JS48F4400P0P3C0 datasheet(88/139 Pages) NUMONYX

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Numonyx™ StrataFlash® Cellular Memory (M18)

Datasheet

April 2008

309823-10

9.6

Programming Operations

Programming the flash array changes ‘ones’ to ‘zeros’. To change zeros to ones, an

Erase operation must be performed. Only one programming operation can occur at a

time. Programming is permitted during Erase Suspend.

Information is programmed into the flash array by issuing the appropriate command.

Table 39, “Programming Commands Bus Cycles” shows the two-cycle command

sequences used for programming.

Caution:

All programming operations require the addressed block to be unlocked, and a

valid VPP voltage applied throughout the programming operation. Otherwise,

the programming operation will abort, setting the appropriate Status Register

error bit(s).

The following sections describe each programming method.

9.6.1

Single-Word Programming

Main array programming is performed by first issuing the Single-Word Program

command. This is followed by writing the desired data at the desired array address. The

read mode of the addressed partition is automatically changed to Read Status Register

mode, which remains in effect until another read-mode command is issued.

Table 38: Programming Region Next State Table

Current State of

Programming

Region

Command Issued

0041h to B-half

(A3 = 1)

0041h to A-half

(A3 = 0)

00E9h to B-half

(A3 = 1)

00E9h to A-half

(A3 = 0)

Erased

Program Fail; Illegal

Command

SR[4,8,9] = 1

Program Successful

SR[4,8,9] = 0

Region configured to

Control Mode

Program Successful

SR[4,8,9] = 0

Region configured to

Object Mode

Program Successful

SR[4,8,9] = 0

Region configured to

Control Mode

Program Successful

SR[4,8,9] = 0

Program Fail;

Object data to Control

mode region

SR[4,9] = 1

SR8 = 0

Program Successful

SR[4,8,9] = 0

Object Mode

Program Fail; Rewrite to Object mode region

SR[4,8] = 1

SR9 = 0

Table 39: Programming Commands Bus Cycles

Command

Setup Write Cycle

Confirm Write Cycle

Address Bus

Data Bus

Address Bus

Data Bus

Single-Word Program

Device Address

0041h

Device Address

Array Data

Buffered Program

Device Address

00E9h

Device Address

00D0h

Buffered Enhanced Factory Program

Device Address

0080h

Device Address

00D0h

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