Table 7-6 Flash Options - SMART Embedded Computing MVME3100 Installation And Use Manual

Flash Memory
Table 7-6
Flash Bank Size
32MB
64MB
128MB
A hardware flash bank write protect switch is provided on the MVME3100 to enable write
protection of both physical banks. Regardless of the state of the software flash write protect
bit in the Flash Control/Status register, write protection is enabled for both banks when this
switch is ON. When this switch is OFF, write protection is controlled by the state of the
software flash write protect bit and can only be disabled by clearing this bit in the Flash
Control/Status register. Refer to
information.
The F_WE_HW bit reflects the state of the switch and is only software readable, whereas
the F_WP_SW bit supports both read and write operations.
The MVME3100 provides a dual boot option for booting from one of two separate boot
images in the boot flash bank, which are referred to as boot block A and boot block B. Boot
blocks A and B are each 1MB in size and are located at the top (highest address) 2MB of
the boot flash memory space. Boot block A is located at the highest 1MB block and block
B is the next highest 1MB block. A FLASH boot block switch is used to select between boot
block A and boot block B. When the switch is OFF, the flash memory map is normal and
block A is selected. When the switch is ON, block B is mapped to the highest address as
shown below. The MAP_SEL bit in the Flash Control/Status register can override the switch
and restore the memory map to the normal configuration with block A selected. Upon
RESET, this mapping reverts to the switch selection.
132
Flash Options
Spansion Part Number
S29GL128N
S29GL256N
S29GL512N
Flash Control/Status Register on page 108
MVME3100 Single Board Computer Installation and Use (6806800M28H)
Programming Details
Device Size
128 Mbit
256 Mbit
512 Mbit
for more