M28W640FSU70ZA6 Micron Technology Inc, M28W640FSU70ZA6 Datasheet - Page 19

• 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
6.1
6.2
6.3
Command Interface
All Bus Write operations to the memory are interpreted by the Command Interface.
Commands consist of one or more sequential Bus Write operations. An internal
Program/Erase Controller handles all timings and verifies the correct execution of the
Program and Erase commands. The Program/Erase Controller provides a Status Register
whose output may be read at any time, to monitor the progress of the operation, or the
Program/Erase states. See
see
of the Command Interface.
The Command Interface is reset to Read mode when power is first applied, when exiting
from Reset or whenever V
exactly. Any invalid combination of commands will reset the device to Read mode. Refer to
Table 5:
Read Memory Array command
The Read command returns the memory to its Read mode. One Bus Write cycle is required
to issue the Read Memory Array command and return the memory to Read mode.
Subsequent read operations will read the addressed location and output the data. When a
device Reset occurs, the memory defaults to Read mode.
Read Status Register command
The Status Register indicates when a program or erase operation is complete and the
success or failure of the operation itself. Issue a Read Status Register command to read the
Status Register’s contents. Subsequent Bus Read operations read the Status Register at
any address, until another command is issued. See
on the definitions of the bits.
The Read Status Register command may be issued at any time, even during a
Program/Erase operation. Any Read attempt during a Program/Erase operation will
automatically output the content of the Status Register.
Read Electronic Signature command
The Read Electronic Signature command reads the Manufacturer and Device Codes, and
the Protection Register.
The Read Electronic Signature command consists of one write cycle, a subsequent read will
output the Manufacturer Code, the Device Code and the Protection Register. See
and
Appendix
Table 7
Commands, in conjunction with the text descriptions below.
for the valid address.
D,
Table 34: Write State Machine Current/Next, sheet 1 of
DD
Table 4: Command
is lower than V
LKO
codes, for a summary of the commands and
. Command sequences must be followed
Table 9: Status Register
Command Interface
2., for a summary
bits, for details
Table
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6,