PS401-I/SS Microchip Technology, PS401-I/SS Datasheet - Page 16

• Manufacturer Part Number: PS401-I/SS
• Description: IC FUEL GAUGE BATTERY MGR 28SSOP
• Manufacturer: Microchip Technology

Specifications of PS401-I/SS

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PS401
6.0
6.1
GPIO0-GPIO7 are eight 16-bit OTP parameters that
are programmed to configure the safety or charge
condition desired for their associated pins. GPIO5 and
GPIO6 must be programmed to configure the desired
safety features described below.
There are 8 different functions that can be AND'ed and
OR'd together for secondary safety. In GPIO0-GPIO7,
the lower 8-bits are the AND bits and the upper 8-bits
are the OR bits. The bits correspond to the secondary
safety function as listed in Table 6-1.
The logic selected operates as follows:
AND byte
Desired trigger conditions are selected with a ‘1’ in the
control bit. All selected conditions must be true for a
true "AND" condition. If no conditions are desired, 0FFh
must be written to the byte.
TABLE 6-1:
TABLE 6-2:
DS40238B-page 16
OR Byte
OR Byte
Bit
15
14
13
12
11
10
Bit
15
14
13
12
11
10
9
8
9
8
GPIO CONFIGURATION
Safety Condition Programming
AND Byte
AND Byte
Bit
GPIO SAFETY CONDITIONS
7
6
5
4
3
2
1
0
GPIO CHARGE CONDITIONS
Bit
7
6
5
4
3
2
1
0
V
V
Vcell_Diff > SafetyDiffVCell
V
Temperature > SafetyMaxTemp
Temperature < SafetyMinTemp
Charge Current > SafetyIMaxC
Discharge Current > SafetyIMaxD
V
Terminate Charge Alarm
Fully Charged Flag
SOC > MaxSOC
Temperature > SafetyMaxTemp
Precharge Condition True
Input Pin Activated
V
CELL
CELL
PACK
CELL
CELL
x > SafetyMaxVCell
x < SafetyMinVCell
x > SafetyMaxVCell
x > EOCVolt
> SafetyMaxVPack
Charge Condition
Safety Condition
OR byte
Desired trigger conditions are selected with a ‘1’ in the
control bit. Any selected condition which is true will
cause a true "OR" condition. If no conditions are
desired, 00h must be written to the byte. GPIOx pin
activation results when all "AND" condition OR any
"OR" condition is true.
Example:
If _AND byte is set to 088h, and _OR byte is set to
010h, then the OUTPUTx pin is active only if:
Any cell voltage rises above SafetyMaxVCell
Terminate Charge Alarm Active
Fully Charged Flag in Battery Status is set
State-Of-Charge greater than MaxSOC
Temperature rises above SafetyMaxTemp
PreCharge condition exists
GPIO set up as switch is pressed or input active
Any cell voltage rises above end of charge voltage
Any cell voltage rises above SafetyMaxVCell
Any cell voltage falls below SafetyMinVCell
The difference between two cells is greater
than SafetyDiffVCell
Pack voltage rises above SafetyMaxVPack
Temperature rises above SafetyMaxTemp
Temperature falls below SafetyMinTemp
Charge current rises above SafetyIMaxC
Charge current rises above SafetyIMaxD
[ (V
TEMP_MAX)] OR [V
CELL
x > VCELL_MAX) AND (Temperature >
Description
Description
 2003 Microchip Technology Inc.
PACK
> VPACK_MAX]