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M29F016B

16 Mbit (2Mb x8, Uniform Block) Single Supply Flash Memory

STMicroelectronics 

M29F016B

Table 5. Commands

Bus Write Operations

Command

1st

2nd

3rd

4th

5th

6th

Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data

Read/Reset

1 X F0

3 555 AA 2AA 55 X F0

Auto Select

3 555 AA 2AA 55 555 90

Program

4 555 AA 2AA 55 555 A0 PA PD

Unlock Bypass

3 555 AA 2AA 55 555 20

Unlock Bypass

Program

2 X A0 PA PD

Unlock Bypass Reset 2 X 90 X 00

Chip Erase

6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10

Block Erase

6+ 555 AA 2AA 55 555 80 555 AA 2AA 55 BA 30

Erase Suspend

1 X B0

Erase Resume

1 X 30

Note: X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block.

All values in the table are in hexadecimal.

The Command Interface only uses address bits A0-A10 to verify the commands, the upper address bits are Don’t Care.

Read/Reset. After a Read/Reset command, read the memory as normal until another command is issued.

Auto Select. After an Auto Select command, read Manufacturer ID, Device ID or Block Protection Status.

Program, Unlock Bypass Program, Chip Erase, Block Erase. After these commands read the Status Register until the Program/Erase

Controller completes and the memory returns to Read Mode. Add additional Blocks during Block Erase Command with additional Bus Writ e

Operations until the Timeout Bit is set.

Unlock Bypass. After the Unlock Bypass command issue Unlock Bypass Program or Unlock Bypass Reset commands.

Unlock Bypass Reset. After the Unlock Bypass Reset command read the memory as normal until another command is issued.

Erase Suspend. After the Erase Suspend command read non-erasing memory blocks as normal, issue Auto Select and Program commands

on non-erasing blocks as normal.

Erase Resume. After the Erase Resume command the suspended Erase operation resumes, read the Status Register until the Program/

Erase Controller completes and the memory returns to Read Mode.

Unlock Bypass Command. The Unlock Bypass

command is used in conjunction with the Unlock

Bypass Program command to program the memo-

ry. When the access time to the device is long (as

with some EPROM programmers) considerable

time saving can be made by using these com-

mands. Three Bus Write operations are required

to issue the Unlock Bypass command.

Once the Unlock Bypass command has been is-

sued the memory will only accept the Unlock By-

pass Program command and the Unlock Bypass

Reset command. The memory can be read as if in

Read mode.

Unlock Bypass Program Command. The Unlock

Bypass Program command can be used to pro-

gram one address in memory at a time. The com-

mand requires two Bus Write operations, the final

write operation latches the address and data in the

internal state machine and starts the Program/

Erase Controller.

The Program operation using the Unlock Bypass

Program command behaves identically to the Pro-

gram operation using the Program command. A

protected block cannot be programmed; the oper-

ation cannot be aborted and the Status Register is

read. Errors must be reset using the Read/Reset

command, which leaves the device in Unlock By-

pass Mode. See the Program command for details

on the behavior.

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.

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