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4.6 DATA FLASH SUMMARY
bq27500
bq27501
System-Side Impedance Track™ Fuel Gauge
SLUS785 – SEPTEMBER 2007
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.
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
Subclass
Data
Min
Max
Default
Class
Subclass
Offset
Name
Units
ID
Type
Value
Value
Value
Configuration
2
Safety
0
OT Chg
I2
0
1200
550
0.1
°
C
Configuration
2
Safety
2
OT Chg Time
U1
0
60
2
s
Configuration
2
Safety
3
OT Chg Recovery
I2
0
1200
500
0.1
°
C
Configuration
2
Safety
5
OT Dsg
I2
0
1200
600
0.1
°
C
Configuration
2
Safety
7
OT Dsg Time
U1
0
60
2
s
Configuration
2
Safety
8
OT Dsg Recovery
I2
0
1200
550
0.1
°
C
Charge Inhibit
Configuration
32
0
Charge Inhibit Temp Low
12
–400
1200
0
0.1
°
C
Config
Charge Inhibit
Configuration
32
2
Charge Inhibit Temp High
12
–400
1200
450
0.1
°
C
Config
Charge Inhibit
Configuration
32
4
Temp Hys
12
0
100
50
0.1
°
C
Config
Configuration
34
Charge
2
Charging Voltage
I2
0
20000
4200
mV
Configuration
34
Charge
4
Delta Temperature
I2
0
500
50
0.1
°
C
Configuration
34
Charge
6
Suspend Temperature Low
I2
–400
1200
–50
0.1
°
C
Configuration
34
Charge
8
Suspend Temperature High
I2
–400
1200
550
0.1
°
C
Charge
Configuration
36
2
Taper Current
I2
0
1000
100
mA
Termination
Charge
Configuration
36
4
Minimum Taper Charge
I2
0
1000
64
mAh
Termination
Charge
Configuration
36
6
Taper Voltage
I2
0
1000
100
mV
Termination
Charge
Configuration
36
8
Current Taper Window
U1
0
60
40
s
Termination
Configuration
48
Data
0
SOC1 Set
I2
0
700
100
mAh
Configuration
48
Data
6
Initial Standby Current
I1
–256
0
–10
mA
Configuration
48
Data
7
Initial Max Load Current
I2
–32767
0
–1000
mA
Configuration
48
Data
9
CC Threshold
I2
100
32767
1400
mAh
Configuration
48
Data
12
Design Capacity
I2
0
65535
1500
mAh
bq27500
Configuration
48
Data
39
Device Name
S8
x
x
or
–
bq27501
Configuration
49
Discharge
0
SOCF Set %
I1
–1
100
6
%
Configuration
49
Discharge
2
SOCF Clear %
I1
–1
100
8
%
Configuration
49
Discharge
4
Max Load RSOC
I1
0
100
50
%
Manufacturer
System Data
58
0–31
Block A [0–31]
H1
0x00
0xff
0x00
–
Info
Manufacturer
System Data
58
32–63
Block B [0–31]
H1
0x00
0xff
0x00
–
Info
Manufacturer
System Data
58
64–95
Block C [0–31]
H1
0x00
0xff
0x00
–
Info
GENERAL DESCRIPTION
18
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