bq20z90 ROM mode

Eduard Mindubaev

Prodigy 50 points

Other Parts Discussed in Thread: BQ20Z90

Hello,

Where I can find list of ROM mode commands for bq20z90?

Regards

over 13 years ago

0 ThomasCosby over 13 years ago

TI__Guru 73830 points

Eduard,

Do you need to communicate with the device in ROM mode or are you referring to SBS commands to access parameters? You do not have to enter ROM mode to use SBS commands.

Regards

Tom

0 Eduard Mindubaev over 13 years ago in reply to ThomasCosby

Prodigy 50 points

Thomas,

I referring to example of reading DFI file given in slua355b

Part of code:

'// Multiplication by 32 gives us the actual physical address where each row starts

lError = WriteSMBusInteger(&H9, (&H200 + iRow) * 32)
'// Read the row. &HC (0x0c) is the ROM mode command.
lError = ReadSMBusByteArray(&HC, yRowData, iLen)

I cant find description of what this commands (0x0c and 0x09) do.

Regards

Eduard

0 ThomasCosby over 13 years ago in reply to Eduard Mindubaev

TI__Guru 73830 points

Eduard

09 sets the command to set the starting row address.

0c is the command to set the number of bytes to read.

Regards

Tom

0 Eduard Mindubaev over 13 years ago in reply to ThomasCosby

Prodigy 50 points

Thomas,

Can you send me document where I can find full list of commands like this?

Regards

Eduard

0 ThomasCosby over 13 years ago in reply to Eduard Mindubaev

TI__Guru 73830 points

Eduard,

ROM mode commands are for internal use and we do not provide the full list outside of TI. Please follow the VB6 examples that we provided to access data flash and for calibration. They should provide all of the information that is required.

Regards
Tom

Power management

Power management forum

bq20z90 ROM mode