R
Platform Flash XL High-Density Configuration and Storage Device
Program bit shows if the device is ready to accept a new
word to be programmed to the memory array.
Block Protection Status Bit (SR1)
The Block Protection Status bit is used to identify if a
Program or Block Erase operation tried to modify the
contents of a locked or locked-down block. When this bit is
High (set to ‘1’), a program or erase operation was
attempted on a locked or locked-down block.
The Bank Write Status bit should only be considered valid
when the Program/Erase Controller Status SR7 is Low
(set to ‘0’).
When both the Program/Erase Controller Status bit and the
Bank Write Status bit are Low (set to ‘0’), the addressed
bank is executing a program or erase operation. When the
Program/Erase Controller Status bit is Low (set to ‘0’) and
the Bank Write Status bit is High (set to ‘1’), a program or
erase operation is being executed in a bank other than the
one being addressed.
After set High, the Block Protection Status bit must be set
Low by a Clear Status Register command or a hardware
reset before a new program or erase command is issued;
otherwise, the new command appears to fail.
Bank Write/Multiple Word Program Status
Bit (SR0)
In Buffer Enhanced Factory Program mode, if Multiple Word
Program Status bit is Low (set to ‘0’), the device is ready for
the next word; if the Multiple Word Program Status bit is
High (set to ‘1’) the device is not ready for the next word.
The Bank Write Status bit indicates whether the addressed
bank is busy performing a write or is ready to accept a new
write command (a program or erase command). In Buffer
Enhanced Factory Program mode, the Multiple Word
For further details on how to use the Status Register, see
the Flowcharts and Pseudocodes provided in "Appendix C:
Flowcharts and Pseudocodes," page 71.
DS617 (v3.0.1) January 07, 2010
www.xilinx.com
Product Specification
23
XILINX [ XILINX, INC ]
