A d v a n c e I n f o r m a t i o n
A program operation while in the erase suspend mode is the same as pro-
gramming in the regular program mode, except that the data must be pro-
grammed to a sector that is not erase suspended. Write operation status is
obtained in the same manner as a normal program operation.
Sector Erase and Program Resume Command
The Sector Erase and Program Resume command (30h) resumes a Sector Erase
or Program operation that has been suspended. Any further writes of the Sector
Erase and Program Resume command ignored. However, another Sector Erase
and Program Suspend command can be written after the device has resumed
sector erase operations. Note that until a suspended program or erase operation
has resumed, the contents of that sector are unknown.
The Sector Erase and Program Resume Command is ignored if the SecSi sector
is enabled.
Configuration Register Read Command
The Configuration Register Read command is used to verify the contents of the
Configuration Register. Execution of this command is only allowed while in user
mode and is not available during Unlock Bypass mode or during Security mode.
The Configuration Register Read command is preceded by the standard two-cycle
“unlock” sequence, followed by the Configuration Register Read command (C6h),
and finally followed by performing a read operation to the bank address specified
when the C6h command was written. Reading the other bank results in reading
the flash memory contents. The contents of the Configuration Register are place
on DQ15–DQ0. Contents of DQ31–DQ16 are XXXXh and should be ignored. The
user should execute the Read/Reset command to place the device back in stan-
dard user operation after executing the Configuration Register Read command.
The Configuration Register Read Command is fully operational if the SecSi sector
is enabled.
Configuration Register Write Command
The Configuration Register Write command is used to modify the contents of the
Configuration Register. Execution of this command is only allowed while in user
mode and is not available during Unlock Bypass mode or during Security mode.
The Configuration Register Write command is preceded by the standard two-cycle
“unlock” sequence, followed by the Configuration Register Write command (D0h),
and finally followed by writing the contents of the Configuration Register to any
address. The contents of the Configuration Register are placed on DQ31–DQ0.
The contents of DQ31–DQ16 are XXXXh and are ignored. Writing the Configura-
tion Register while an Embedded Algorithm™ or Erase Suspend modes are
executing results in the contents of the Configuration Register not being updated.
The Configuration Register Read Command is fully operational if the SecSi sector
is enabled.
Common Flash Interface (CFI) Command
The Common Flash Interface (CFI) command provides device size, geometry, and
capability information directly to the users system. Flash devices that support
CFI, have a “Query Command” that returns information about the device to the
system. The Query structure contents are read at the specific address locations
following a single system write cycle where:
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S29CD032G
30606B0 March 22, 2004
SPANSION [ SPANSION ]
