M50FW080NB5P datasheet(53/56 Pages) STMICROELECTRONICS

Part #	M50FW080NB5P

Description	8 Mbit 1Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory

PDF	56 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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53 / 56 page

M50FW080

Flowcharts and pseudo codes

53/55

Figure 22.

Block Erase flowchart and pseudo code

If an error is found, the Status Register must be cleared before further Program/Erase Controller

operations.

Write 20h/32h

AI08424B

Start

Write Block

Address and D0h

Read Status

YES

SR7 = 1

YES

SR3 = 0

SR4, SR5 = 0

VPP Invalid

Error (1)

Command

Sequence Error (1)

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

If SR3 = 1,

– Enter the "VPP invalid" error handler

If SR4, SR5 = 1,

– Enter the "Command sequence"error handler

YES

SR5 = 0

Erase Error (1)

YES

Suspend

Loop

If SR5 = 1,

– Enter the "Erase Error" error handler

End

YES

SR1 = 0

Erase to Protected

Block Error (1)

If SR1 = 1,

– Enter the "Erase to protected block"

error handler

YES

FWH/LPC

Interface

Only

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