M50FLW040AN5TP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M50FLW040AN5TP

4-Mbit (5 × 64 Kbyte blocks + 3 × 16 × 4 Kbyte sectors) 3-V supply Firmware Hub / low-pin count Flash memory

STMicroelectronics 

Flowcharts and pseudo codes

M50FLW040A, M50FLW040B

Appendix B Flowcharts and pseudo codes

Figure 21. 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)

FWH/LPC

Interface

Only

Read Status

Register

NO

Suspend

YES

NO

SR7 = 1

YES

Suspend

Loop

NO

SR3 = 0

VPP Invalid

Error (1, 2)

YES

NO

SR4 = 0

Program

Error (1, 2)

YES

NO

SR1 = 0

Program to Protected

Block Error (1, 2)

YES

End

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

If SR3 = 1,

– Enter the "VPP invalid" error handler

If SR4 = 1,

– Enter the "Program error" error handler

If SR1 = 1,

– Enter the "Program to protected

block" error handler

AI08425B

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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