BQ76930: Query in TI ref design TIDA-00449

Hello, 

In the source code provided by TI in TIDA-00449 resource following part is not clear why it is done, as I am unable to find any reference in available documentation for the waiting performed in code snippet below.

File: drv_bq76930.c

void BqInitialisebqMaximo(void)
{
    uint16_t count = 0;
    bqCoulomb      = 0;
    bqTotalCoulomb = 0;
    bqBalanceIndex = 0;
    bqI2CError = FALSE;

    //BQ76930 need 400ms from SHIP-to-NORMAL transition to first read operation, datasheet, page 21.
    //ALERT will be set in approx. 990ms after SHIP-to-NORMAL transition.
    //Stay here for the alert to be set.
    while(TRUE)
    {
        delay_1ms(1);
        count++;
        if(BqIsAlert() == TRUE)
        {
            break;
        }
        else
        {
            if(count >= 1000)
            {
                //MCU is powered but in 1s ALERT is not set....error
                break;
            }
        }
    }

it would be helpful if anyone can provide documentation reference for above waiting operation.

Thank you