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Configuration of GPOUT pin BQ27441-G1

user4721836
Prodigy 10 points
Other Parts Discussed in Thread: BQ27441-G1

Hi

I am using BQ27441-G1. I am Getting always GPOUT pin held high. I have got the GPOUT configuration info in TRM document.

We observed from bq27441  TRM like "GPOUT pin is a multiplexed pin and The function is defined by OpConfig [BATLOWEN] bit." where as from section Extended data commands it shows as OpConfig is Read only access (in Sealed and Unsealed access modes).
Could i get some info regarding OpConfig Register (like how to configure and Register address to access). 
Please help me on Configuring OpConfig Register for GPOUT interrupt and please correct me if i am missing anything.
i have Few queries onBQ27441.
1. Is OpConfig Register sufficient to configure GPOUT pin? if so then how can i configure it?
2. What is the address location of OpConfig register?
3. I am using 4200mah battery..i calculated the battery parameters like design energy and terminate voltage, etc...are the calculated values correct?
#define BATTERY_CAPACITY 4200
#define DESIGN_ENERGY 15540
#define TERMINATE_VOLTAGE 3400
#define TAPER_RATE 1867
#define TAPER_VOLTAGE 4200
  • 0
    TI__Guru 61986 points
    You have to set BATLOWEN in register OpConfig to 1 and keep GPIOPOL at 0 (default).

    You cannot write to OpConfig with the Extended Data Command. Instead you have to write to OpConfig by updating the Data Memory.

    OpConfig is available at offset zero, subclass 64. It's a big endian 16-bit unsigned integer. By default it is 0x25F8. You have to change it to 0x25FC to set BATLOWEN to 1.

    Updating the Data Memory is described in 3.1, www.ti.com/.../sluuac9a.pdf

    The battery capacity, design energy and taper voltage look ok. What's your taper current?