JS48F4400P0P3C0 datasheet(94/139 Pages) NUMONYX

94 / 139 page

Numonyx™ StrataFlash® Cellular Memory (M18)

Datasheet

April 2008

309823-10

The program or erase operation suspends at pre-determined points during the

operation after a delay of tSUSP. Suspend is achieved when SR[7,6] = 1 (erase-

suspend) or SR[7,2] = 1 (program-suspend).

Note:

Throughout the Block Erase Suspend or Program Suspend period, the addressed block

must remain unlocked and a valid voltage applied to VPP. Otherwise, the erase or

program operation will abort, setting the appropriate Status Register error bit(s). Also,

WP# must remain unchanged.

Asserting RST# aborts suspended block-erase and programming operations -- array

contents at the addressed locations are indeterminate. The addressed block should be

erased, and the data re-programmed.

Not all commands are allowed when the device is suspended. Table 44 shows which

device commands are allowed during Program Suspend or Erase Suspend.

During Suspend, reading from a block that is being erased or programmed is not

allowed. Also, programming to a block that is in erase-suspend state is not allowed,

and if attempted, will result in Status Register program error to be set (SR4 = 1).

A block-erase under program-suspend is not allowed. However, word-program under

erase-suspend is allowed, and can be suspended. This results in a simultaneous erase-

suspend/ program-suspend condition, indicated by SR[7,6,2] = 1.

To resume a suspended program or erase operation, issue the Resume command to

any device address. The read mode of the resumed partition is unchanged; issue the

Read Status Register command to return the partition to Read Status mode. The

operation continues where it left off, and the respective Status Register suspend bits

are cleared.

Table 43: Suspend and Resume Command Bus Cycles

Command

Setup Write Cycle

Confirm Write Cycle

Address Bus

Data Bus

Address Bus

Data Bus

Suspend

Device Address

00B0h

---

Resume

Device Address

00D0h

---

Table 44: Valid Commands During Suspend

Device Command

Program Suspend

Erase Suspend

Read Array

Allowed

Read Status Register

Allowed

Clear Status Register

Allowed

Read Device Information

Allowed

CFI Query

Allowed

Word Program

Not Allowed

Allowed

Buffered Program

Not Allowed

Allowed

Buffered Enhanced Factory Program

Not Allowed

Block Erase

Not Allowed

Program/Erase Suspend

Not Allowed

Program/Erase Resume

Allowed

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