JS28F512P30TFA datasheet(34/86 Pages) MICRON

34 / 86 page

P30-65nm

Datasheet

Sept 2012

Order Number: 208042-0

11.0

When non-array reads are performed in asynchronous page mode, only the first data is

valid and all subsequent data are undefined. When a non-array read operation occurs

as synchronous burst mode, the same word of data requested will be output on

successive clock edges until the burst length requirements are satisfied.

11.1

Status Register (SR)

The Status Register provides the ready/busy information of the device, as well as the

error information about the program, erase, VPP and block-locked operations. please

refer to Section 7.4, “Read Status Register” on page 23 and Section 7.5, “Clear Status

Notes:

Always clear the Status Register prior to resuming erase operations. It avoids Status Register ambiguity when issuing

commands during Erase Suspend. If a command sequence error occurs during an erase-suspend state, the Status Register

contains the command sequence error status (SR[7,5,4] set). When the erase operation resumes and finishes, possible

errors during the erase operation cannot be detected via the Status Register because it contains the previous error status

BEFP mode is only valid in array.

Table 12: Status Register Description

Status Register (SR)

Default Value = 0x80

Device Write

Status

Erase Suspend

Status

Erase Status

Program

Status

VPP Status

Program

Suspend

Status

Block-Locked

Status

BEFP

Write

Status

DWS

ESS

VPPS

PSS

BLS

BWS

321

Bit

Name

Description

Device Write Status (DWS)

0 = Device is busy; program or erase cycle in progress; SR.0 valid.

1 = Device is ready; SR[6:1] are valid.

Erase Suspend Status (ESS)

0 = Erase suspend not in effect.

1 = Erase suspend in effect.

Erase Status

(ES)

Command

Sequence

Error

SR.5

SR.4

Description

Program

Status (PS)

Program or Erase operation successful.

Program error - operation aborted.

Erase error - operation aborted.

Command sequence error - command aborted.

VPP Status (VPPS)

0 = VPP within acceptable limits during program or erase operation.

1 = VPP

≤ VPPLK during program or erase operation.

Program Suspend Status (PSS)

0 = Program suspend not in effect.

1 = Program suspend in effect.

Block-Locked Status (BLS)

0 = Block not locked during program or erase.

1 = Block locked during program or erase; operation aborted.

0BEFP Write Status (BWS)

After Buffered Enhanced Factory Programming (BEFP) data is loaded into the

buffer:

0 = BEFP complete.

1 = BEFP in-progress.

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