MITSUBISHI LSIs

16,777,216-BIT (1048,576-WORD BY16-BIT)

CMOS 3.3V-ONLY, BLOCK ERASE FLASH MEMORY

M5M29GB/T161BWG

Sep.1999. Rev4.0

9

BLOCK LOCKING

WP1# & WP2# pins must not be switched during performing Erase / Write operations or WSM Busy (WSMS = 0).

2) Erase/Write command for locked blocks is aborted. At this time read mode is not array read mode but status read mode and

00B0H is read. Please issue Clear Status Register command plus Read Array command to change the mode from status read mode

to array read mode.

STATUS REGISTER

Status

Erase Status

Program Status

Definition

Symbol

Write State Machine Status

"1"

"0"

Ready

Busy

Suspended

Operation in Progress / Completed

Error

Successful

Error

Successful

SR.5

SR.4

SR.7

SR.6

SR.1

SR.0

SR.3

SR.2

Block Status after Program

Reserved

-

Suspend Status

Error

Successful

-

*DQ3 indicates the block status after the page programming, byte/word programming and page buffer to flash. When DQ3 is "1", the page has the

over-programed cell . If over-program occurs, the device is block fail. However if DQ3 is "1", please try the block erase to the block. The block may revive.

Reserved

Reserved

--

--

Deep Power Down Mode

Write Protection Provided

Locked

RP#

WP1#

WP2#

XX

Lock

Bit

(Internally)

X

BANK(I)

Lock Bit

Boot

Parameter

Data

Locked

Locked

Locked

Note

All Blocks Locked

All Blocks Unlocked

0

1

X

X

0

1

Locked

Locked

Unlocked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Locked

Unlocked Unlocked Unlocked

Locked

Locked

Locked

Unlocked Unlocked

Locked

Unlocked

Locked

Locked

Only Parameter Block is Unlocked

BANK(II)

161BWG