M28W640HCT70N6E NUMONYX, M28W640HCT70N6E Datasheet - Page 17

• Manufacturer Part Number: M28W640HCT70N6E
• Description: TSOP-1 48 12X20 CUSTD FLASH
• Manufacturer: NUMONYX

M28W640HCT, M28W640HCB
4.4
4.5
Table 3.
Read CFI Query command
The Read Query command is used to read data from the common Flash interface (CFI)
memory area, allowing programming equipment or applications to automatically match their
interface to the characteristics of the device. One Bus Write cycle is required to issue the
Read Query command. Once the command is issued subsequent bus read operations read
from the common Flash interface memory area. See
(CFI), tables 25, 26, 27, 28,
common Flash interface memory area.
Block Erase command
The Block Erase command can be used to erase a block. It sets all the bits within the
selected block to ’1’. All previous data in the block is lost. If the block is protected then the
erase operation will abort, the data in the block will not be changed and the Status Register
will output the error.
Two Bus Write cycles are required to issue the command:
●
●
If the second bus cycle is not Write Erase Confirm (D0h), Status Register bits b4 and b5 are
set and the command aborts.
The first bus cycle sets up the Erase command
The second latches the block address in the internal state machine and starts the
Program/Erase controller.
Hex code
C0h
D0h
2Fh
B0h
FFh
01h
10h
20h
30h
40h
50h
56h
60h
70h
90h
98h
Command codes
Block Lock confirm
Program
Erase
Block Lock-down confirm
Double Word Program
Program
Clear Status Register
Quadruple Word Program
Block Lock, Block Unlock, Block Lock-down
Read Status Register
Read Electronic Signature
Read CFI Query
Program/Erase Suspend
Protection Register Program
Program/Erase Resume, Block Unlock confirm
Read Memory Array
29
and
30
for details on the information contained in the
Command
Appendix B: Common Flash interface
Command interface
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