lrs1383 Sharp Microelectronics of the Americas, lrs1383 Datasheet - Page 64

• Manufacturer Part Number: lrs1383
• Description: Stacked Chip 32m Flash And 8m Sram
• Manufacturer: Sharp Microelectronics of the Americas

4 Command Definitions
Operations of the device are selected by the specific
commands written to the CUI (Command User Interface).
Since commands are partition-specific, it is important to
write commands within the target partition’s address
range (see Table 5).
Each command except for the Full Chip Erase command
and OTP Program command affects only the mode of the
partition to which the command is written.
4.1 Read Array Command
Upon initial device power-up or after reset mode, all the
partitions in the device default to asynchronous read
mode in which 8-word page mode is available. The Read
Array command to a partition places the partition to read
array mode. The partition remains enabled for read array
mode until another valid command is written to the
partition. When RST# is at V
command is valid independent of the voltage on V
Once the internal WSM (Write State Machine) has started
block erase, full chip erase, (page buffer) program or OTP
program in one partition, the partition will not recognize
the Read Array command until the WSM completes its
operation or unless the WSM is suspended via the Block
Erase Suspend or (Page Buffer) Program Suspend
command. However, the Read Array command can be
accepted in other partitions except for full chip erase or
OTP program operation.
Since LH28F320BX/LH28F640BX series provide dual
work capability, partitions not executing block erase or
(page buffer) program operation are allowed to set to the
read array mode and the memory array data within the
partitions can be read without suspending block erase or
(page buffer) program operation.
Synchronous burst mode will be available for future device.
Appendix to Spec No.: MFM2-J13207
IH
, the Read Array
FUM00701
PP
.
Model No.: LRS1383
4.2 Read Identifier Codes/OTP Command
The read identifier codes/OTP mode is initiated by
writing the Read Identifier Codes/OTP command (90H)
to the target partition. Read operations to that partition
output the identifier codes or the data within the OTP
block. To terminate the operation, write another valid
command to the partition. In this mode, the manufacturer
code, device code, block lock configuration codes, read
configuration register code, partition configuration
register code and the data within the OTP block as well as
the OTP block lock state can be read on the addresses
shown in Table 6 through Table 8. Once the internal
WSM has started block erase, full chip erase, (page
buffer) program or OTP program in one partition, the
partition will not recognize the Read Identifier Codes/
OTP command until the WSM completes its operation or
unless the WSM is suspended via the Block Erase
Suspend or (Page Buffer) Program Suspend command.
However, the Read Identifier Codes/OTP command can
be accepted in other partitions except for full chip erase or
OTP program operation. Like the Read Array command,
the Read Identifier Codes/OTP command functions
independently of the V
V
To read the data in the OTP block, it is important to write
addresses within the OTP area’s address range (refer to
Table 6 through Table 8).
Asynchronous page mode and synchronous burst mode
are not available for reading identifier codes/OTP. Read
operations for identifier codes or OTP block support
single asynchronous read cycle or single synchronous
read cycle.
IH
.
March 1, 2001
PP
voltage and RST# must be at
Rev. 2.20
18