M58LT256JSB8ZA6 STMICROELECTRONICS [STMicroelectronics], M58LT256JSB8ZA6 Datasheet - Page 46

• Manufacturer Part Number: M58LT256JSB8ZA6
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Dual operations and multiple bank architecture
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Dual operations and multiple bank architecture
The multiple bank architecture of the M58LT256JST/B gives greater flexibility for software
developers to split the code and data spaces within the memory array. The Dual operations
feature simplifies the software management of the device by allowing code to be executed
from one bank while another bank is being programmed or erased.
The Dual operations feature means that while programming or erasing in one bank, read
operations are possible in another bank with zero latency (only one bank at a time is allowed
to be in program or erase mode).
If a read operation is required in a bank, which is programming or erasing, the program or
erase operation can be suspended.
Also if the suspended operation was erase then a program command can be issued to
another block, so the device can have one block in Erase Suspend mode, one programming
and other banks in read mode.
Bus Read operations are allowed in another bank between setup and confirm cycles of
program or erase operations.
By using a combination of these features, read operations are possible at any moment in the
M58LT256JST/B device.
Dual operations between the Parameter Bank and either of the CFI, the OTP or the
Electronic Signature memory space are not allowed.
are allowed or not between the CFI, the OTP, the Electronic Signature locations and the
memory array.
Tables
Table 13.
Idle
Programming
Erasing
Program
Suspended
Erase
Suspended
Status of bank
13
and
Dual operations allowed in other banks
14
Array
Read
show the dual operations possible in other banks and in the same bank.
Yes
Yes
Yes
Yes
Yes
Register
Status
Read
Yes
Yes
Yes
Yes
Yes
query
Read
CFI
Yes
Yes
Yes
Yes
Yes
Commands allowed in another bank
Electronic
Signature
Read
Yes
Yes
Yes
Yes
Yes
Table 15
Program,
Program
Buffer
Yes
Yes
–
–
–
M58LT256JST, M58LT256JSB
shows which dual operations
Block
Erase
Yes
–
–
–
–
Suspend
Program
/Erase
Yes
Yes
Yes
–
–
Program
Resume
/Erase
Yes
Yes
Yes
–
–