M28W320CT09GB1T 데이터 시트보기 (PDF) - STMicroelectronics

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M28W320CT09GB1T

32 Mbit (2Mb x16, Boot Block) Low Voltage Flash Memory

STMicroelectronics 

M28W320CT, M28W320CB

Figure 12. Double Word Program Flowchart and Pseudo Code

Start

Write 30h

Command

Write Address 1

& Data 1 (3)

Write Address 2

& Data 2 (3)

Read Status

Register

NO

Suspend

YES

NO

b7 = 1

YES

Suspend

Loop

NO

b3 = 0

VPP Invalid

Error (1, 2)

YES

NO

b4 = 0

Program

Error (1, 2)

YES

b1 = 0

NO

Program to Protected

Block Error (1, 2)

YES

End

DPG instruction:

– write 30h command

– write Address 1 & Data 1 (3)

– write Address 2 & Data 2 (3)

(memory enters read status state after

the Program instruction)

do:

– read status register (E or G must be

toggled) if PES instruction given execute

DPG suspend loop

while b7 = 1

If b3 = 1, VPP invalid error:

– error handler

If b4 = 1, Program error:

– error handler

If b1 = 1, Program to protected block error:

– error handler

AI03539

Note: 1. Status check of b1 (Protected Block), b3 (VPP Invalid) and b4 (Program Error) can be made after each program operation or after

a sequence.

2. If an error is found, the Status Register must be cleared (CLRS instruction) before further P/E.C. operations.

3. Address 1 and Address 2 must be consecutive addresses differing only for address bit A0.

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