28F6408W30, 28F3208W30, 28F3204W30, 28F320W30
10 Preliminary
partition X will be erased. Alternatively, if the Erase Confirm command is given to partition Y, the
command will still be executed, and a b lock in partition Y will b e eras ed. Any other command
given to ANY partition prior to the Erase Confirm command will result in a command sequence
error , which is posted in the status register. After the erase has successfully started in partition X or
Y, read cycles can occur in any other partition.
Table 4. Command Code and Descriptions (Sheet 1 of 2)
Mode
Instruction
Code Command Description
Read
FFh Read Array Places addressed partition in read array mode.
70h Read S tatus
Register Places addressed partition in read status register mode. A partition automatically enters the
read status register mode after a valid Program/Erase command is executed.
90h Read ID Register ,
Read Configuration
Register
Puts the addressed partition in read device identifier mode. The device outputs
manufacturer and device ID codes, configuration register settings, block lock status and
protection register data. Data is output on DQ15-0.
98h Read Query
Register Puts the addressed partition in read query mode. The device outputs Common Flash
Interface (CFI) information on DQ7-0.
50h Clear Status
Register Clears status register bits 1, 3, 4 and 5. The WSM can set (1) and reset (0) bits 0, 2, 6 and 7.
Program
40h Word Program
Setup
The preferred first bus cycle program command that prepares the WSM for a program
operation. The second bus cycle command latches the address and data. A Read Array
command is required to read array data after programming.
10h Alternate Word
Program Setup Equivalent to a Word Program Setup command (40h).
30h Enhanced Factory
Programming
Setup
Activates Enhanced Factory Programming mode (EFP). The first bus cycle sets up the
command. If the second bus cycle is a Confirm command (D0h), subsequent writes provide
program data. All other commands are ignored once EFP mode begins.
D0h Enhanced Factory
Programming
Confirm
If the first command was Enhanced Factory Programming Setup (30h), the CUI latches the
address, confirms command data, and prepares the device for EFP mode.
Erase
20h Block Erase Setup
Prepares the WSM for a block erase operation. The device erases the block addressed by
the Erase Confirm command. If the next command is not Erase Confirm, the CUI
(a) sets status register bits SR.4 and SR.5 to “1,”
(b) places the partition in the read status register mode
(c) waits for another command.
D0h Erase Confirm
If the first command was Erase Setup (20h), the WSM latches address and data and erases
the block indicated by the erase confirm cycle address. During program/erase, the partition
responds only to Read St atus Register, Program Suspend, and Erase Suspend commands.
CE# or OE# toggle updates status register data.
Suspend
B0h Program or
Erase Suspend
This command issued at any device address initiates suspension of the currently executing
program/erase operation. The status register, invoked by a Read St atus Register command,
indicates successful operation suspension by setting (1) status bits SR.2 (program suspend)
or SR.6 (erase suspend) and SR.7. The WSM remains in the suspend mode regardless of
control signal states, except RST# = VIL.
D0h Suspend Resume This command issued at any device address resumes suspended program or erase
operation.
Block Locking
60h Lock Setup Prepares the WSM lock configuration. If the next command is not Block-Lock, Unlock, or
Lock-D own the WSM sets SR.4 and SR.5 to indicate command sequence error.
01h Lock Block If the previous command was Lock Setup (60h), the CUI locks the addressed block.
D0h Unlock Block After a Lock Setup (60h) command the CUI latches the address and unlocks the addressed
block. If previously Locked-down, the operation has no effect.
2Fh Lock-Down After a Lock Setup (60h) command, the CUI latches the address and locks-down the
addressed block.