BQ27500-V120 Datasheet, PDF (18/36 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27500-V120
System-Side Impedance Track™ Fuel Gauge
SLUS880 – OCTOBER 2008
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 Key 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
Configuration
Subclass
ID
2
2
2
2
2
2
Subclass
Safety
Safety
Safety
Safety
Safety
Safety
32
Charge Inhibit
Config
32
Charge Inhibit
Config
32
Charge Inhibit
Config
34
Charge
34
Charge
34
Charge
34
Charge
36
Charge
Termination
36
Charge
Termination
36
Charge
Termination
36
Charge
Termination
48
Data
48
Data
48
Data
48
Data
48
Data
49
Discharge
49
Discharge
49
Discharge
49
Discharge
57
Manufacturer
Info
57
Manufacturer
Info
57
Manufacturer
Info
64
Registers
Table 4-7. Data Flash Summary
Offset
Name
0
OT Chg
2
OT Chg Time
3
OT Chg Recovery
5
OT Dsg
7
OT Dsg Time
8
OT Dsg Recovery
Data
Type
I2
U1
I2
I2
U1
I2
0
Charge Inhibit Temp Low
I2
2
Charge Inhibit Temp High
I2
4
Temp Hys
I2
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
4
Initial Standby Current
I1
5
Initial Max Load Current
I2
7
CC Threshold
I2
10 Design Capacity
I2
12 Device Name
S8
0
SOC1 Set Threshold
U1
1
SOC1 Clear Threshold
U1
2
SOCF Set Threshold
U1
3
SOCF Clear Threshold
U1
0–31 Block A [0–31]
H1
32–63 Block B [0–31]
H1
64–95 Block C [0–31]
H1
0
Operation Configuration
H2
Min
Value
0
0
0
0
0
0
–400
–400
0
0
0
–400
–400
0
0
0
0
–128
–32,767
100
0
x
0
0
0
0
0x00
0x00
0x00
0x0000
Max
Value
1200
60
1200
1200
60
1200
1200
1200
100
20,000
500
1200
1200
1000
1000
1000
60
0
0
32,767
65,535
x
255
255
255
255
0xff
0xff
0xff
0xffff
Default
Value
550
2
500
600
2
550
Units
0.1°C
s
0.1°C
0.1°C
s
0.1°C
0
0.1°C
450
0.1°C
50
0.1°C
4200
50
-50
550
mV
0.1°C
0.1°C
0.1°C
100
mA
25
0.01mAh
100
mV
40
s
–10
–500
900
1000
bq27500
150
175
75
100
mA
mA
mAh
mAh
–
mAh
mAh
mAh
mAh
0x00
–
0x00
–
0x00
–
0x0979
–
18
GENERAL DESCRIPTION
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