BQ33100: MAC SBS Command Frame Sequence

Mesifn Bedada

Part Number: BQ33100

Hi,

I wanted to access the Manufacturing Access SBS commands but the routine I am using is not working. From the I2C master I used a write to Slave to write the SBS command (e.g. Hardware Version 0x0003) and then a Read from Slave command with the MAC address to get the response. The frame I received was 0xFF00

Write Frame: Slave Address(0x16) => MAC (0x00) => SBS cmd (0x0003)

Read Frame: Slave Address(0x16) => MAC (0x00) => Slave Address (0x17) => Received Frame (0xFF00)

Can you please confirm if this is the right approach, if not can you share what the read and write command sequence is for MAC commands?

Thanks,

Mesfin Bedada

over 6 years ago

0 Bryan Kahler over 6 years ago

TI__Mastermind 25955 points

Hi Mesfin,

These two resources should help:

Visual example:

e2e.ti.com/.../0638.How-to-Program-Data-Flash.pdf

Code example:

www.ti.com/.../slua645.pdf

Sincerely,
Bryan Kahler

0 Mesifn Bedada over 6 years ago in reply to Bryan Kahler

Prodigy 125 points

Hi Bryan,

We had gone through those documents but they did not make it clear how to access the Manufacturer Access Commands listed on the data sheet on page 31 -- Table 40. Those parameters have an extra SBS command, which it is not clear how to use a Read Word SMBus command to get their data. I was hoping to get better clarification on that.

Thanks,

Mesfin Bedada

0 Bryan Kahler over 6 years ago in reply to Mesifn Bedada

TI__Mastermind 25955 points

Hi Mesifn,

Send the MAC command and then the gauge will set the response at MAC register (it's kind of like a mailbox). Then, read from the MAC register.

Sincerely,
Bryan Kahler

Power management

Power management forum

BQ33100: MAC SBS Command Frame Sequence