S75WS256NDFBAWMB datasheet(48/216 Pages) SPANSION

48 / 216 page

S75WS256Nxx Based MCPs

S75WS-N-00_A0 February 17, 2005

Ad van c e

Inf o rmation

Figure 8.6 Write Operation Status Flowchart

START

DQ7=valid

data?

YES

DQ5=1?

YES

Write Buffer

Programming?

YES

Device BUSY,

Re-Poll

DQ1=1?

YES

DQ1=1

AND DQ7 ≠

Valid Data?

YES

(Note 4)

Write Buffer

Operation

Failed

DQ6

toggling?

YES

TIMEOUT

(Note 1)

(Note 3)

Programming

Operation?

DQ6

toggling?

YES

DQ2

toggling?

YES

Erase

Operation

Complete

Device in

Erase/Suspend

Mode

Program

Operation

Failed

DEVICE

ERROR

Erase

Operation

Complete

Read3=

valid data?

YES

Notes:

1) DQ6 is toggling if Read2 DQ6 does not equal Read3 DQ6.

2) DQ2 is toggling if Read2 DQ2 does not equal Read3 DQ2.

3) May be due to an attempt to program a 0 to 1. Use the RESET

command to exit operation.

4) Write buffer error if DQ1 of last read =1.

5) Invalid state, use RESET command to exit operation.

6) Valid data is the data that is intended to be programmed or all 1's for

an erase operation.

7) Data polling algorithm valid for all operations except advanced sector

protection.

Device BUSY,

Re-Poll

Device BUSY,

Re-Poll

Device BUSY,

Re-Poll

(Note 1)

(Note 2)

(Note 6)

(Note 5)

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