84PCE:Ports:0028
From WikiTI
Synopsis
Port Number: 0028
Function: Flash locked status
Flash is unlocked iff bits 2 and 3 of this port are both set.
bit 2: can be modified freely (under the usual protected port constraints)
bit 3: can be cleared by writing a 0 or any time unprivileged code is executed, fetching the flash unlock sequence (F31800F3F3ED7EED56ED3928ED3828CB57) ending in privileged flash is the only way to set it
Details
This port's function is unknown.
Bit [0]
Latches value written, no apparent effect.
Bit [1]
Always 0, writes do not latch.
Bit [2]
Latches value written, no apparent effect.
Bits [7:3]
Writes do not latch, no apparent effect.
