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 24. Quadruple Byte Program Flowchart and Pseudo Code (A/A Mux Interface Only)

Start

Write 30h

Write Address 1

& Data 1 (3)

Write Address 2

& Data 2 (3)

Write Address 3

& Data 3 (3)

Quadruple Byte Program command:

– write 30h

– write Address 1 & Data 1 (3)

– write Address 2 & Data 2 (3)

– write Address 3 & Data 3 (3)

– write Address 4 & Data 4 (3)

(memory enters read status state after

the Quadruple Byte Program command)

Write Address 4

& Data 4 (3)

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

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, VPP invalid error:

– error handler

If SR4 = 1, Program error:

– error handler

AI08437B

Note: 1. A Status check of 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.

3. Address1, Address 2, Address 3 and Address 4 must be consecutive addresses differing only for address bits A0 and A1.

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