E
SMART 3 ADVANCED BOOT BLOCK
Table 4. Command Codes and Descriptions (Continued)
Description
Code Device Mode
D0
Erase Confirm 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
Register and Erase Suspend commands. The device will output status register
data when CE# or OE# is toggled.
Program / Erase If a program or erase operation was previously suspended, this command will
Resume
resume that operation
B0 Program / Erase Issuing this command will begin to suspend the currently executing
Suspend
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.
70
Read Status
Register
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.
50
90
Clear Status
Register
The WSM can set the block lock status (SR.1) , VPP 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.
Table 5. Read Identifier Table
Device Identifier
-T -B
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:
Size
Mfr. ID
(Top Boot) (Bot. Boot)
28F400B3
28F008B3
28F800B3
28F016B3
28F160B3
28F032B3
28F320B3
0089H
0089H
8894H
D2
8895H
D3
A
1—A21 = 0. To return to read array mode, write the
Read Array command (FFH).
8892H
D0
8893H
D1
0089H
0089H
8890H
D6
8891H
D7
8896
8897
15
PRELIMINARY
INTEL [ INTEL ]
