28F032B3 datasheet(15/48 Pages) INTEL

15 / 48 page

SMART 3 ADVANCED BOOT BLOCK

PRELIMINARY

Table 4. Command Codes and Descriptions (Continued)

Code

Device Mode

Description

Erase Confirm

Program / Erase

Resume

If the previous command was an Erase Set-Up command, then the CUI will

close the address and data latches, and begin erasing the block indicated on the

address pins. During erase, the device will only respond to the Read Status

data when CE# or OE# is toggled.

If a program or erase operation was previously suspended, this command will

resume that operation

Program / Erase

Suspend

Issuing this command will begin to suspend the currently executing

program/erase operation. The status register will indicate when the operation

has been successfully suspended by setting either the program suspend (SR.2)

or erase suspend (SR.6) and the WSM status bit (SR.7) to a “1” (ready). The

WSM will continue to idle in the SUSPEND state, regardless of the state of all

input control pins except RP#, which will immediately shut down the WSM and

the remainder of the chip if it is driven to VIL. See Sections 3.2.4.1 and 3.2.5.1.

Read Status

This command places the device into read status register mode. Reading the

device will output the contents of the status register, regardless of the address

presented to the device. The device automatically enters this mode after a

program or erase operation has been initiated. See Section 3.2.3.

Clear Status

The WSM can set the block lock status (SR.1) , V PP status (SR.3), program

status (SR.4), and erase status (SR.5) bits in the status register to “1,” but it

cannot clear them to “0.” Issuing this command clears those bits to “0.”

Read Identifier

Puts the device into the intelligent identifier read mode, so that reading the

device will output the manufacturer and device codes (A0 = 0 for manufacturer,

A0 = 1 for device, all other address inputs must be 0). See Section 3.2.2.

NOTE: See Appendix A for mode transition information.

3.2.2

READ IDENTIFIER

To read the manufacturer and device codes, the

device must be in read identifier mode, which can

be reached by writing the Read Identifier command

(90H). Once in read identifier mode, A0 = 0 outputs

the manufacturer’s identification code and A0 = 1

outputs the device identifier (see Table 5) Note:

A1—A21 = 0. To return to read array mode, write the

Read Array command (FFH).

Table 5. Read Identifier Table

Device Identifier

Size

Mfr. ID

-T

(Top Boot)

-B

(Bot. Boot)

28F400B3

0089H

8894H

8895H

28F008B3

0089H

28F800B3

8892H

8893H

28F016B3

0089H

28F160B3

8890H

8891H

28F032B3

0089H

28F320B3

8896

8897

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