Hardware Preparation and Installation
MVME3100 Single Board Computer Installation and Use (6806800M28C)
26
1.4.2 Configuration Switch (S4)

An 8-position SMT configuration switch controls the VME SCON setting, Flash bank write-

protect, and the safe start ENV settings. It also selects the Flash boot image. The default setting

on all switch positions is OFF.

Table 1-2 Configuration Switch (S4) Settings

Switch Pos.
Setting
NotesOFF (Factory Default) ON
SAFE_START 1 Normal ENV settings
should be used.
Safe ENV settings
should be used.
This switch status is
readable from System
Status re gis te r 1, bi t 5 .
Software may check
this bit and act
accordingly.
BOOT BLOCK
SELECT
2 Flash memory map is
normal and boot block A
is selected.
Boot block B is
selected and mapped
to the highest
address.
FLASH BANK WP 3 Entire Flash is not write-
protected.
Flash is write-
protected.
Reserved 4
VME SCON
AUTO/MANUAL
MODE
5 Auto-SCON mode. Manual SCON mode. Manual SCON mode
works in conjunction
with the VME SCON
SELECT switch.
MANUAL VME
SCON SELECT
6 Non-SCON mode. Always SCON mode. This switch is only
effective when the
VME SCON
AUTO/MANUAL
MODE switch is ON.
Reserved 7