M29DW128F60ZA6E NUMONYX, M29DW128F60ZA6E Datasheet - Page 43

• Manufacturer Part Number: M29DW128F60ZA6E
• Description: IC FLASH 128MBIT 60NS 64TBGA
• Manufacturer: NUMONYX
• Series: Axcell™r

Specifications of M29DW128F60ZA6E

• Format - Memory: FLASH
• Memory Type: FLASH - Nor
• Memory Size: 128M (16Mx8, 8Mx16)
• Speed: 60ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M29DW128F
6.3.6
6.3.7
6.3.8
6.3.9
Password Verify command
The Password Verify Command is used to verify the Password used in Password Protection
mode. To verify the 64-bit Password, the complete command sequence must be entered
four times at four consecutive addresses selected by A1 to A0. If the Password Mode
Locking bit is programmed and the user attempts to verify the Password, the device will
output all F’s onto the I/O data bus. The Password is output regardless of the bank address.
The user must issue a Read/reset command to return the device to Read mode.
Dual operations are not allowed during a Password Verify operation.
Password Protection Unlock command
The Password Protection Unlock command is used to clear the Lock-Down bit in order to
unprotect all Non-Volatile Modify Protection bits when the device is in Password Protection
mode. The Password Protection Unlock command must be issued along with the correct
Password.
The complete command sequence must be entered for each 16 bits of the Password.
There must be a 2µs delay between successive Password Protection Unlock commands in
order to prevent hackers from cracking the Password by trying all possible 64-bit
combinations. If this delay is not respected, the latest command will be ignored.
Set Password Protection mode command
The Set Password Protection Mode command puts the device in Password Protection mode
by programming the Password Protection Mode Lock bit to ‘1’. This command can be issued
either with the Reset/Block Temporary Unprotect pin, RP, at V
Six cycles are required to issue a Set Password Protection Mode command:
1.
2.
3.
4.
There must be a 100µs delay between the fourth and fifth cycles.
Once the Password Protection mode is activated the device will permanently remain in this
mode.
Verify Password Protection mode command
The Verify Password Protection Mode command reads the status of the Password
Protection Mode Lock bit. If it is ‘1’, the device is in Password Protection mode.
The first two cycles are unlock cycles.
The third cycle issues the command.
The fourth and fifth cycles select the address (see
The last cycle verifies if the operation has been successful. If DQ0 is set to ’1’, the
device has successfully entered the Password Protection mode. If DQ0 is ‘0’, the
operation has failed and the command must be re-issued.
Table
34).
ID
or at V
Command interface
IH
.
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