Safe Start ENV Header (J10)
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5-41
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Safe Start ENV Header (J10)
A 3-pin 2 mm 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. The pin
assignments for this header are as follows:
Flash 0 Block Write Protect Header (J15)
A 2-pin 2 mm 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 for further details. The pin assignments for this
header are as follows:
Table 5-26. Safe Start ENV Header (J10) Pin Assignments
Pin
Signal
1
GND
2
SAFE_START
3
+3.3V
Table 5-27. Flash 0 Write Protect Header (J15) Pin
Assignments
Pin
Signal
1
+3.3V
2
WP_L