M58WR064 STMICROELECTRONICS [STMicroelectronics], M58WR064 Datasheet - Page 31

• Manufacturer Part Number: M58WR064
• Description: 64 Mbit 4Mb x 16, Multiple Bank, Burst 1.8V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

other modes, WAIT is always asserted (except for
Read Array mode).
See Table 21, Synchronous Read AC Character-
istics and Figure 12, Synchronous Burst Read AC
Waveform for details.
Single Synchronous Read Mode
Single Synchronous Read operations are similar
to Synchronous Burst Read operations except that
only the first data output after the X latency is valid.
Synchronous Single Reads are used to read the
DUAL OPERATIONS AND MULTIPLE BANK ARCHITECTURE
The
M58WR064E provides flexibility for software de-
velopers 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 pro-
gramming or erasing in one bank, Read opera-
tions 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 re-
quired in a bank which is programming or erasing,
Table 11. Dual Operations Allowed In Other Banks
Table 12. Dual Operations Allowed In Same Bank
Note: 1. Not allowed in the Block or Word that is being erased or programmed.
Idle
Programming
Erasing
Program Suspended
Erase Suspended
Idle
Programming
Erasing
Program Suspended
Erase Suspended
Status of bank
Status of bank
2. The Read Array command is accepted but the data output is not guaranteed until the Program or Erase has completed.
Multiple
Bank
Array
Yes
Yes
Read
Read
Array
Yes
–
–
Yes
Yes
Yes
Yes
Yes
(2)
(2)
(1)
(1)
Architecture
Register
Register
Status
Status
Read
Read
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
CFI Query
of
Query
Read
Read
Yes
Yes
Yes
Yes
Yes
CFI
Yes
Yes
Yes
Yes
Yes
Commands allowed in another bank
Commands allowed in same bank
the
Electronic
Signature
Electronic
Signature
Read
Electronic Signature, Status Register, CFI, Block
Protection Status, Configuration Register Status
or Protection Register. When the addressed bank
is in Read CFI, Read Status Register or Read
Electronic Signature mode, the WAIT signal is al-
ways asserted.
See Table 21, Synchronous Read AC Character-
istics and Figure 13, Single Synchronous Read AC
Waveform for details.
the Program or Erase operation can be suspend-
ed. Also if the suspended operation was Erase
then a Program command can be issued to anoth-
er block, so the device can have one block in
Erase Suspend mode, one programming and oth-
er banks in Read mode. Bus Read operations are
allowed in another bank between setup and con-
firm cycles of program or erase operations. The
combination of these features means that read op-
erations are possible at any moment.
Tables 11 and 12 show the dual operations possi-
ble in other banks and in the same bank. For a
complete list of possible commands refer to Ap-
pendix D, Command Interface State Tables.
Read
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Program
Program
Yes
Yes
Yes
Yes
–
–
–
–
–
–
(1)
M58WR064ET, M58WR064EB
Block
Erase
Block
Erase
Yes
Yes
–
–
–
–
–
–
–
–
Program/
Suspend
Program/
Suspend
Erase
Erase
Yes
Yes
Yes
Yes
Yes
Yes
–
–
–
–
Program/
Program/
Resume
Resume
Erase
Erase
Yes
Yes
Yes
Yes
Yes
Yes
–
–
–
–
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