M50FW002 データシートの表示（PDF） - STMicroelectronics

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M50FW002

2 Mbit (256Kb x8, Boot Block) 3V Supply Firmware Hub Flash Memory

STMicroelectronics 

M50FW002

Figure 14. Program Flowchart and Pseudo Code

Start

Write 40h or 10h

Write Address

& Data

FWH

Interface

Only

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

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 b3 = 1, VPP invalid error:

– error handler

If b4 = 1, Program error:

– error handler

If b1 = 1, Program to protected block error:

– error handler

AI03407

Note: 1. A Status check of b1 (Protected Block), b3 (VPP invalid) 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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