Contents
Section
Page No.
Introduction
1
EV2014 Functional Description
1
EV2014 Contents
2
EV2014 Connections
2
EV2014 Configuration
2
Installing the User Interface Program
3
Using the EV2014 Program
3
Main Menu
3
Monitor Screen
4
Digital Magnitude Filter Menu
6
Data Logging
6
Display Program Menu
7
Measure V
OS
Screen
8
Appendix A: AP14 User's Guide
9
Appendix B: Troubleshooting
10
Appendix C: EV2014 Schematic
11
Introduction
The bq2014 Gas Gauge IC provides battery capacity
monitoring in a single 16-pin SOIC or DIP package. The
EV2014 Evaluation Board provides a useful means to
test bq2014 functionality and easily interface with the
device over the RS-232 port of a PC. The bq2014 fea-
tures:
n
Battery capacity monitoring functions
n
LED display of available charge
n
DQ serial I/O port communications functions
Functional Description
The EV2014 provides functional evaluation of the
bq2014 IC on a PCB. The actual implementation of a
bq2014-based design will be significantly smaller in size.
See the bq2014 data sheet (Dec. 1994 B or later) for
bq2014 specifications.
Power Source
The bq2014 derives its V
CC
from either an external
source or from the battery connected to the BAT+ (J1)
and BAT- (J2) terminal blocks. Refer to Table 4 in
Using
the bq2010-—A Tutorial for Gas Gauging
for the proper
size of R17 as part of the V
CC
regulation. The EV2014
Evaluation Board is shipped with a 200K
Ω
resistor for
R17.
Current Path
The bq2014 uses a sense resistor (R16) on the negative
terminal of the battery to measure charge and discharge
activity. This resistor may be changed if necessary. The
system load is connected between the BAT+ (J1) and
PACK-(J2) terminal blocks (see the schematic in Appen-
dix C).
Parameter Programming
The EV2014 is programmed by the segment program-
ming pins, using jumpers PROG1-PROG6.
The pro-
gramming pins determine:
n
Programmed full count
n
Scale factor
1
EV2014
Gas Gauge Evaluation Board
10/97
Rev. B Board