m58wr064kt Numonyx, m58wr064kt Datasheet - Page 54

• Manufacturer Part Number: m58wr064kt
• Description: 16-, 32-, 64-mbit ?16, Multiple Bank, Burst 1.8 V Supply Flash Memories
• Manufacturer: Numonyx

Dual operations and multiple bank architecture
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Dual operations and multiple bank architecture
The multiple bank architecture of the M58WRxxxKT/B provides flexibility for software
developers by allowing code and data to be split with 4 Mbit granularity. The dual operations
feature simplifies the software management of the device and allows 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 that is
programming or erasing, the program or erase operation can be suspended. Also, if the
suspended operation is erase then a program command can be issued to another block.
This means 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. The combination of these features
means that read operations are possible at any moment.
Dual operations between the parameter bank and either the CFI, OTP, or the electronic
signature memory space are not allowed.
are allowed between the CFI, OTP, electronic signature locations, and the memory array.
Tables
For a complete list of possible commands refer to
tables.
Table 14.
Idle
Programming
Erasing
Program
suspended
Erase suspended
Status of bank
14
and
Dual operations allowed in other banks
15
show the dual operations possible in other banks and in the same bank.
Array
Read
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
Table
Electronic
Signature
Read
Yes
Yes
Yes
Yes
Yes
16, however, shows dual operations that
Appendix D: Command interface state
Program
Yes
Yes
–
–
–
M58WRxxxKT, M58WRxxxKB
Block
Erase
Yes
–
–
–
–
Program/
Suspend
Erase
Yes
Yes
Yes
–
–
Program/
Resume
Erase
Yes
Yes
Yes
–
–