M50LPW012 データシートの表示（PDF） - STMicroelectronics

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M50LPW012

2 Mbit (256Kb x8, Boot Block) 3V Supply Low Pin Count Flash Memory

STMicroelectronics 

M50LPW012

Figure 14. Quadruple Byte Program Flowchart and Pseudo Code (A/A Mux Interface Only)

Start

Write 30h

Write Address 1

& Data 1 (3)

Write Address 2

& Data 2 (3)

Write Address 3

& Data 3 (3)

Write Address 4

& Data 4 (3)

Read Status

Register

NO

Suspend

NO

b7 = 1

YES

YES

Suspend

Loop

NO

b4 = 0

YES

End

Program

Error (1, 2)

Quadruple Byte Program command:

– write 30h

– write Address 1 & Data 1 (3)

– write Address 2 & Data 2 (3)

– write Address 3 & Data 3 (3)

– write Address 4 & Data 4 (3)

(memory enters read status state after

the Quadruple Byte Program command)

do:

– read Status Register if Program/Erase

Suspend command given execute

suspend program loop

while b7 = 1

If b4 = 1, Program error:

– error handler

AI06819

Note: 1. A Status check of b4 (Program Error) can be made after each Program operation by following the correct command sequence.

2. If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.

3. Address 1, Address 2, Address 3 and Address 4 must be consecutive addresses differing only for address bits A0 and A1.

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