Motorola SPX3BUM/D User Manual page 9

Sandpoint microprocessor evaluation system
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Switch
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3.1.1 ROMSEL
The "ROMSEL" switch may be used to select between the primary and secondary flash device (if any) on
the Sandpoint 3.
ROMSEL
SW1-1
On (right)
Primary ROM (29F040) is used for PCI boot
Off (left)
Secondary ROM (28F800) is used for PCI boot
NOTE: Not all Sandpoint 3's have a secondary flash.
NOTE: The RMODE switch (see Section 3.3.2) overrides this switch.
3.1.2 ROM1WP
The "ROM1WP" switch may be used to write-protect the secondary (backup) PCI-hosted boot ROM, if any.
This primary ROM normally contains the DINK debugger, but with the backup ROM protected, users may
overwrite the boot ROMs with development code and still return to DINK as a backup measure.
ROM1WP
SW1-2
On (right)
Off (left)
NOTE: Not all Sandpoint 3's have a secondary flash.
3.1.3 Reserved
Switch SW2-3 is reserved and has no function.
MOTOROLA
Table 1. Sandpoint 3 SW1 Options
Name
SSRNG
Spread-Spectrum Range
PSON
Force Power Supply ON
Table 2. Sandpoint 3 ROMSEL Option
Definition
option.
option.
Table 3. Sandpoint 3 ROM1WP Switch
Definition
ROM1 may be read to or written from.
ROM1 is write-protected.
Definition
Normal mode.
Use to store OS code.
Default
Notes
Notes
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