M29W256GH7AN6E NUMONYX, M29W256GH7AN6E Datasheet - Page 40

• Manufacturer Part Number: M29W256GH7AN6E
• Description: Flash Mem Parallel 3V/3.3V 256M-Bit 32M x 8/16M x 16 70ns 56-Pin TSOP Tray
• Manufacturer: NUMONYX

Specifications of M29W256GH7AN6E

• Package: 56TSOP
• Cell Type: NOR
• Density: 256 Mb
• Architecture: Sectored
• Block Organization: Symmetrical
• Location Of Boot Block: Bottom|Top
• Typical Operating Supply Voltage: 3|3.3 V
• Sector Size: 128KByte x 256
• Timing Type: Asynchronous
• Operating Temperature: -40 to 85 °C
• Interface Type: Parallel

6.3.2
40/97
Buffered Program Abort Reset command
A Buffered Program Abort Reset command must be issued to reset the error condition and
return to read mode. One of the erase commands must be used to set all the bits in a block
or in the whole memory from '0' to '1'.
The write to buffer programming sequence can be aborted in the following ways:
The abort condition is indicated by DQ1 = 1, DQ6 = toggle, and DQ5 = 0 (all of which are
status register bits). A Buffered Program Abort and Reset command sequence must be
written to reset the device for the next operation. Note that the full 3-cycle Buffered Program
Abort and Reset command sequence is required when using write to buffer and enhanced
buffered programming features in unlock bypass mode.
See
suggested flowchart on using the Write to Buffer Program command.
Enhanced Buffered Program command set
The Enhanced Buffered Program command set is available only in x 16 mode.
Enhanced Buffered Entry command
Enhanced Buffered Entry command is used in order to allow the execution of the Enhanced
Buffered Program. Once issued the Enhanced Buffered Entry Command, it is possible to
execute Enhanced Buffered Program Command more then one time; there is no need to
repeat it again.
After an Enhanced Buffered Entry Command only the commands belonging to the
Enhanced Buffered Program command set are accepted. Enhanced Buffered Program
command set is listed below:
After these commands any other command is ignored.
In order to be sure that the Entry procedure has successfully completed and the device is
ready to receive one of the commands listed above it is recommended to monitor toggle bit
(DQ6), see
Appendix
Load a value that is greater than the page buffer size during the number of locations to
program step in the Write to Buffer Program command.
Write to an address in a block different than the one specified during the write-buffer
load command.
Write an address/data pair to a different write-buffer-page than the one selected by the
starting address during the write buffer data loading stage of the operation.
Write data other than the Confirm command after the specified number of data load
cycles.
Load address/data pairs in an incorrect sequence during the enhanced buffered
program.
Enhanced Buffered Program command
Enhanced Buffered Program Abort Reset
Enhanced Buffered Program Exit
Figure 9: Data toggle
D,
Figure 29: Write to buffer program flowchart and
flowchart.
pseudocode, for a