28F640L30, 28F128L30, 28F256L30
8.3
Simultaneous Operation Restrictions
Since the L30 flash memory device supports simultaneous read from one partition while
programming or erasing in another partition, certain features like the Protection Registers and CFI
Query data have special requirements with respect to simultaneous operation capability. (Table 12
provides details on restrictions during simultaneous operations.)
Table 12. Simultaneous Operation Restrictions
Protection Parameter
Other
Register or
CFI data
Partition
Notes
Partitions
Array Data
While programming or erasing in a main partition, the Protection
Register or CFI data may be read from any other partition.
Read
(See Notes)
Read
(See Notes) Write/Erase
Reading the parameter partition array data is not allowed if the
Protection Register or Query data is being read from addresses
within the parameter partition.
While programming or erasing in a main partition, read operations
are allowed in the parameter partition.
Read
Read
Write/Erase
Write/Erase
Accessing the Protection Registers or CFI data from parameter
partition addresses is not allowed when reading array data from the
parameter partition.
While programming or erasing in a main partition, read operations
are allowed in the parameter partition.
Accessing the Protection Registers or CFI data in a partition that is
different from the one being programed/erased, and also different
from the parameter partition is allowed.
While programming the Protection Register, reads are only allowed
in the other main partitions.
No Access
Allowed
Write
Read
Read
Access to array data in the parameter partition is not allowed.
Programming of the Protection Register can only occur in the
parameter partition, which means this partition is in Read Status.
While programming or erasing the parameter partition, reads of the
Protection Registers or CFI data are not allowed in any partition.
No Access
Allowed
Write/Erase
Reads in partitions other than the main partitions are supported.
46
Datasheet
INTEL [ INTEL ]
