Texas Instruments INA233EVM User manual

User’s Guide
INA233EVM Rev A User's Guide And Software Tutorial
ABSTRACT
This EVM user's guide describes the characteristics, operation, and use of the INA233EVM evaluation board. It
discusses how to set up and configure the software and hardware, and reviews various aspects of the program
operation. Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous
with the INA233EVM. This EVM user's guide also includes information regarding operating procedures and
input/output connections, an electrical schematic, printed circuit board (PCB) layout drawings, and a parts list for
the EVM.
Figure 1-1. INA233EVM Evaluation Module
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Table of Contents
1 Overview..................................................................................................................................................................................4
1.1 INA233EVM Kit Contents...................................................................................................................................................4
1.2 Related Documentation from Texas Instruments............................................................................................................... 5
2 INA233EVM Hardware............................................................................................................................................................ 5
2.1 Theory of Operation for INA233 Hardware........................................................................................................................ 6
2.2 Signal Definitions of H1 (10-Pin Connector Socket).......................................................................................................... 7
2.2.1 SM-USB-DIG Platform Description..............................................................................................................................8
3 INA233EVM Hardware Setup................................................................................................................................................. 9
3.1 Electrostatic Discharge Warning........................................................................................................................................ 9
3.2 One-Time INA233EVM GUI Software Setup......................................................................................................................9
3.2.1 Hardware Requirements..............................................................................................................................................9
3.2.2 Software Installation.................................................................................................................................................... 9
3.3 Configuration of INA233EVM Jumper Settings................................................................................................................ 10
3.4 Connecting the Hardware.................................................................................................................................................11
3.4.1 System Power Up......................................................................................................................................................12
3.5 INA233EVM Features...................................................................................................................................................... 13
3.5.1 J3: I2C VS Control Setting......................................................................................................................................... 13
3.5.2 J1: I2C Address Hardware Setting (A0).....................................................................................................................13
3.5.3 J2: I2C Address Hardware Setting (A1).....................................................................................................................13
3.5.4 External I2C Lines and Test Points SCL and SDA.....................................................................................................13
3.5.5 IN+/IN– Input Filter (R1, R2, and C1)........................................................................................................................ 13
3.5.6 Shunt Monitor Configuration......................................................................................................................................14
4 INA233EVM Software Overview...........................................................................................................................................15
4.1 Starting the INA233EVM Software...................................................................................................................................15
4.2 Configuring the INA233EVM Software.............................................................................................................................16
4.2.1 I2C Address Selection................................................................................................................................................17
4.2.2 Set the Configuration Register (MFR_ADC_CONFIG)..............................................................................................18
4.2.3 Set Calibration Register (MFR_CALIBRATION)........................................................................................................19
4.2.4 Set the MFR_DEVICE_CONFIG Register.................................................................................................................20
4.2.5 Set the MFR_ALERT_MASK.....................................................................................................................................20
4.2.6 Set the Warning Limit Registers................................................................................................................................ 20
4.3 Using the INA233EVM Software...................................................................................................................................... 21
4.3.1 Read Data Tab...........................................................................................................................................................21
4.3.2 Status Register Tab................................................................................................................................................... 22
4.3.3 Register Map Tab...................................................................................................................................................... 23
4.3.4 Plots Tab....................................................................................................................................................................24
5 INA233EVM Documentation.................................................................................................................................................25
5.1 Schematic........................................................................................................................................................................ 25
5.2 PCB Layout...................................................................................................................................................................... 26
5.3 Bill of Materials.................................................................................................................................................................28
6 Revision History................................................................................................................................................................... 29
List of Figures
Figure 1-1. INA233EVM Evaluation Module................................................................................................................................ 1
Figure 1-1. Hardware Included With INA233EVM Kit.................................................................................................................. 4
Figure 2-1. INA233EVM Hardware Setup....................................................................................................................................5
Figure 2-2. INA233EVM Board Block Diagram............................................................................................................................6
Figure 2-3. SM-USB-DIG Platform Block Diagram...................................................................................................................... 8
Figure 3-1. INA233EVM Software Installation............................................................................................................................. 9
Figure 3-2. INA233EVM Default Jumper Settings..................................................................................................................... 10
Figure 3-3. Connecting the INA233 Test Board and SM-USB-DIG Platform Board to the Computer........................................11
Figure 3-4. Connecting the INA233 Test Board and SM-USB-DIG Platform Board...................................................................11
Figure 3-5. INA233 Power Up Using SM_USB DIG and INA233EVM GUI Software................................................................12
Figure 3-6. VDUT Voltage Selection in INA233EVM GUI..........................................................................................................12
Figure 3-7. INA233 Shunt Configurations..................................................................................................................................14
Figure 4-1. INA233EVM Software Interface.............................................................................................................................. 15
Figure 4-2. INA233EVM Software: Communication Error With the SM-USB-DIG Platform...................................................... 16
Figure 4-3. Setting the I2C Address...........................................................................................................................................17
Figure 4-4. Configuring Averaging Mode...................................................................................................................................18
Figure 4-5. Configuring Conversion Times................................................................................................................................ 18
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Figure 4-6. Configuring Operating Mode................................................................................................................................... 19
Figure 4-7. Setting the Calibration Register (MFR_CALIBRATION)..........................................................................................19
Figure 4-8. Set the MFR_DEVICE_CONFIG Register.............................................................................................................. 20
Figure 4-9. Set the MFR_ALERT_MASK Register.................................................................................................................... 20
Figure 4-10. Set the Warning Limit Registers............................................................................................................................ 20
Figure 4-11. Read Data Tab.......................................................................................................................................................21
Figure 4-12. Status Register Tab...............................................................................................................................................22
Figure 4-13. Registers Map Tab................................................................................................................................................ 23
Figure 4-14. Graphing the INA233 Data.................................................................................................................................... 24
Figure 5-1. INA233EVM Schematic...........................................................................................................................................25
Figure 5-2. INA233EVM PCB Top Overlay................................................................................................................................ 26
Figure 5-3. INA233EVM PCB Top Solder..................................................................................................................................26
Figure 5-4. INA233EVM PCB Top Layer................................................................................................................................... 27
Figure 5-5. INA233EVM PCB Bottom Layer..............................................................................................................................27
List of Tables
Table 1-1. INA233EVM Kit Contents............................................................................................................................................4
Table 1-2. Related Documentation.............................................................................................................................................. 5
Table 2-1. Signal Definition of J4 on INA233EVM Board.............................................................................................................7
Table 3-1. INA233EVM Test Board Jumper Functions.............................................................................................................. 10
Table 4-1. INA233 I2C Address Configuration........................................................................................................................... 17
Table 5-1. Bill of Materials: INA233EVM....................................................................................................................................28
Trademarks
Windows® is a registered trademark of Microsoft.
All trademarks are the property of their respective owners.
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1 Overview
The INA233 is a current shunt and power monitor with an I2C/SMBus/PMBus-compatible interface. The device
monitors and reports values for current, power, and voltage. The integrated power accumulator can be used
for energy or average power calculations. Programmable calibration value, conversion times, and averaging,
combined with an internal multiplier, enable direct readouts of current in amperes and power in watts. The
INA233EVM is a platform for evaluating the performance of the INA233 under various signal, shunt, and supply
conditions.
This document gives a general overview of the INA233EVM, and provides a general description of the features
and functions to be considered while using this evaluation module.
1.1 INA233EVM Kit Contents
Table 1-1 summarizes the contents of the INA233EVM kit. Figure 1-1 shows all of the included hardware.
Contact the Texas Instruments Product Information Center if any component is missing. TI also highly
recommends checking the INA233 product folder on the TI web site at www.ti.com to update to the latest
versions of the related software.
Table 1-1. INA233EVM Kit Contents
Item Quantity
INA233EVM PCB Test Board 1
SM-USB-DIG Platform PCB 1
USB Extender Cable 1
Figure 1-1. Hardware Included With INA233EVM Kit
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1.2 Related Documentation from Texas Instruments
The following documents provide information regarding Texas Instruments integrated circuits used in the
assembly of the INA233EVM. This EVM user's guide is available from the TI web site under literature number
SBOU187. Any letter appended to the literature number corresponds to the document revision that is current at
the time of the writing of this document. Newer revisions can be available from the TI web site. When ordering,
identify the document by both title and literature number.
Table 1-2. Related Documentation
DOCUMENT LITERATURE NUMBER
INA233 Product Data Sheet SBOS790
SM-USB-DIG Platform User
Guide
SBOU098
2 INA233EVM Hardware
Figure 2-1 shows the overall system setup for the INA233EVM. The PC runs software that communicates
with the SM-USB-DIG Platform. The SM-USB-DIG Platform generates the analog and digital signals used to
communicate with the INA233 test board. Connectors on the INA233EVM test board allow the user to connect to
the system under test conditions and monitor the power, current, and voltage.
Desktop or Lab Computer/
Laptop SM-USB-DIG Platform INA233EVM
Shunt
Load
Power
Supply
Figure 2-1. INA233EVM Hardware Setup
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2.1 Theory of Operation for INA233 Hardware
Figure 2-2 depicts a block diagram of the INA233EVM PCB highlighting the power supplies, analog inputs, and
digital I/O signals.
INA233
(DVDD)
I
10-Pin Female
SM-USB-DIG
Connector
J2
J1
J4
Jumpers
A0
A1
IN+ IN- VBUS
DUT
2
2
VSupply
C Interface
I C Address
Figure 2-2. INA233EVM Board Block Diagram
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2.2 Signal Definitions of H1 (10-Pin Connector Socket)
Table 2-1 lists the pinout for the 10-pin connector socket used to communicate between the INA233EVM and the
SM-USB-DIG. It should be noted that the INA233EVM only uses the necessary I2C communication lines (pins 1
and 3) and the VS and GND pins (pin 6 and pin 8) to issue commands to the INA233 chip.
Table 2-1. Signal Definition of J4 on INA233EVM Board
Pin on J4 Signal Description
1 I2C_SCL I2C Clock Signal (SCL)
2 CTRL/MEAS4 GPIO: Control Output or Measure
Input
3 I2C_SDA1 I2C Data Signal (SDA)
4 CTRL/MEAS5 GPIO: Control Output or Measure
Input
5 SPI_DOUT1 SPI Data Output (PICO)
6 VDUT
Switchable DUT Power Supply: +3.3
V, +5 V, Hi-Z (Disconnected)(1)
7 SPI_CLK SPI Clock Signal (SCLK)
8 GND Power Return (GND)
9 SPI_CS1 SPI Chip Select Signal ( CS)
10 SPI_DIN1 SPI Data Input (POCI)
(1) When VDUT is Hi-Z, all digital I/O are Hi-Z as well.
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2.2.1 SM-USB-DIG Platform Description
Figure 2-3 shows the block diagram for the SM-USB-DIG Platform. This platform is a general-purpose data
acquisition system that is used on several different Texas Instruments evaluation modules. The details of its
operation are included in a separate document, SBOU098 (available for download at www.ti.com). The block
diagram shown in Figure 2-3 gives a brief overview of the platform. The primary control device on the SM-USB-
DIG Platform is the TUSB3210. The TUSB3210 is an 8052 microcontroller that has an onboard USB interface.
The microcontroller receives information from the host computer that it interprets into power, I2C, SPI, and other
digital I/O patterns. During the digital I/O transaction, the microcontroller reads the response of any device
connected to the I/O interface. The response from the device is sent back to the PC where it is interpreted by the
host computer.
TUSB3210
8052 mC
with USB Interface
and UART
8Kx8-byte
EEPROM
+3.3 V
V
+5 V
Power-On Reset
SM USB DIG Platform
To Test Board
To Computer and Power Supplies
Power
Switching
Switched
Power
USB Bus
from
Computer
USB Power
+5.0 V
+3.0 V
(H-Z, 3.3 V, or 5 V)
Buffers and
Level Translators
I
Control and
Measure Bits
+3.3 V
Regulator
VDUT
2C/SPI
USB
Figure 2-3. SM-USB-DIG Platform Block Diagram
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3 INA233EVM Hardware Setup
Setting up the INA233EVM involves the following sequence of operations:
• Perform a one-time GUI software installation
• Configure the EVM jumpers
• Connect the hardware
• Power-up the EVM and input source
3.1 Electrostatic Discharge Warning
CAUTION
Many of the components on the INA233EVM are susceptible to damage by electrostatic discharge
(ESD). Customers are advised to observe proper ESD handling precautions when unpacking and
handling the EVM, including the use of a grounded wrist strap at an approved ESD workstation.
3.2 One-Time INA233EVM GUI Software Setup
This section discusses how to install the INA233EVM software.
3.2.1 Hardware Requirements
The INA233EVM software must be installed on a computer running Windows® XP operating system or later.
Windows 7 is the recommended operating system.
3.2.2 Software Installation
Make sure the hardware is not connected to the computer. Download the INA233EVM GUI from the INA233
Tools & Software folder. Extract the contents of the downloaded .zip file and run Setup_INA233EVM.exe. Follow
the on-screen instructions provided in Figure 3-1 to complete the software installation.
Figure 3-1. INA233EVM Software Installation
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3.3 Configuration of INA233EVM Jumper Settings
Figure 3-2 shows the default jumper configuration for the INA233EVM. In general, the jumper settings of the
SM-USB-DIG Platform do not need to be changed. Change the jumpers on the INA233EVM board to match your
specific configuration. For example, set a specific I2C address by configuring J1 and J2.
Figure 3-2. INA233EVM Default Jumper Settings
Typically, jumper 3 (J3) on the INA233EVM is always set to the INT position. When set to the INT position,
the SM-USB-DIG Platform provides the supply for the INA233. When this jumper is set to the EXT position, an
external supply voltage can be connected to test point VS_EXT to provide the supply for the INA233.
Jumper 1 (J1) and jumper 2 (J2) control the I2C address pins for the INA233. These jumpers can set the address
for A0 and A1 to either supply, ground, SCL, or SDA. Make sure to only connect one jumper at a time for each
address control. Failure to properly connect jumpers can cause shorts or interruptions in the communication
lines. For more information on the INA233 addressing, refer to the INA233 product data sheet.
Table 3-1 summarizes the function of the INA233 Test Board jumpers. For most applications, all jumpers must be
left in the respective default configurations.
Table 3-1. INA233EVM Test Board Jumper Functions
Jumper Default Purpose
J3 INT This jumper selects whether the VS pin on the INA233 is connected to the VDUT signal generated from the
SM-USB-DIG Platform or whether the digital supply pin is connected to test point VS_EXT, allowing for an
external supply to power the device. The default INT position connects the VS pin to the VDUT control signal.
J1 GND This jumper selects the I2C A0 address selection for A0.
J2 GND This jumper selects the I2C A1 address selection for A1.
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3.4 Connecting the Hardware
To set up the INA233EVM and connect the two PCBs of the EVM together (that is, the INA233 test board
and SM-USB-DIG Platform board), gently slide the male and female ends of the 10-pin connectors together.
Make sure that the two connectors are completely pushed together; loose connections can cause intermittent
operation. Figure 3-3 show the proper orientation.
Figure 3-3. Connecting the INA233 Test Board and SM-USB-DIG Platform Board to the Computer
Lastly, connect the SM-USB-DIG to the computer, using the included USB extender cable. At this point the
SM-USB-DIG powers on, but the EVM does not as shown in Figure 3-4. The power supply to the EVM must be
enabled from the GUI.
Figure 3-4. Connecting the INA233 Test Board and SM-USB-DIG Platform Board
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3.4.1 System Power Up
Launch the INA233EVM GUI software. By default the Power button on the GUI is enabled so the VS LED on the
EVM (D1) immediately lights up, indicating that the EVM PCB is receiving power, as shown Figure 3-5.
Figure 3-5. INA233 Power Up Using SM_USB DIG and INA233EVM GUI Software
The INA233EVM software allows users to customize the board level voltage, regulated by the SM-USB DIG. By
selecting either 3.3 V or 5 V, the user can designate which voltage the device operates at. The supply voltage
(VDUT) is set to 3.3 V by default, but if necessary, the 5-V option can be selected, as shown in Figure 3-6.
Figure 3-6. VDUT Voltage Selection in INA233EVM GUI
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3.5 INA233EVM Features
This section describes some of the hardware features present on the INA233EVM test board.
3.5.1 J3: I2C VS Control Setting
Jumper J3 selects what the INA233 supply pin is connected to. If J3 is set to the INT position, the VS pin is
connected to the switchable VDUT signal generated from the SM-USB-DIG Platform. This voltage can be set to
either 3.3 V or 5 V, depending on how it is configured in the software. While J2 is set in the INT position, the VS
Power button in the INA233EVM software is able to control whether the VDUT supply voltage is turned on or off.
When J2 is set in the EXT position, an external supply connected to test point VS_EXT can be used to provide
the supply voltage for the INA233.
3.5.2 J1: I2C Address Hardware Setting (A0)
Jumper J1 is used to set the hardware setting for the A0 I2C address pin on the INA233. Using J1, the A0
address can be set to VS, GND, SCL or SDA. See Section 4.2.1 on how to configure the INA233EVM software
to match the J1 hardware setting.
3.5.3 J2: I2C Address Hardware Setting (A1)
Jumper J2 is used to set the hardware setting for the A1 I2C address pin on the INA233. Using J2, the A1
address can be set to VS, GND, SCL or SDA. See Section 4.2.1 on how to configure the INA233EVM software
to match the J2 hardware setting.
3.5.4 External I2C Lines and Test Points SCL and SDA
The I2C communication lines on the INA233EVM are tied to two sources: the internal I2C communication lines
from the SM-USB-DIG and test points SCL and SDA. If the user wants to add external signals separate from
the SM-USB-DIG, simply disconnect the SM-USB-DIG from the INA233EVM board and hook up the necessary
SDA, SCL, and GND lines. Also, remember to apply an external supply to the lines that is compatible with the
I2C communication device being used.
Note
Failure to disconnect the SM-USB-DIG while using external I2C communication can cause damage to
the SM-USB-DIG or any external communication devices that are connected.
3.5.5 IN+/IN– Input Filter (R1, R2, and C1)
The INA233EVM has an optional input filter to remove high-frequency noise from the inputs IN+ and IN–. This
filter is typically unpopulated. The default values for R1 and R2 are 0-Ω resistors.
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3.5.6 Shunt Monitor Configuration
The INA233 is generally used in either a high-side or low-side shunt configuration, as shown in Figure 3-7.
Depending on the user’s needs, either of these configurations can be used without making any changes to the
INA233EVM board or software. The INA233EVM have VBUS, GND, IN+ and IN- test points. Use these test
points to apply external voltage sources depending the configuration selected.
GND
VBUS
V
I
High-Side
Shunt
Low-Side
Shunt
Power Supply
(0 V to 36 V)
VIN+
VIN-
Load
Figure 3-7. INA233 Shunt Configurations
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4 INA233EVM Software Overview
This section discusses how to use the INA233EVM software. Software operation involves a two-step process:
configuration of the INA233 settings, and operation of the tool.
4.1 Starting the INA233EVM Software
The INA233 software can be operated through the Windows Start menu. From Start, select All Programs; then
select the INA233EVM program.
Figure 4-1 illustrates how the software appears if the INA233EVM is functioning properly. The Status Bar reads
"VDUT On" and the Hardware Connected bar is on.
Figure 4-1. INA233EVM Software Interface
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Figure 4-2 shows how the Software Interface looks if the computer cannot communicate with the EVM. The
status bar reads "Check SM-USB-DIG-Connection" and the Hardware Connected light is off. If you receive this
error, first check to see that the USB cable is properly connected on both ends. This error can also occur if you
connect the USB cable before the SM-USB-DIG Platform power source. Another possible source for this error is
a problem with your PC USB Human Interface Device driver. Make sure that the device is recognized when the
USB cable is plugged in; recognition is indicated by a Windows-generated confirmation sound. After verifying all
connections are correct, press Re-Initialize. The software interface then appears as shown in Figure 4-1.
Figure 4-2. INA233EVM Software: Communication Error With the SM-USB-DIG Platform
4.2 Configuring the INA233EVM Software
The INA233EVM software first requires a series of setup processes to configure the device and make sure that
the software works properly.
1. Set I2C Address on the SM-USB-DIG Tab
2. Set Configuration Register on the Device Config Tab
• Set Averaging Mode
• Set Conversion Times
• Set Operating Modes
3. Set Calibration Register on the Device Config Tab
4. Set the MFR_DEVICE_CONFIG Register on the Device Config Tab
5. Set the Warning Limits Registers on the Limit Config Tab
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4.2.1 I2C Address Selection
The INA233 device has a flexible I2C address configuration that allows for multiple devices to be on the same
I2C lines. By moving the A0 and A1 addresses on jumpers J1 and J2 to either GND, VS, SDA, or SCL, the
INA233 can be changed to a total of 16 I2C addresses as shown in Table 4-1.
Table 4-1. INA233 I2C Address Configuration
A1 A0 Slave Address
Corresponding I2C Address in the
GUI
GND GND 1000000 Read: x81
Write: x80
GND VS 1000001 Read: x83
Write: x82
GND SDA 1000010 Read: x85
Write: x84
GND SCL 1000011 Read: x87
Write: x86
VS GND 1000100 Read: x89
Write: x88
VS VS 1000101 Read: x8B
Write: x8A
VS SDA 1000110 Read: x8D
Write: x8C
VS SCL 1000111 Read: x8F
Write: x8E
SDA GND 1001000 Read: x91
Write: x90
SDA VS 1001001 Read: x93
Write: x92
SDA SDA 1001010 Read: x95
Write: x94
SDA SCL 1001011 Read: x97
Write: x96
SCL GND 1001100 Read: x99
Write: x98
SCL VS 1001101 Read: x9B
Write: x9A
SCL SDA 1001110 Read: x9D
Write: x9C
SCL SCL 1001111 Read: x9F
Write: x9E
Figure 4-3 illustrates how to configure the I2C addresses. To configure the I2C address in the GUI navigate to
the SM-USB-DIG tab. Click on the Read I2C Address and Write I2C Address to input the I2C address configured
on the INA233EVM hardware. Refer to Table 4-1 to make sure you assign the correct values.
Figure 4-3. Setting the I2C Address
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4.2.2 Set the Configuration Register (MFR_ADC_CONFIG)
The Configuration Register settings control the operating modes for the device. This register controls the
conversion time settings for both the shunt and bus voltage measurements as well as the averaging mode
used. The operating mode that controls what signals are selected to be measured is also programmed in
the Configuration Register. The Device Configuration tab of the INA233EVM GUI allows the user to set the
averaging mode (AVG[2:0]), Vbus conversion time (VBUSCT[2:0]), Vshunt conversion time(VSHCT[2:0]) and
operating mode (MODE[2:0]).
4.2.2.1 Set Averaging Mode
The Device Configuration tab contains a drop down box for selecting the Averaging Mode, as shown in Figure
4-4. The averaging mode selected determines the number of samples that are collected and averaged before
storing the value of the measurements in the register table.
Figure 4-4. Configuring Averaging Mode
4.2.2.2 Set Conversion Times
Setting the conversion times allows the user to customize the amount of measurement time for conversions.
Typically, for the INA233EVM software, the user is not able to notice a visual difference between the conversion
times unless a high averaging mode and conversion time are chosen. The Shunt and Bus conversion times can
be set as shown in Figure 4-5.
Figure 4-5. Configuring Conversion Times
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4.2.2.3 Set Operating Mode
The Device Configuration tab contains a drop down box for selecting the Operating Mode, as shown in Figure
4-6.The Operating mode allows the user to restrict the amount of calculations done within the INA233 by
changing the conversion to be triggered or continuous, or shutting down the part altogether. The Device
Configuration tab of the INA233EVM GUI allows the user to set the averaging mode (AVG[2:0]), Vbus
conversion time (VBUSCT[2:0]), Vshunt conversion time(VSHCT[2:0]) and operating mode (MODE[2:0]).
It is important to note that for complete functionality of the INA233, a configuration must be chosen with Shunt
and Bus configuration. Failure to choose Shunt and Bus configuration disables a considerable portion of the unit
functionality as discussed in the INA233 data sheet.
Figure 4-6. Configuring Operating Mode
4.2.3 Set Calibration Register (MFR_CALIBRATION)
The Calibration Register must then be set correctly for the software to operate properly. The user needs to
manually calculate the desired value using Equation 1 and then input that value into the MFR_Calibration box,
as shown in Figure 4-7. After this, the user must press W in order to write into the Calibration Register. If inputs
were correct the MFR_CALIBRATION and MFR_CALIBRATION Hex boxes should display the same values after
pressing R (Pressing R reads the Calibration Register).
CalibrationRegister =  0.00512
Current_LSB × RSHUNT (1)
The current LSB is calculated by a recommended range in the INA233 data sheet as shown in Equation 2. It
is important to note that the Current LSB and the Calibration Register values are calculated based on the other
variable and the RSHUNT value. See the section, Programming the INA233 in the product data sheet for more
information on setting the Calibration Register value.
MaximumExpectedCurrent
215 ≤Current_LSB ≤MaximumExpectedCurrent
212 (2)
Figure 4-7. Setting the Calibration Register (MFR_CALIBRATION)
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4.2.4 Set the MFR_DEVICE_CONFIG Register
This register configures various behaviors of the device in regards to data communications and alerts. The
user is able to write and read these registers in the Device Configuration Tab as shown in Figure 4-8. Refer to
MFR_DEVICE_CONFIG Register section on the data sheet for register details.
Figure 4-8. Set the MFR_DEVICE_CONFIG Register
4.2.5 Set the MFR_ALERT_MASK
The bits in this register correspond to the bits in the STATUS_MFR_SPECIFIC register. Setting a bit in this
register will block the corresponding bit in the STATUS_MFR_SPECIFIC register from having an effect on the
ALERT pin. The user is able to write and read these registers in the Device Configuration Tab as shown in
Figure 4-9. Refer to MFR_ALERT_MASK Register table in the data sheet for register bits details.
Figure 4-9. Set the MFR_ALERT_MASK Register
4.2.6 Set the Warning Limit Registers
The Limit configuration tab allows the user to set the values for the following warning limit registers:
• OUT_OC_WARN_LIMIT Register
• VIN_OV_WARN_LIMIT Register
• VIN_UV_WARN_LIMIT Register
• POUT_OP_WARN_LIMIT Register
The user is able to write and read these registers in the Device Configuration Tab as shown in Figure 4-10. Refer
to data sheet Standard PMBus Commands section for register descriptions.
Figure 4-10. Set the Warning Limit Registers
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