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 

Figure 27. Sector/Block Erase Flowchart and Pseudo Code

Start

M50FLW040A, M50FLW040B

Write 20h/32h

Write Block

Address and D0h

Read Status

Register

NO

SR7 = 1

NO

Suspend

YES

Suspend

Loop

Block Erase command:

– Write 20h/32h

– Write block Address and D0h

(memory enters read Status Register after

the Block Erase command)

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

FWH/LPC

Interface

Only

YES

NO

SR3 = 0

YES

NO

SR4, SR5 = 0

YES

NO

SR5 = 0

YES

NO

SR1 = 0

YES

End

VPP Invalid

Error (1)

Command

Sequence Error (1)

Erase Error (1)

Erase to Protected

Block Error (1)

If SR3 = 1,

– Enter the "VPP invalid" error handler

If SR4, SR5 = 1,

– Enter the "Command sequence"error handler

If SR5 = 1,

– Enter the "Erase Error" error handler

If SR1 = 1,

– Enter the "Erase to protected block"

error handler

AI08424B

Note: 1. If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.

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