m29dw641f STMicroelectronics, m29dw641f Datasheet - Page 25

• Manufacturer Part Number: m29dw641f
• Description: 64 Mbit 4mb X16, Multiple Bank, Boot Block 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

M29DW641F
6
6.1
6.1.1
6.1.2
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. Failure to observe a
valid sequence of Bus Write Operations will result in the memory returning to Read mode.
The long command sequences are imposed to maximize data security.
Standard commands
See
Read/Reset command
The Read/Reset command returns the memory to Read mode. It also resets the errors in
the Status Register. Either one or three Bus Write Operations can be used to issue the
Read/Reset command.
The Read/Reset command can be issued, between Bus Write cycles before the start of a
Program or Erase Operation, to return the device to Read mode. If the Read/Reset
command is issued during the time-out of a Block Erase Operation, the memory will take up
to 10µs to abort. During the abort period no valid data can be read from the memory.
The Read/Reset command will not abort an Erase Operation when issued while in Erase
Suspend.
Auto Select command
The Auto Select command is used to read the Manufacturer Code, the Device Code, the
Protection status of each block (Block Protection status) and the Extended Block Protection
indicator. It can be addressed to either Bank.
Three consecutive Bus Write Operations are required to issue the Auto Select command.
Once the Auto Select command is issued, Bus Read Operations to specific addresses
output the Manufacturer Code, the Device Code, the Extended Block Protection indicator
and a Block Protection status (see
Table
command is issued.
Table 8: Standard commands
5). The memory remains in Auto Select mode until a Read/Reset or CFI Query
Table 8: Standard commands
for a summary of the Standard commands.
in relation with
Command interface
Table 4
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