Properly addressing the BQ79600-Q1 and each BQ79616-Q1 device in a stack is critical for proper operation of the devices. In addition to the summary of the following main points, all devices must be addressed sequentially up the stack, with a best practice of starting from address 0x00 for the bridge device.

• Follow the WAKEUP procedure to make sure that all devices are awake and available for auto-addressing.

• Dummy stack write 0x00 to registers OTP_ECC_DATAIN1 to OTP_ECC_DATAIN8 (register address 0x343 to 0x34A) on the BQ79616-Q1. This is a total of 8 stack writes (one for each register) to synchronize the DLLs used for reclocking the daisy chain interface.

• Broadcast write 0x01 to register address 0x309 CONTROL1 to enable auto addressing.

• Broadcast write consecutively to register address 0x306 DIR0_ADDR the values 0x00, 0x01, 0x02, and so forth to set the north communication device addresses.

• Broadcast write 0x02 to register address 0x308 to set BQ79616-Q1 as stack devices.

• Single device write 0x03 to register address 0x308 of top device (device 6 in this example) in order to set it as the top of the stack. Please note that this step is critical for broadcast reads to work properly!

• Stack read registers OTP_ECC_DATAIN1 to OTP_ECC_DATAIN8 (register address 0x343 to 0x34A). This is a total of 8 stack reads (one for each register) intended to sync up internal DLL.

• Stack read register address 0x306 to verify that all stack devices have been addressed correctly.

• Single device read from the base BQ79600-Q1 device the register address 0x2001 and verify that the value is 0x14.

• Proceed to register initialization.

Figure 1-3 Auto-Addressing Flowchart