Flash Control/Status Register; Table 6-7 Flash Control/Status Register - SMART Embedded Computing MVME3100 Installation And Use Manual

Flash Control/Status Register

6.2.8 Flash Control/Status Register
The MVME3100 provides software-controlled bank write protect and map select functions
as well as boot block select, bank write protect, and activity status for the flash.
Table 6-7
REG
BIT
FIELD
OPER
RESET
FLASH_RDY
Flash ready. This bit provides the current state of the flash devices' Ready/Busy# pins.
These open drain output pins from each flash device are wire OR'd to form Flash Ready.
FBT_BLK_SEL
Flash boot block select. This bit reflects the current state of the BOOT BLOCK B SELECT
switch. A cleared condition indicates that boot block A is selected and mapped to the
highest address. A set condition indicates that boot block B is selected and mapped to the
highest address.
F_WP_HW
Hardware flash bank write protect switch status. This bit reflects the current state of the
FLASH BANK WP switch. A set condition indicates that the entire flash bank is write
protected. A cleared condition indicates that the flash bank is not write protected.
F_WP_SW
Software flash bank write protect. This bit provides software-controlled protection against
inadvertent writes to the flash memory devices. A set condition indicates that the entire
flash is write-protected. A cleared condition indicates that the flash bank is not
write-protected, only when the hardware write-protect bit is also not set. This bit is set
during reset and must be cleared by the system software to enable writing of the flash
devices.
108
Flash Control/Status Register
Flash Control/Status Register - 0xE2000003
7 6 5
R R R
0 0 0
MVME3100 Single Board Computer Installation and Use (6806800M28H)
4 3 2
R/W R/W R
0 1 X
Memory Maps
1 0
R R
X 1