BQ27500 Datasheet, PDF (18/39 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27500
bq27501
System-Side Impedance Track™ Fuel Gauge
SLUS785 – SEPTEMBER 2007
www.ti.com
Both the sets of keys for each level are 2 bytes each in length and are stored in data flash. The UNSEAL
key (stored at Unseal Key 0 and Unseal Key 1) and the FULL-ACCESS key (stored at Full Access Key
0 and Full Access Key 1) can only be updated when in FULL-ACCESS mode. The order of the bytes
entered through the Control( ) command is the reverse of what is read from the part. For example, if the
1st and 2nd word of Unseal Key 0 read returns 0x1234 and 0x5678, then the Control( ) should supply
0x3412 and 0x7856 to unseal the part.
4.6 DATA FLASH SUMMARY
Table 4-7 summarizes the data flash locations available to the user, including their default, minimum, and
maximum values.
Class
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
System Data
System Data
System Data
Subclass
ID
2
2
2
2
2
2
32
32
32
34
34
34
34
36
36
36
36
48
48
48
48
48
Subclass
Safety
Safety
Safety
Safety
Safety
Safety
Charge Inhibit
Config
Charge Inhibit
Config
Charge Inhibit
Config
Charge
Charge
Charge
Charge
Charge
Termination
Charge
Termination
Charge
Termination
Charge
Termination
Data
Data
Data
Data
Data
Table 4-7. Data Flash Summary
Offset
0
2
3
5
7
8
Name
OT Chg
OT Chg Time
OT Chg Recovery
OT Dsg
OT Dsg Time
OT Dsg Recovery
Data
Type
I2
U1
I2
I2
U1
I2
0
Charge Inhibit Temp Low
12
2
Charge Inhibit Temp High
12
4
Temp Hys
12
2
Charging Voltage
I2
4
Delta Temperature
I2
6
Suspend Temperature Low
I2
8
Suspend Temperature High
I2
2
Taper Current
I2
4
Minimum Taper Charge
I2
6
Taper Voltage
I2
8
Current Taper Window
U1
0
SOC1 Set
I2
6
Initial Standby Current
I1
7
Initial Max Load Current
I2
9
CC Threshold
I2
12
Design Capacity
I2
Min
Value
0
0
0
0
0
0
–400
–400
0
0
0
–400
–400
0
0
0
0
0
–256
–32767
100
0
48
Data
39
Device Name
S8
x
49
Discharge
49
Discharge
49
Discharge
0
SOCF Set %
2
SOCF Clear %
4
Max Load RSOC
58
Manufacturer
Info
0–31 Block A [0–31]
58
Manufacturer
Info
32–63 Block B [0–31]
58
Manufacturer
Info
64–95 Block C [0–31]
I1
–1
I1
–1
I1
0
H1
0x00
H1
0x00
H1
0x00
Max
Value
1200
60
1200
1200
60
1200
1200
1200
100
20000
500
1200
1200
1000
1000
1000
60
700
0
0
32767
65535
x
100
100
100
0xff
0xff
0xff
Default
Value
550
2
500
600
2
550
0
450
50
4200
50
–50
550
100
64
100
40
100
–10
–1000
1400
1500
bq27500
or
bq27501
6
8
50
0x00
0x00
0x00
Units
0.1°C
s
0.1°C
0.1°C
s
0.1°C
0.1°C
0.1°C
0.1°C
mV
0.1°C
0.1°C
0.1°C
mA
mAh
mV
s
mAh
mA
mA
mAh
mAh
–
%
%
%
–
–
–
18
GENERAL DESCRIPTION
Submit Documentation Feedback