M50FLW040AN5T View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M50FLW040AN5T

4 Mbit (5 x 64KByte Blocks + 3 x 16 x 4KByte Sectors) 3V Supply Firmware Hub / Low Pin Count Flash Memory

STMicroelectronics 

M50FLW040A, M50FLW040B

APPENDIX B. FLOWCHARTS AND PSEUDO CODES

Figure 22. Program Flowchart and Pseudo Code

Start

Write 40h or 10h

Write Address

and Data

Program command:

– Write 40h or 10h

– Write Address and Data

(memory enters read status state after

the Program command)

Read Status

Register

NO

Suspend

NO

SR7 = 1

YES

YES

Suspend

Loop

do:

– Read Status Register

– If SR7=0 and a Program/Erase Suspend

command has been executed

– SR7 is set to 1

– Enter suspend program loop

NO

SR3 = 0

YES

VPP Invalid

Error (1, 2)

If SR3 = 1,

– Enter the "VPP invalid" error handler

FWH/LPC

Interface

Only

NO

SR4 = 0

YES

NO

SR1 = 0

YES

End

Program

Error (1, 2)

Program to Protected

Block Error (1, 2)

If SR4 = 1,

– Enter the "Program error" error handler

If SR1 = 1,

– Enter the "Program to protected

block" error handler

AI08425B

Note: 1. A Status check of SR1 (Protected Block), SR3 (VPP invalid) and SR4 (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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