AM62AX vs AM62A7: what's the difference?

A TI K3 U-Boot banner on the AM62A Starter Kit prints two names for what looks like the same chip:

SoC:   AM62AX SR1.0 HS-FS
Model: Texas Instruments AM62A7 SK

`AM62AX` is the silicon family name. TI uses the X suffix (also seen as AM62X, AM64X, J721EX) as an internal umbrella for a family of dies that share a base implementation. The chip-ID register on the die returns the family name: this is what the U-Boot SoC-detection code prints.

`AM62A7` is the retail product SKU. TI's Sitara marketing lineup uses part numbers like AM62A3, AM62A7, AM68A, AM69A: each SKU is one die (AM62AX family) with a specific fuse configuration burned at TI's factory to enable a particular subset of cores and features. AM62A7 has all four Cortex-A53 cores and the C7x DSP enabled; AM62A3 has fewer.

The Model: line comes from the device tree loaded by U-Boot, which knows which board it's on (the SK = Starter Kit) and reports the marketing name that appears on the sticker.

So: same die, two names because U-Boot reads both the die-level chip-ID and the board-level DT model string. Same pattern on every K3 SKU: expect to see AM64X in banners on AM64x boards, J721EX on J721E boards, etc.