M29DW128F datasheet(36/93 Pages) STMICROELECTRONICS

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6 Command Interface

M29DW128F

36/93

6.2.10 Unlock Bypass Program command

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.

6.2.11 Unlock Bypass Reset command

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 13.

Fast Program Commands, 8-bit mode

Command

Bus Write Operations(1)

X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block, BKA Bank Address, WBL Write Buffer Location. All

values in the table are in hexadecimal.

1st

2nd

3rd

4th

5th

6th

7th

8th

9th

Add

Data

Add

Data

Add

Data

Add

Data

Add

Data

Add

Data

Add

Data

Add

Data

Add

Data

Write to Buffer

and Program

AAA

555

N(2)

The maximum number of cycles in the command sequence is 37. N+1 is the number of Words to be programmed during the Write to Buffer

and Program operation.

(3)

Each buffer has the same A5-A22 addresses. A0-A4 are used to select a Word within the N+1 Word page.

WBL

(4)

The 6th cycle has to be issued N time. WBL scans the Word inside the page.

Write to Buffer

and Program

Abort and

Reset

AAA

555

AAA

Write to Buffer

and Program

Confirm

(5)

BA must be identical to the address loaded during the Write to buffer and Program 3rd and 4th cycles.

Double Byte

Program

AAA

PA0

PD0

PA1

PD1

Quadruple Byte

Program

AAA

PA0

PD0

PA1

PD1

PA2

PD2

PA3

PD3

Octuple Byte

Program

AAA

PA0

PD0

PA1

PD1

PA2

PD2

PA3

PD3

PA4

PD4

PA5

PD5

PA6

PD6

PA7

PD7

Unlock Bypass

AAA

555

AAA

Unlock Bypass

Program

Unlock Bypass

Reset

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