531 Demo Board allow cycling of the display using the PB button. By briefly
pressing the button, the next available parameter from Table 1-5 is selected. This makes it easy to navigate
various displays for Demo Boards that do not have the CLI.

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Step Text Display Displayed Paramete
r
1 Wh Accumulated real energy [Wh]. The default display setting after power-up
or reset.
2 VARh Accumulated reactive energy [VARh].
3 Hours Expired hours after power-up or reset
4 Time Time of day (hh.mm.ss).
5 Date Date (yyyy.mm.dd).
6 PF Current power factor.
7 Ed
g
es Count of zero crossings in the last accumulation interval.
8 Pulses Number of emitted pulses.
8 A RMS current at phase A input [A].
8 V RMS voltage at the VA_IN input [V].
8 Bat V Measured battery voltage [V].
8 Delta T Temperature difference from calibration temperature. Displayed in 0.1°C
Table 1-5: Selectable Display Options
1.7.2 SERIAL COMMAND LINE INTERFACE (CLI)
Once, communication to the Demo Board is established, press <CR> and the Demo Program prompt (“>”)
should appear. Type >i to verify that the Demo Program version is revision 4p6q or later.
Users should familiarize themselves with the Demo Program commands described in the tables below.
The Demo Program (Demo Code) is compiled with EEPROM specified as the non-volatile memory. This
means that the default calibration factors are stored in flash memory while the calibration factors resulting
from an actual calibration are stored in EEPROM.
The tables below describe the commands in detail. Type ‘?’ for a display of available commands.

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Commands for CE Data Access:
] CE DATA ACCESS Remarks
Description: Allows user to read from and write to CE data space.
Usage: ] [Starting CE Data Address] [option]…[option]
Command
combinations:
]??? Read consecutive 16-bit words in Decimal
]$$$ Read consecutive 16-bit words in Hex
]U Update . E0)
default version of CE Data in EEPROM
Important: The CE must be stopped (C
before issuing this command!
Example: ]40$$$ Reads s 0x40, 0x41 and 0x42.CE data word
]7E=12345678=9876ABCD Writes two words starting @ 0x7E
CE da from rds are in 4-byte (32-
Commands for MPU/XDATA Access:
ta space is the address range 0x1000 to 0x13FF. All CE data wo
bit) format. The offset of 0x1000 does not have to be entered when using the ] command, thus
typing ]A? will access the 32-bit word located at the byte address 0x1000 + 4 * A = 0x1028.
) MPU DATA ACCESS Remarks
Description: and writeAllows user to read from to MPU data space.
Usage: ) [Starting MPU Data Address] [option]…[option]
Command
c :
e 32-bit words in Decimal
ombinations
)??? Read three consecutiv
)$$$ Read three consecutive 32-bit words in Hex
)a=n=m Write the values n and m to two consecutive
addresses starting at a
Example: )08$$$$ 0x0C, 0x10, 0x14Reads data words 0x08,
)04=12345678=9876ABCD Writes two words starting @ 0x04
MPU o XDATA for th . All MPU data wordsr space is the address range e MPU XRAM (0x0000 to 0x0FFF)
are in 4-byte (32-bit) format. Typing ]A? will access the 32-bit word located at the byte address 4 *
A = 0x28. The energy accumulation registers of the Demo Code can be accessed by typing two
question marks (“??”).

71M6531 Demo Board User’s Manual
Commands for I/O RAM (Configuration RAM) and SFR Control:
R DIO AND SFR CONTROL Remarks
Description: Allows the user to read from and write to I/O RAM and special function registers (SFRs).
Usage: R [option] [register] … [option]
Command
combinations:
RIx… Select I/O RAM location x (0x2000 offset is automati-
cally added)
Rx… Select internal SFR at address x
Rx???... Read consecutive SFR registers in decimal
Rx$$$... Read consecutive registers in hex notation
Example: RI60$$$$ Read all four RTM probe registers
DIO or Configuration RAM space is the address range 0x2000 to 0x20FF. This RAM contains
registers used for configuring basic hardware and functional properties of the 71M6531D/F and is
organized in bytes (8 bits). The 0x2000 offset is automatically added when the command RI is
typed. The SFRs (special function registers) are located in internal RAM of the 80515 core,
starting at address 0x80.
Commands for EEPROM Control:
EE EEPROM CONTROL Remarks
Description: Allows user to enable read and write to EEPROM.
Usage: EE [option] [arguments]
Command
combinations:
EECn EEPROM Access (1 ÆEnable, 0 ÆDisable)
EERa.b Read EEPROM at address 'a' for 'b' bytes.
EEE Erase the EEPROM
EESabc..xyz Write characters to buffer (sets Write length)
EETa Transmit buffer to EEPROM at address 'a'.
EEWa.b...z Write values to buffer
Example: EEShello; EET$0210 Writes 'hello' starting at EEPROM address 0x210.
The EEC1 command must be issued before the EEPROM interface can be used. The execution of the EEE
command takes several seconds. During this time, no other commands can be entered.
Auxiliary Commands:
AUXILIARY Remarks
Description: Various
Commands: , Typing a comma (“,”) repeats the command issued
from the previous command line. This is very helpful
when examining the value at a certain address over
time, such as the XRAM address for the temperature.
/ The slash (“/”) is useful to separate comments from
commands when sending macro text files via the serial
interface. All characters in a line after the slash are
ignored.
? Displays the help menu.
CLC Enables communication via hex records.
BT Commands execution of a battery test.
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Commands controlling the CE:
C COMPUTE ENGINE
CONTROL Remarks
Description: Allows the user to enable and configure the compute engine.
Usage: C [option] [argument]
Command
combinations:
CEn Compute Engine Enable (1 ÆEnable, 0 ÆDisable)
CTn Select input n for TMUX output pin. Enter n in hex
notation.
CREn RTM output control (1 ÆEnable, 0 ÆDisable)
CRSa.b.c.d Selects CE addresses for RTM output (maximum of
four)
Example: CE0 Disables the CE
CT1E Selects the CE_BUSY signal for the TMUX output pin
Calibration Commands:
CL CALIBRATION CONTROL Remarks
Description: Calibration-related commands. A full auto-calibration can be implemented by compiling the
Demo Code with auto-calibration selected as an option. Due to space restrictions, the
auto-calibration is not implemented in the Demo Code supplied with the Demo Boards.
Usage: CL [option]
Command
combinations:
CLC Loads a calibration via serial port
CLB Starts an auto-calibration sequence
CLD Restores calibration to defaults
CLR Restores calibration from EEPROM
CLS Saves calibration to EEPROM
Commands for Identification and Information:
I INFORMATION MESSAGES Remarks
Description: Allows user to display information messages.
Usage: I
Example: I Returns the Demo Code version
The I command is used to identify the revisions of Demo Code and the contained CE code.

71M6531 Demo Board User’s Manual
Commands for Controlling the Metering Values Shown on the LCD Display:
M METER DISPLAY
CONTROL (LCD) Remarks
Description: Allows user to select internal variables to be displayed.
Usage: M [option]. [option]
Command
combinations:
M kWh Total Consumption (display wraps around at 999.999)
M1 Temperature (C° delta from nominal)
M2 Frequency (Hz)
M3. [phase] kWh Total Consumption (display wraps around at 999.999)
M4. [phase] kWh Total Inverse Consumption (display wraps around at
999.999)
M5. [phase] kVARh Total Consumption (display wraps around at 999.999)
M6. [phase] kVAh Total Inverse Consumption (display wraps around at
999.999)
M7. [phase] VAh Total (display wraps around at 999.999)
M9 Real Time Clock
M10 Calendar Date
M13. n Main edge count (n = 0: accumulated, n = 1: last second)
M17 Battery voltage. Display will return to M3 after a few seconds.
Example: M3.1 Displays Wh total consumption of phase A.
Displays for total consumption wrap around at 999.999kWh (or kVARh, kVAh) due to the
number of available display digits. Internal registers (counters) of the Demo Code are 64 bits
wide and do not wrap around.
T
a
r
f
C
he internal accumulators in the Demo Code use 64 bits and will neither overflow nor wrap
round under normal circumstances. The restriction to only six digits is due to the
equirement to provide one digit showing the display mode that is separated by a blank digit
rom the displayed values.
ommands for Controlling the RMS Values Shown on the LCD Display:
MR METER RMS DISPLAY
CONTROL (LCD) Remarks
Description: Allows user to select meter RMS display for voltage or current.
Usage: MR [option]. [option]
Command
combinations:
MR1. [phase] Displays instantaneous RMS current
MR2. [phase] Displays instantaneous RMS voltage
Example: MR1.2 Displays phase b RMS current.
Commands for Controlling the MPU Power Save Mode:
PS POWER SAVE MODE Remarks
Description: Enters power save mode Disables CE, ADC, CKOUT, ECK, RTM, TMUX VREF,
and serial port, sets MPU clock to 38.4KHz.
Usage: PS
Return to normal mode is achieved by issuing a hardware reset.
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