20602: Minimum Power Consumption

A question: How can I set up a 20602 so I can keep it on minimum power consumption?

Right now I'm doing this, but still far from the advertised 6uA

void accel_sleep() {

  __IO uint8_t pwrMgmt;
  __i2cWrite(0x6B, 1);
  __i2cWrite(MPUREG_PWR_MGMT_1, 1 << 7);
  __i2cRead(MPUREG_PWR_MGMT_1, (uint8_t*) &pwrMgmt, 1);
  pwrMgmt |= BIT_SLEEP;
  __i2cWrite(MPUREG_PWR_MGMT_1, pwrMgmt);
  HAL_Delay(100);
  __i2cRead(MPUREG_PWR_MGMT_2, (uint8_t*) &pwrMgmt, 1);
  pwrMgmt |= BIT_PWR_ALL_OFF;
  __i2cWrite(MPUREG_PWR_MGMT_2, pwrMgmt);

}