TPS23881: TPS23881 SRAM writes firmware

Kevin Huang8

Part Number: TPS23881

Tool/software:

Regarding the TPS23881 startup procedure, according to the Application Brief How to Load TPS2388x SRAM and Parity Code Over I2C:

Regarding Highlight's question,
Does the firmware need to be written to the TPS23881's SRAM before each startup?
Or does it need to be written to the TPS23881's SRAM only during the first startup?
Unless the TPS23881 requires a firmware update, this step can be omitted.

23 days ago

0 Anagha Jagannath 23 days ago

TI__Prodigy 515 points

Hello Kevin,

Thank you for your question. The SRAM must be programmed via I2C every time TPS23881 is powered on. Any other I2C commands (unrelated to SRAM programming) must wait until the SRAM programming has been completed. Please let me know if there are any further questions!

Best,

Anagha

0 Kevin Huang8 20 days ago in reply to Anagha Jagannath

Genius 4636 points

Hi Anagha,

Have any SRAM setting parameters and tools can provided?

0 Anagha Jagannath 19 days ago in reply to Kevin Huang8

TI__Prodigy 515 points

Hi Kevin,

Parameters for SRAM programming for the TPS23881 can be found in the following resources:

1. TPS23881 Type-4 4-Pair 8-Channel PoE 2 PSE Controller with SRAM and 200 mΩ RSENSE datasheet (Rev. E)

Specifically:

Register 0x60: SRAM CONTROL
Register 0x62: SRAM START ADDRESS
SRAM Programming Section (Page 120 of Datasheet)

2. How to Load TPS2388x SRAM and Parity Code Over I2C (Rev. E)

3. As mentioned in the Application Note linked above, newest version of firmware can be found on TI's mySecure Software page.

Best,

Anagha

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TPS23881: TPS23881 SRAM writes firmware