BQ26231_15 Datasheet, PDF (8/23 Pages) Texas Instruments – EMBEDDED PORTABLE APPLICATIONS

bq26231
Not Recommended for New Designs
SLUS491 – JULY 2001
APPLICATION INFORMATION
charge and discharge count operation (continued)
Figure 3 shows the bq26231 register address map. The bq26231 uses the upper 13 locations. The remaining
memory can store user-specific information such as chemistry, serial number, and manufacturing date.
7F
7F Discharge Count High Byte
7E Discharge Count Low Byte
7D Charge Count High Byte
7C Charge Count Low Byte
7B Self-Discharge High Byte
73
7A Self-Discharge Low Byte
79 Discharge Time High Byte
78 Discharge Time Low Byte
77 Charge Time High Byte
76 Charge Time Low Byte
75 Mode / WOE
74 Temperature / Clear
73 Offset Register
Figure 3. bq26231 Register Map
temperature
The bq26231 has an internal temperature sensor to set the value in the temperature register (TMP/CLR) and
to set the self-discharge count rate value. The register reports the temperature in 8 steps of 10°C from < 0°C
to > 60°C as Table 3 specifies. The bq26231 temperature sensor has typical accuracy of ±2°C at 25°C. See the
TMP/CLR register description for more details.
Table 3. Temperature Steps
TEMPERATURE
< 0°C
0–10°C
10–20°C
20–30°C
30–40°C
40–50°C
50–60°C
>60°C
VALUE (hex)
0h
1h
2h
3h
4h
5h
6h
7h
SDR COUNT RATE
× 1/8
× 1/4
× 1/2
1 count/hr
×2
×c4
×8
× 16
8
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