M29DW641F70N1 NUMONYX [Numonyx B.V], M29DW641F70N1 Datasheet - Page 32

• Manufacturer Part Number: M29DW641F70N1
• Description: 64 Mbit (4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
• Manufacturer: NUMONYX [Numonyx B.V]

Command interface
6.2.3
The Unlock Bypass command is used in conjunction with the Unlock Bypass Program command to
program the memory faster than with the standard program commands. When the cycle time to the
device is long, considerable time saving can be made by using these commands. Three Bus Write
Operations are required to issue the Unlock Bypass command.
Once the Unlock Bypass command has been issued the bank enters Unlock Bypass mode. When in
Unlock Bypass mode, only the Unlock Bypass Program and Unlock Bypass Reset commands are valid.
The Unlock Bypass Program command can then be issued to program addresses within the bank, or the
Unlock Bypass Reset command can be issued to return the bank to Read mode. In Unlock Bypass mode
the memory can be read as if in Read mode.
6.2.4
The Unlock Bypass Program command can be used to program one address in the memory array at a
time. The command requires two Bus Write Operations, the final Write Operation latches the address
and data and starts the Program/Erase Controller.
The Program Operation using the Unlock Bypass Program command behaves identically to the Program
Operation using the Program command. The operation cannot be aborted, a Bus Read Operation to the
Bank where the command was issued outputs the Status Register. See the Program command for details
on the behavior.
6.2.5
The Unlock Bypass Reset command can be used to return to Read/Reset mode from Unlock Bypass
mode. Two Bus Write Operations are required to issue the Unlock Bypass Reset command. Read/Reset
command does not exit from Unlock Bypass mode.
Table 9.
1. The sequence consisting in 555 AA 2AA 55 X 25 is reserved and must not be issued.
2. X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block, BKA Bank Address, WBL Write Buffer
32/80
Double Word Program
Quadruple Word Program
Unlock Bypass
Unlock Bypass Program
Unlock Bypass Reset
Location. All values in the table are in hexadecimal.
Command
Unlock Bypass command
Unlock Bypass Program command
Unlock Bypass Reset command
Fast Program commands
(1)
3
5
3
2
2
Add Data Add Data
555
555
555
X
X
1st
AA
50
56
A0
90
2AA
PA0 PD0
PA0 PD0
PA
X
2nd
PD
55
00
Bus Write Operations
Add
PA1
PA1
555
3rd
Data Add Data Add Data Add Data
PD1
PD1 PA2 PD2 PA3 PD3
20
4th
(2)
5th
M29DW641F
6th