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LP8556: lp8556 EEPROM写入问题

Part Number: LP8556

LP8556通过I2C正常写入配置信息后工作正常,但是设备下电后再上电,配置信息就丢失了,还是原先芯片本体的default设置,配置信息没有写入到芯片自带的eeprom中,请问有没有操作示例,能够将配置信息有效写入到eeprom中。

  • HI

        你可以看一下:  https://www.ti.com/lit/ug/snvu179/snvu179.pdf?ts=1654089525899    7.8 Instructions for Burning the EPROM.

  • 按照7.8操作后还是不行,有具体步骤吗,掉电后就是保存不了信息,

  • HI 

        按照这样操作不行吗?

        Once a configuration is set it can be burned to the EPROM. First program all of the CFG registers to their desired value. A write of value 80h is written to register 72h. This sets the write bit. The voltage applied to the VLDO pin is increased to 6V. Another write of 00h to 72h is needed to complete the write process. The VLDO pin can be returned to nominal voltage. Then a read of register 72h should be 0Fh to indicate a successful burn.

         如果按照这个操作保存不了的话,可以在美国E2E上问一下具体的操作,(我这边没有EVM板子可以的操作的)。我看了一下美国论坛那边,也没有具体的步骤,但是对于烧录的操作应该是很熟悉的,或者问一下看是否有例程。

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