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

Figure 26. Chip Erase Flowchart and Pseudo Code (A/A Mux Interface Only)

Start

Write 80h

Write 10h

Read Status

Register

Chip Erase command:

– write 80h

– write 10h

(memory enters read Status Register after

the Chip Erase command)

do:

– read Status Register

NO

SR7 = 1

YES

NO

SR3 = 0

YES

NO

SR4, SR5 = 0

YES

NO

SR5 = 0

YES

End

VPP Invalid

Error (1)

Command

Sequence Error (1)

Erase Error (1)

while SR7 = 0

If SR3 = 1, VPP invalid error:

– error handler

If SR4, SR5 = 1, Command sequence error:

– error handler

If SR5 = 1, Erase error:

– error handler

AI08428B

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

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