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 

Figure 13. Program Flowchart and Pseudo Code

M50LPW012

Start

Write 40h or 10h

Write Address

& Data

LPC

Interface

Only

Read Status

Register

NO

Suspend

YES

NO

b7 = 1

YES

Suspend

Loop

NO

b4 = 0

Program

Error (1, 2)

YES

b1 = 0

NO

Program to Protected

Block Error (1, 2)

YES

End

Program command:

– write 40h or 10h

– write Address & Data

(memory enters read status state after

the 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

If b1 = 1, Program to protected block error:

– error handler

AI06818

Note: 1. A Status check of b1 (Protected Block) and 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.

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