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BQ27505-J4 Datasheet, PDF (20/38 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge
◁
bq27505-J4
SLVSA40 – DECEMBER 2009
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 keys is
Key 1 followed by Key 0. The order of the bytes entered through the Control( ) command is the reverse of
what is read from the part. For example, if the Key 1 and Key 0 of the Unseal Keys 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.
Table 4-7. Data Flash Summary
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
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Subclass
ID
2
2
2
2
2
2
Subclass
Safety
Safety
Safety
Safety
Safety
Safety
32
Charge Inhibit
Temp Low
32
Charge Inhibit
Temp High
32
Temp Hysteresis
34
Charge
34
Charge
34
Charge
34
Charge
36
Charge
Termination
36
Charge
Termination
36
Charge
Termination
36
Charge
Termination
36
Charge
Termination
36
Charge
Termination
48
Data
48
Data
48
Data
48
Data
48
Data
48
Data
48
Data
49
Discharge
49
Discharge
49
Discharge
49
Discharge
49
Discharge
49
Discharge
49
Discharge
49
Discharge
Offset
Name
0
OT Chg
2
OT Chg Time
3
OT Chg Recovery
5
OT Dsg
7
OT Dsg Time
8
OT Dsg Recovery
0
Charge Inhibit Temp Low
2
Charge Inhibit Temp High
4
Temp Hys
2
Charging Voltage
4
Delta Temp
6
Suspend Low Temp
8
Suspend High Temp
2
Taper Current
4
Minimum Taper Charge
6
Taper Voltage
8
Current Taper Window
11 FC Set %
12 FC Clear %
4
Initial Standby Current
5
Initial Max Load Current
7
CC Threshold
10 Design Capacity
12 SOH Load
14 Default Temp
16 Device name
0
SOC1 Set Threshold
1
SOC1 Clear Threshold
5
SysDown Set Volt Threshold
7
SysDown Set Volt Time
8
SysDown Clear Volt Threshold
15 Final Voltage
17 Def Cell 0 DOD at EOC
19 Def Cell 1 DOD at EOC
Data Type
I2
U1
I2
I2
U1
I2
Min
Value
0
0
0
0
0
0
I2
–400
I2
–400
I2
0
I2
0
I2
0
I2
–400
I2
–400
I2
0
I2
0
I2
0
U1
0
I1
–1
I1
–1
I1
–256
I2
–32,767
I2
100
I2
0
I2
–32,767
I2
0
S8
x
U1
0
U1
0
I2
0
U1
0
I2
0
U2
0
I2
0
I2
0
Max
Value
1200
60
1200
1200
60
1200
1200
1200
100
4600
500
1200
1200
1000
1000
1000
60
100
100
0
0
32,767
65,535
0
1000
x
255
255
4200
60
4200
4200
16384
16384
Default
Value
550
2
500
600
2
550
0
450
50
4200
50
-50
550
100
25
100
40
100
98
–10
–500
900
1000
–400
25 (1)
bq27505-J4
150
175
3150
2
3400
3000
0
0
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
0.01mAh
mV
s
%
%
mA
mA
mAh
mAh
mA
0.1°C
–
mAh
mAh
mV
s
mV
mV
Num
Num
(1) Display as the value EVSW displayed. Data Flash value is different.
20
GENERAL DESCRIPTION
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