JS28F256P30T85 datasheet(83/102 Pages) INTEL

83 / 102 page

1-Gbit P30 Family

Datasheet

Intel StrataFlash® Embedded Memory (P30)

April 2005

Order Number: 306666, Revision: 001

Notes:

"Illegal commands" include commands outside of the allowed command set (allowed commands: 40H [pgm], 20H [erase],

etc.)

If a "Read Array" is attempted from a busy partition, the result will be invalid data. The ID and Query data are located at

different locations in the address map.

1st and 2nd cycles of "2 cycles write commands" must be given to the same partition address, or unexpected results will

occur.

To protect memory contents against erroneous command sequences, there are specific instances in a multi-cycle

command sequence in which the second cycle will be ignored. For example, when the device is program suspended and

an erase setup command (0x20) is given followed by a confirm/resume command (0xD0), the second command will be

ignored because it is unclear whether the user intends to erase the block or resume the program operation.

Figure 39.

Write State Machine—Next State Table (Sheet 6 of 6)

OTP Busy

BP Busy,

Word Program

Busy,

Erase Busy,

BP Busy

BP Busy in Erase

Suspend

Word Pgm

Suspend,

Word Pgm Busy in

Erase Suspend,

Pgm Suspend In

Erase Suspend

BEFP Setup,

BEFP Pgm & Verify

Busy,

Erase Setup,

OTP Setup,

BP: Setup, Load 1,

Load 2, Confirm,

Word Pgm Setup,

Word Pgm Setup in

Erase Susp,

BP Setup, Load1,

Load 2, Confirm in

Erase Suspend

Current chip state

Ready,

Erase Suspend,

BP Suspend

Lock/CR Setup,

Lock/CR Setup in

Erase Susp

OTP

Setup

(4)

Lock

Block

Confirm

(8)

Lock-Down

Block

Confirm

(8)

Write CR

Confirm

(8)

Block Address

(?WA0)

Illegal Cmds or

BEFP Data

(1)

(C0H)

(01H)

(2FH)

(03H)

(FFFFH)

(all other codes)

WSM

Operation

Completes

Output does

not change.

Array

Read

Status Read

Array Read

Output does not

change.

Output does not change.

Status

Read

Status Read

Command Input to Chip and resulting Output Mux Next State

Output Next State Table

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