8
Operation
8.1
Starting the Program
Operation
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This section details the operation of the bq20z40 EVSW software. Note: the EV2300 driver does not
support Windows Sleep or Hibernate. If communicating with the EV2300 or the EVM is a problem, first
unplug the USB cable, then plug it back in. If the problem persists, check to determine if the EVM is in
Shutdown mode. The bq20z40 can be awakened by momentarily applying a voltage higher than 5.5 V (but
less than 25 V) at Pack+ pin of the EVM.
With the EV2300 and the bq20z40EVM connected to the computer, run bq20z40 EVSW from the Start |
All Programs | Texas Instruments | bq Evaluation Software menu sequence. The SBS Data screen
appears. Data begins to appear once the <Refresh> (single time scan) button is clicked, or when the
<Keep Scanning> check box is checked. To disable the scan feature, deselect <Keep Scanning>.
The continuous scanning period can be set via the |Options| and |Set Scan Interval| menu selections. The
range for this interval is 0 ms to 65535 ms. Only items that are selected for scanning are scanned within
this period.
The bq20z40 EVSW provides a logging function which logs the values that were last scanned by EVSW.
To enable this function, select the
Start Logging
button; this causes the
Keep Scanning
button to be
selected. When logging is
Stopped
, the keep scanning button is still selected and has to be manually
unchecked.
The logging interval are specified under the |Options| menu with the maximum value of 65535 ms. The
Log
interval cannot be smaller than the scan interval because this results in the same value being logged
at least twice.
10
bq20z40EVM-001 SBS 1.1 Impedance Track™Technology
SLUU320C – January 2009 – Revised June 2009
Enabled Battery Management Solution EVM