Configuration Switch (S4); Table 1-2 Configuration Switch (S4) Settings - SMART Embedded Computing MVME3100 Installation And Use Manual

Configuration Switch (S4)

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
Switch
SAFE_START
BOOT BLOCK
SELECT
FLASH BANK
WP
Reserved
VME SCON
AUTO/MANUAL
MODE
MANUAL VME
SCON SELECT
Reserved
TRST SELECT
28
Configuration Switch (S4) Settings
Setting
Pos.
OFF (Factory Default) ON
Normal ENV settings
1
should be used.
Flash memory map is
2 normal and boot block A is
selected.
Entire flash is not write-
3
protected.
4
5 Auto-SCON mode.
6 Non-SCON mode.
7
Normal MPC8540 TRST
8 mode where the board
HRESET will assert TRST.
MVME3100 Single Board Computer Installation and Use (6806800M28H)
Hardware Preparation and Installation
Notes
This switch status is
readable from System
Safe ENV settings Status register 1, bit 5.
should be used. Software may check
this bit and act
accordingly.
Boot block B is
selected and
mapped to the
highest address.
Flash is
write-protected.
Manual SCON mode
Manual SCON works in conjunction
mode. with the VME SCON
SELECT switch.
This switch is only
Always SCON effective when the VME
mode. SCON AUTO/MANUAL
MODE switch is ON.
Isolates the board
HRESET from
This switch should
TRST and allows
remain in the OFF
the board to reset
position unless a
without resetting
MPC8540 emulator is
the MPC8540
attached.
JTAG/COP
interface.