Texas Instruments BQ27421EVM-G1B System-Side Battery Fuel (Gas) Gauge Evaluation Module BQ27421EVM-G1B BQ27421EVM-G1B Datenbogen
Produktcode
BQ27421EVM-G1B
LOAD
CHARGER
EV2300 or EV2400
USB
H
D
Q
I2
C
S
M
B
Battery
Pack
Operation
Figure 7. bq27421 Circuit Module Connection to Pack and System Load/Charger
6.2
PC Interface Connection
The following steps configure the hardware for interface to the PC.
1. Connect the bq27421-based EVM to the EV2300 or EV2400 using wire leads as shown in
2. Connect the PC USB cable to the EV2300 or EV2400 and the PC USB port.
Table 4. Circuit Module to EV2300 or EV2400 Connections
bq27421EVM
EV2300 or EV2400
SDA
SDA
SCL
SCL
VSS
GND/VSS
The bq27421EVM is now set up for operation.
7
Operation
This section details the operation of the bq27421 GaugeStudio software.
7.1
Starting the Program
Run GaugeStudio from the Start
→
Programs
→
Texas Instruments
→
GaugeStudio menu sequence. The
main GaugeStudio window (
) appears. The window consists of a tools panel at the top, and other
child windows that can be hidden, docked in various positions or allowed to float as separate windows.
When GaugeStudio first starts up the Gauge Dashboard window, the Registers window and Data Memory
window should be seen in the main window. Registers, Data Memory, Commands, and other windows can
be added to the main window by clicking on the corresponding icon in the tools panel at the top of the
main window. Data should appear initially in the Gauge Dashboard, Registers and Data Memory sections.
The Refresh (single time scan) or the Scan (continuous scan) buttons can be clicked in order to update
the data in the Registers and Data Memory windows. The continuous scan is enabled when the Scan
checkbox is highlighted green and disabled when the Scan checkbox is not highlighted.
When GaugeStudio first starts up the Gauge Dashboard window, the Registers window and Data Memory
window should be seen in the main window. Registers, Data Memory, Commands, and other windows can
be added to the main window by clicking on the corresponding icon in the tools panel at the top of the
main window. Data should appear initially in the Gauge Dashboard, Registers and Data Memory sections.
The Refresh (single time scan) or the Scan (continuous scan) buttons can be clicked in order to update
the data in the Registers and Data Memory windows. The continuous scan is enabled when the Scan
checkbox is highlighted green and disabled when the Scan checkbox is not highlighted.
The continuous scanning interval can be set with the stopwatch icon next to the Scan button. When the
stopwatch icon is clicked, a drop-down menu will appear and the desired scanning interval can be
selected. The scan interval value will show up next to the stopwatch icon.
stopwatch icon is clicked, a drop-down menu will appear and the desired scanning interval can be
selected. The scan interval value will show up next to the stopwatch icon.
9
SLUUA63 – April 2013
bq27421 EVM: Single-Cell Impedance Track Technology
Copyright © 2013, Texas Instruments Incorporated