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M58WR064HT Datasheet(PDF) 49 Page - Numonyx B.V

Part # M58WR064HT
Description  64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories
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Manufacturer  NUMONYX [Numonyx B.V]
Direct Link  http://www.numonyx.com
Logo NUMONYX - Numonyx B.V

M58WR064HT Datasheet(HTML) 49 Page - Numonyx B.V

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M58WR064HT, M58WR064HB
Dual operations and multiple bank architecture
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10
Dual operations and multiple bank architecture
The Multiple Bank Architecture of the M58WR064HT/B provides flexibility for software
developers by allowing code and data to be split with 4Mbit 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 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. 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. Table 14 however shows dual operations, which
are allowed between the CFI, OTP, Electronic Signature locations and the memory array.
Tables 12 and 13 show the dual operations possible in other banks and in the same bank.
For a complete list of possible commands refer to Appendix D: Command interface state
tables.
Table 12.
Dual Operations Allowed In Other Banks
Status of bank
Commands allowed in another bank
Read
Array
Read
Status
Register
Read
CFI
Query
Read
Electronic
Signature
Program
Block
Erase
Program/
Erase
Suspend
Program/
Erase
Resume
Idle
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Programming
Yes
Yes
Yes
Yes
Yes
Erasing
Yes
Yes
Yes
Yes
Yes
Program
Suspended
Yes
Yes
Yes
Yes
Yes
Erase Suspended
Yes
Yes
Yes
Yes
Yes
Yes


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