UCD3138128APFC datasheet(60/83 Pages) TI1

60 / 83 page

UCD3138128A

SLUSC99 – JULY 2016

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Product Folder Links: UCD3138128A

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9.5.2.1 Pseudo Code for ROM

-> If PFLASH[0], location 0 = 0xEA

-> If PFLASH[0] 2K/32K checksum is valid ==> Execute PFLASH[0}

-> Else,

-> If PFLASH[0-1] 64K checksum is valid ==> Execute PFLASH[0]

-> If PFLASH[0-3] 128K checksum is valid ==> Execute PFLASH[0]

-> If PFLASH[2], location 0 = 0xEA

-> Else If PFLASH[2], location 0 = 0xEA

-> PFLASH[2-3] 64K checksum is valid ==> Execute PFLASH[2]

-> Else

-> Stay in ROM mode

9.5.3 Customer Boot Program

As described above, it is possible to generate a user boot program using 2 kB or more of the Program Flash.

This can support things which the Boot ROM does not support, including:

•

Program download via UART – useful especially for applications where the UCD3138128A is isolated from

the host (that is, PFC)

•

Encrypted download – useful for code security in field updates.

•

PMBus download at different addresses

•

Different command formats

9.5.4 Flash Management

The device offers a variety of features providing for easy prototyping and easy flash programming. At the same

time, high levels of security are possible for production code, even with field updates. Standard firmware will be

provided for storing multiple copies of system parameters in data flash. This minimizes the risk of losing

information if data-flash programming is interrupted.

UCD3138128APFC Datasheet(PDF) 60 Page - Texas Instruments