ZHCSNB6A April 2021 – February 2022 TPS23882B
PRODUCTION DATA
The TPS23882B device has been designed to include programmable SRAM that accommodates future firmware updates to support interoperability and compliance issues that can arise as new equipment is introduced in conjunction with the release of the IEEE 802.3bt standard.
The latest version of firmware and SRAM release notes can be accessed from the TI mySecure Software web page.
The SRAM release notes and ROM advisory document includes more detailed information regarding any know issues and changes that were associated with each firmware release.
Upon power up, it is recommended that the TPS23882B device's SRAM be programmed with the latest version of SRAM code via the I2C to ensure proper operation and IEEE complaint performance. All I2C traffic other than those commands required to program the SRAM should be deferred until after the SRAM programming sequences are completed.
For systems that include multiple TPS23882B devices, the 0x7F "global" broadcast I2C address can be used to programmed all of the devices at the same time.
For more detailed instructions on the SRAM programing procedures, please refer to SRAM CONTROL Register and the How to Load TPS2388x SRAM and Parity Code Over I2C application brief on TI.com.