S29PL-J55BAI011 datasheet(70/96 Pages) SPANSION

70 / 96 page

S29PL-J

S29PL-J_00_A9 September 22, 2006

Data

Sheet

(Adv an ce

Inf o r m a t io n)

16.7

DQ3: Sector Erase Timer

After writing a sector erase command sequence, the system may read DQ3 to determine whether or not

erasure has begun. (The sector erase timer does not apply to the chip erase command.) If additional sectors

are selected for erasure, the entire time-out also applies after each additional sector erase command. When

the time-out period is complete, DQ3 switches from a “0” to a “1.” See also the Sector Erase Command

Sequence on page 59.

After the sector erase command is written, the system should read the status of DQ7 (Data# Polling) or DQ6

(Toggle Bit I) to ensure that the device has accepted the command sequence, and then read DQ3. If DQ3 is

“1,” the Embedded Erase algorithm has begun; all further commands (except Erase Suspend) are ignored

until the erase operation is complete. If DQ3 is “0,” the device will accept additional sector erase commands.

To ensure the command has been accepted, the system software should check the status of DQ3 prior to and

following each subsequent sector erase command. If DQ3 is high on the second status check, the last

command might not have been accepted.

Table 16.1 shows the status of DQ3 relative to the other status bits.

Notes:

1. DQ5 switches to ‘1’ when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits. Refer to DQ5:

Exceeded Timing Limits on page 67 for more information.

2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further details.

3. When reading write operation status bits, the system must always provide the bank address where the Embedded Algorithm is in

progress. The device outputs array data if the system addresses a non-busy bank.

Table 16.1 Write Operation Status

Status

DQ7

(Note 2)

DQ6

DQ5

(Note 1)

DQ3

DQ2

(Note 2)

RY/BY#

Standard

Mode

Embedded Program

Algorithm

DQ7#

Toggle

N/A

No toggle

Embedded Erase

Algorithm

Toggle

Erase

Suspend

Mode

Erase

Suspend-

Read

Erase

Suspended

Sector

No toggle

N/A

Toggle

Non-Erase

Suspended

Sector

Data

Erase-Suspend

-Program

DQ7#

Toggle

N/A

Program

Suspend

Mode

(Note 3)

Reading within

Program

Suspended Sector

Invalid

(Not Allowed)

Invalid

(Not Allowed)

Invalid

(Not Allowed)

Invalid

(Not Allowed)

Invalid

(Not Allowed)

Reading within

Non-program

Suspended Sector

Data

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