JS28F128P30TF75A datasheet(34/90 Pages) MICRON

34 / 90 page

P30-65nm SBC

Datasheet

Apr 2010

Order Number: 208033-02

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

11.2

Read Configuration Register (RCR)

The RCR is a 16-bit read/write register used to select bus-read mode (synchronous or

asynchronous), and to configure synchronous burst read characteristics of the device.

To modify RCR settings, use the Configure Read Configuration Register command (see

Section 6.2, “Device Command Bus Cycles” on page 20).

Table 12: Status Register Description

Status Register (SR)

Default Value = 0x80

Device

Ready

Status

Erase Suspend

Status 1

1. Always clear the Status Register before resuming erase operations afer an Erase Suspend command; this prevents ambiguity in

Status Register information. For example, 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 deteted via the Stauts Register because it contains the previous error status.

Erase Status Program Status

VPP Status

Program

Suspend Status

Block-Locked

Status

BEFP Write

Status

DRS

ESS

VPPS

PSS

BLS

BWS

Bit

Name

Description

Device Ready Status

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

0 = Erase suspend not in effect.

1 = Erase suspend in effect.

5Erase Status

Command

Sequence

Error

SR.5

SR.4

Description

Program Status

Program or Erase operation successful.

Program error - operation aborted.

Erase error - operation aborted.

Command sequence error - command aborted.

VPP Status

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

1 = VPP < VPPLK during program or erase operation.

Program Suspend Status

0 = Program suspend not in effect.

1 = Program suspend in effect.

Block-Locked Status

0 = Block not locked during program or erase.

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

0BEFP Write Status 2

2. BEFP mode is only valid in array.

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

buffer:

0 = BEFP complete.

1 = BEFP in-progress.

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