R
Platform Flash XL High-Density Configuration and Storage Device
Controller is active; when the bit is High (set to ‘1’), the
controller is inactive, and the device is ready to process a
new command.
Attempting to program a '1' to an already programmed bit
while V = V also sets the Program Status bit High. If
PP
PPH
V
is different from V
, SR4 remains Low (set to '0'), and
PP
PPH
the attempt is not shown.
The Program/Erase Controller Status bit is Low immediately
after a Program/Erase Suspend command was issued until
the controller pauses. After the Program/Erase Controller
pauses the bit is High.
After set High, the Program Status bit must be set Low by a
Clear Status Register command or a hardware reset before
a new program command is issued; otherwise, the new
command appears to fail.
Erase Suspend Status Bit (SR6)
VPP Status Bit (SR3)
The Erase Suspend Status bit indicates that an erase
operation is suspended. When this bit is High (set to ‘1’), a
Program/Erase Suspend command was issued and the
memory is waiting for a Program/Erase Resume command.
The V Status bit is used to identify an invalid voltage on
PP
the V pin during program and erase operations. The V
PP
PP
pin is only sampled at the beginning of a program or erase
operation. Program and erase operations are not
The Erase Suspend Status bit should only be considered
valid when the Program/Erase Controller Status bit is High
(Program/Erase Controller inactive). SR6 is set within the
Erase Suspend Latency time of the Program/Erase
Suspend command being issued; therefore, the memory
can still complete the operation rather than entering the
Suspend mode.
guaranteed if V becomes invalid during an operation.
PP
When the V Status bit is Low (set to ‘0’), the voltage on
PP
the V pin was sampled at a valid voltage.
PP
When the V Status bit is High (set to ‘1’), the V pin has
PP
PP
). the
a voltage below the V Lockout Voltage (V
PP
PPLK
memory is protected and program and erase operations
cannot be performed.
When a Program/Erase Resume command is issued, the
Erase Suspend Status bit returns Low.
After set High, the V Status bit must be set Low by a Clear
PP
Status Register command or a hardware reset before a new
program or erase command is issued; otherwise, the new
command appears to fail.
Erase/Blank Check Status Bit (SR5)
The Erase/Blank Check Status bit is used to identify if an
error occurred during a Block Erase operation. When this bit
is High (set to ‘1’), the Program/Erase Controller applied the
maximum number of pulses to the block and still failed to
verify that it erased correctly.
Program Suspend Status Bit (SR2)
The Program Suspend Status bit indicates that a program
operation is suspended. This bit should only be considered
valid when the Program/Erase Controller Status bit is High
(Program/Erase Controller inactive).
The Erase/Blank Check Status bit should be read after the
Program/Erase Controller Status bit is High (Program/Erase
Controller inactive).
When the Program Suspend Status bit is High (set to ‘1’), a
Program/Erase Suspend command was issued, and the
memory is waiting for a Program/Erase Resume command.
The Erase/Blank Check Status bit is also used to indicate
whether an error occurred during the Blank Check
operation. If the data at one or more locations in the block
where the Blank Check command was issued is different
from FFFFh, SR5 is set to '1'.
SR2 is set within the Program Suspend Latency time of the
Program/Erase Suspend command being issued; therefore,
the memory can still complete the operation rather than
entering the Suspend mode.
After set High, the Erase/Blank Check Status bit must be set
Low by a Clear Status Register command or a hardware
reset before a new erase command is issued; otherwise, the
new command appears to fail.
When a Program/Erase Resume command is issued, the
Program Suspend Status bit returns Low.
Program Status Bit (SR4)
The Program Status bit is used to identify if there is an error
during a program operation. This bit should be read after the
Program/Erase Controller Status bit is High (Program/Erase
Controller inactive).
When the Program Status bit is High (set to ‘1’), the
Program/Erase Controller applied the maximum number of
pulses to the word and still failed to verify that it
programmed correctly.
DS617 (v3.0.1) January 07, 2010
www.xilinx.com
Product Specification
22
XILINX [ XILINX, INC ]
