M28W640FCT70N6F NUMONYX, M28W640FCT70N6F Datasheet - Page 21
M28W640FCT70N6F
Manufacturer Part Number
M28W640FCT70N6F
Description
IC FLASH 64MBIT 70NS 48TSOP
Manufacturer
NUMONYX
Datasheet
1.M28W640FCB70ZB6F.pdf
(77 pages)
Specifications of M28W640FCT70N6F
Format - Memory
FLASH
Memory Type
FLASH - Nor
Memory Size
64M (4M x 16)
Speed
70ns
Interface
Parallel
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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M28W640FCT, M28W640FCB
4.13
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 Blocks Unlock command. Refer to the section, Block
Locking, for a detailed explanation.
The first bus cycle sets up the Block Lock command.
The second Bus Write cycle latches the block address.
Table 10
shows the protection status after issuing a Block Lock command.
Command interface
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