M58WR032KU70ZA6U NUMONYX, M58WR032KU70ZA6U Datasheet - Page 28

• Manufacturer Part Number: M58WR032KU70ZA6U
• Description: NUMM58WR032KU70ZA6U NUM 32MB NOR FLASH P
• Manufacturer: NUMONYX

Command interface - Standard commands
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Block Lock command
The Block Lock command is used to lock a block and prevent Program or Erase operations
from changing the data in it. All blocks are locked at power-up or reset.
Two Bus Write cycles are required to issue the Block Lock command.
●
●
The lock status can be monitored for each block using the Read Electronic Signature
command.
The Block Lock bits are volatile, once set they remain set until a hardware reset or power-
down/power-up. They are cleared by a Block Unlock command. Refer to the section, Block
Locking, for a detailed explanation. See
flowchart and
Block Unlock command
The Block Unlock command is used to unlock a block, allowing the block to be programmed
or erased. Two Bus Write cycles are required to issue the Block Unlock command.
●
●
The lock status can be monitored for each block using the Read Electronic Signature
command.
Refer to the section, Block Locking, for a detailed explanation and
Locking operations flowchart and
command.
Block Lock-Down command
A locked or unlocked block can be locked-down by issuing the Block Lock-Down command.
A locked-down block cannot be programmed or erased, or have its protection status
changed when WP is low, V
and the locked blocks can be individually unlocked by the Block Unlock command.
Two Bus Write cycles are required to issue the Block Lock-Down command.
●
●
The lock status can be monitored for each block using the Read Electronic Signature
command. Locked-Down blocks revert to the locked (and not locked-down) state when the
device is reset on power-down.
Down command. Refer to the section, Block Locking, for a detailed explanation and
Appendix
using the Lock-Down command.
The first bus cycle sets up the Block Lock command.
The second Bus Write cycle latches the block address.
The first bus cycle sets up the Block Unlock command.
The second Bus Write cycle latches the block address.
The first bus cycle sets up the Block Lock command.
The second Bus Write cycle latches the block address.
C,
Table 17
Table 17
Figure 26: Locking operations flowchart and
pseudocode, for a flowchart for using the Lock command.
shows the Lock Status after issuing a Block Lock command.
shows the protection status after issuing a Block Unlock command.
IL
. When WP is high, V
Table 17
pseudocode, for a flowchart for using the Unlock
Appendix
shows the Lock Status after issuing a Block Lock-
C,
IH,
Figure 26: Locking operations
the Lock-Down function is disabled
pseudocode, for a flowchart for
M58WRxxxKU, M58WRxxxKL
Appendix
C,
Figure 26: