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Whats is Device Feature in dfuse ?

Question asked by Uwe Bonnes on May 1, 2017
Latest reply on May 8, 2017 by Uwe Bonnes

E.g the F767 offers 4 dfu interfaces:

..  alt=3, name="@Device Feature/0xFFFF0000/01*004 e", serial="395734643435"
... alt=2, name="@OTP Memory /0x1FF0F000/01*001Ke,01*032 e", serial="395734643435"
... alt=1, name="@Option Bytes /0x1FFF0000/01*032 e", serial="395734643435"
... alt=0, name="@Internal Flash /0x08000000/04*032Kg,01*128Kg,07*256Kg", serial="395734643435


While I understand alternate interface 0-2, I don't find any information about the "Device feature interface" . An3156 Table 6. mentions it as introduced with V2.1, but gives no further hint.