28F128W18 datasheet(21/100 Pages) INTEL

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Intel® Wireless Flash Memory (W18)

Datasheet

Table 5.

Command Codes and Descriptions (Sheet 1 of 2)

Operation

Code

Device

Command

Description

Read

FFh

Read Array

Places selected partition in read-array mode.

70h

Read Status

Places selected partition in status register read mode. The partition enters this

mode after a Program or Erase command is issued to it.

90h

Read Identifier

Puts the selected partition in read identifier mode. Device reads from partition

addresses output manufacturer/device codes, configuration register data, block

lock status, or protection register data on D[15:0].

98h

Read Query

Puts the addressed partition in read query mode. Device reads from the partition

addresses output CFI information on D[7:0].

50h

Clear Status

TheWSM canset thestatusregister’sblock lock (SR[1]), VPP (SR[3]), program

(SR[4]), and erase (SR[5]) status bits, but it cannot clear them. SR[5:3,1] can

only be cleared by a device reset or through the Clear Status Register command.

Program

40h

Word Program

Setup

This preferred program command’s first cycle prepares the CUI for a program

operation. The second cycle latches address and data, and executes the WSM

program algorithm at this location. Status register updates occur when CE# or

OE# is toggled. A Read Array command is required to read array data after

programming.

10h

Alternate Setup

Equivalent to a Program Setup command (40h).

30h

EFP Setup

This program command activates EFP mode. The first write cycle sets up the

command. If the second cycle is an EFP Confirm command (D0h), subsequent

writes provide program data. All other commands are ignored after EFP mode

begins.

D0h

EFP Confirm

If the first command was EFP Setup (30h), the CUI latches the address and data,

and prepares the device for EFP mode.

Erase

20h

Erase Setup

This command prepares the CUI for Block Erase. The device erases the block

addressed by the Erase Confirm command. If the next command is not Erase

Confirm, the CUI sets status register bits SR[5:4] to indicate command sequence

error and places the partition in the read status register mode.

D0h

Erase Confirm

If the first command was Erase Setup (20h), the CUI latches address and data,

and erases the block indicated by the erase confirm cycle address. During

program or erase, the partition responds only to Read Status Register, Program

Suspend, and Erase Suspend commands. CE# or OE# toggle updates status

Suspend

B0h

Program

Suspend or

Erase Suspend

This command, issued at any device address, suspends the currently executing

program or erase operation. Status register data indicates the operation was

successfully suspended if SR[2] (program suspend) or SR[6] (erase suspend)

and SR[7] are set. The WSM remains in the suspended state regardless of

control signal states (except RST#).

D0h

Suspend

Resume

This command, issued at any device address, resumes the suspended program

or erase operation.

Block Locking

60h

Lock Setup

This command prepares the CUI lock configuration. If the next command is not

Lock Block, Unlock Block, or Lock-Down, the CUI sets SR[5:4] 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

If the previous command was Lock Setup (60h), the CUI latches the address and

unlocks the addressed block. If previously locked-down, the operation has no

effect.

2Fh

Lock-Down

If the previous command was Lock Setup (60h), the CUI latches the address and

locks-down the addressed block.

28F128W18 Datasheet(PDF) 21 Page - Intel Corporation

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