Flash Boot Bank Select Header (J8)
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Flash Boot Bank Select Header (J8)
A 3-pin planar header selects the boot Flash bank. No jumper or a jumper
installed across pins 1-2 selects Flash 0 as the boot bank. A jumper
installed across pins 2-3 selects Flash 1 as the boot bank.
Flash 0 Programming Enable Header (J9)
A 2-pin planar header enables/disables programming of Flash 0 as a means
of protecting the contents from being corrupted. No jumper installed
disables all Flash 0 programming. The jumper must be installed in order to
erase array blocks, programming data, or configuring lock-bits.
J8
1
2
3
1
2
3
Boots from Flash device 0
J8
J8
1
2
3
(factory configuration)
Boots from Flash device 0
Boots from Flash device 0
Boots from Flash device 1
1
2
Disables Flash 0 writes
J9
(factory configuration)
1
2
J9
Enables Flash 0 writes