256Mb and 512Mb (256Mb/256Mb), P30-65nm
Device Command Codes
Table 10: Command Codes and Definitions (Continued)
Mode
Code
Device Mode
Description
Erase
0x20
Block Erase Setup
First cycle of a 2-cycle command; prepares the CUI for a block-erase op-
eration. The device performs the erase algorithm on the block ad-
dressed by the Erase Confirm command. If the next command is not the
Erase Confirm (0xD0) command, the CUI sets Status Register bits SR.4
and SR.5, and places the device in read status register mode.
0xD0
0xB0
Block Erase Confirm If the first command was Block Erase Setup (0x20), the CUI latches the
address and data, and the device erases the addressed block. During
block-erase operations, the device responds only to Read Status Regis-
ter and Erase Suspend commands. CE# or OE# must be toggled to up-
date the Status Register in asynchronous read. CE# or ADV# must be
toggled to update the Status Register Data for synchronous Non-array
reads.
Suspend
Program or Erase
Suspend
This command issued to any device address initiates a suspend of the
currently-executing program or block erase operation. The Status Reg-
ister indicates successful suspend operation by setting either SR.2 (pro-
gram suspended) or SR.6 (erase suspended), along with SR.7 (ready).
The Write State Machine remains in the suspend mode regardless of
control signal states (except for RST# asserted).
0xD0
0x60
Suspend Resume
Block lock Setup
This command issued to any device address resumes the suspended
program or block-erase operation.
Block Locking/
Unlocking
First cycle of a 2-cycle command; prepares the CUI for block lock config-
uration changes. If the next command is not Block Lock (0x01), Block
Unlock (0xD0), or Block Lock-Down (0x2F), the CUI sets Status Register
bits SR.5 and SR.4, indicating a command sequence error.
0x01
0xD0
Block lock
If the previous command was Block Lock Setup (0x60), the addressed
block is locked.
Block Unlock
If the previous command was Block Lock Setup (0x60), the addressed
block is unlocked. If the addressed block is in a lock-down state, the
operation has no effect.
0x2F
Block Lock-Down
If the previous command was Block Lock Setup (0x60), the addressed
block is locked down.
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