M28W640FSU70ZA6 Micron Technology Inc, M28W640FSU70ZA6 Datasheet - Page 23

• Manufacturer Part Number: M28W640FSU70ZA6
• Manufacturer: Micron Technology Inc

Specifications of M28W640FSU70ZA6

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Address Bus: 22b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TBGA
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 16b
• Number Of Words: 4M
• Supply Current: 18mA
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

M28WxxxFS, M28WxxxFSU
6.10
6.11
6.12
Program/Erase Suspend command
The Program/Erase Suspend command is used to pause a Program or Erase operation.
One bus write cycle is required to issue the Program/Erase command and pause the
Program/Erase controller.
During Program/Erase Suspend the Command Interface will accept the Program/Erase
Resume, Read Array, Read Status Register, Read Electronic Signature and Read CFI
Query commands. Additionally, if the suspend operation was Erase then the Program,
Double Word Program, Quadruple Word Program or Block Lock commands will also be
accepted. The block being erased may be protected by issuing the Block Protect or Block
Lock commands. When the Program/Erase Resume command is issued the operation will
complete. Only the blocks not being erased may be read or programmed correctly.
During a Program/Erase Suspend, the device can be placed in a pseudo-standby mode by
taking Chip Enable to V
See
Figure 23: Erase Suspend & Resume flowchart and pseudo
the Program/Erase Suspend command.
Program/Erase Resume command
The Program/Erase Resume command can be used to restart the Program/Erase Controller
after a Program/Erase Suspend operation has paused it. One Bus Write cycle is required to
issue the command. Once the command is issued subsequent Bus Read operations read
the Status Register.
See
Figure 23: Erase Suspend & Resume flowchart and pseudo
the Program/Erase Resume command.
Protection Register Program command
The Protection Register Program command is used to Program the 128 bit user One-Time-
Programmable (OTP) segment of the Protection Register. The segment is programmed 16
bits at a time. When shipped all bits in the segment are set to ‘1’. The user can only program
the bits to ‘0’.
Two write cycles are required to issue the Protection Register Program command.
Read operations output the Status Register content after the programming has started.
The segment can be protected by programming bit 1 of the Protection Lock Register (see
Figure 10: Protection Register memory
Protection Register will result in a Status Register error. The protection of the Protection
Register is not reversible.
The Protection Register Program cannot be suspended.
Appendix
Appendix
The first bus cycle sets up the Protection Register Program command.
The second latches the Address and the Data to be written to the Protection Register
and starts the Program/Erase Controller.
C,
C,
Figure 21: Program Suspend & Resume flowchart and pseudo
Figure 21: Program Suspend & Resume flowchart and pseudo
IH
. Program/Erase is aborted if Reset turns to V
map). Attempting to program a previously protected
code, for flowcharts for using
code, for flowcharts for using
Command Interface
IL
.
code, and
code, and
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