JS48F4400P0P3C0 datasheet(111/139 Pages) NUMONYX

111 / 139 page

April 2008

Datasheet

309823-10

111

Numonyx™ StrataFlash® Cellular Memory (M18)

12.2

Block Status Register

The Block Status Register indicates whether an erase operation completed successfully

or whether a given block is locked or can be accessed for flash program/erase

operations.

Block Erase Status (BSR[1]) allows system software to determine the success of the

last block erase operation. BSR[1] can be used just after power-up to verify that the

VCC supply was not accidentally removed during an erase operation. Only issuing

another operation to the block resets this bit. The Block Status Register is accessed

from word address 02h within each block.

12.3

CFI Query Identification String

The Identification String provides verification that the component supports the

Common Flash Interface specification. It also indicates the specification version and

supported vendor-specified command set(s).

00015h

PLO

PrVendor

00015h

P_IDHI

ID#

00016h

PHI

TblAdr

00016h

00017h

A_IDLO

AltVendor

00017h

00018h

A_IDHI

ID#

00018h

Table 50: Example of Query Structure Output of x16 Devices (Sheet 2 of 2)

Word Addressing

Byte Addressing

Offset

Hex Code

Value

Offset

Hex Code

Value

AX - A0

A15 - A0

AX - A0

A7 - A0

Table 51: Block Status Register

Offset

Length

Description

Address

Value

(BA + 2)h

Block Lock Status Register

BA + 2

-00 or -01

(BA + 2)h

BSR.0 Block Lock Status:

0 = Unlocked

1 = Locked

BA + 2

(bit 0): 0 or 1

(BA + 2)h

BSR.1 Block Lock Down Status:

0 = Not Locked Down

1 = Locked Down

BA + 2

(bit 0): 0 or 1

(BA + 2)h

BSR.2-3, 6-7: Reserved for future use

BA + 2

(bit 0): 0 or 1

Note:

BA = The beginning of a Block Address; that is, 020000h is the beginning location in word mode of the 256-KB block 1.

Table 52: CFI Identification (Sheet 1 of 2)

Offset

Length

Description

Address

Hex Code

Value

10h

Query unique ASCII string “QRY”

--51

“Q”

--52

“R”

--59

“Y”

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