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Hardware Preparation and Installation
1
Safe Start ENV Header (J10)
A 3-pin planar header selects programmed or safe start ENV settings. No
jumper or a jumper across pins 1-2 indicates that the programmed ENV
settings should be used during boot. A jumper across pins 2-3 indicates
that the safe ENV settings should be used.
Flash 0 Block Write Protect Header (J15)
A 2-pin planar header supports the Intel K3 Flash family write protect
feature. No jumper installed enables the lock-down mechanism. Blocks
locked down cannot be unlocked with the unlock command. The jumper
must be installed in order to override the lock-down function and enable
blocks to be erased or programmed through software. Refer to the Intel K3
Flash data sheet, listed in
Appendix D, Related Documentation
, for further
details.
J10
1
2
3
1
2
3
Normal ENV settings used
J10
J10
1
2
3
(factory configuration)
during boot
Normal ENV settings used
during boot
Safe ENV settings used
during boot
1
2
Disable Flash 0 K3
J15
(factory configuration)
1
2
J15
block writes
Enable Flash 0 K3
block writes