m58lw064a STMicroelectronics, m58lw064a Datasheet - Page 43

• Manufacturer Part Number: m58lw064a
• Description: 64 Mbit X16 And X16/x32, Block Erase Low Voltage Flash Memories
• Manufacturer: STMicroelectronics

Figure 22. Erase Flowchart and Pseudo Code
Note: 1. If an error is found, the Status Register must be cleared (CLRS instruction) before further P/E.C. operations.
Write Block Address
& D0h Command
Read Status
Command
b4, b5 = 0
Write 20h
Register
b7 = 1
b3 = 0
b5 = 0
b1 = 0
Start
End
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Suspend
Erase to Protected
Sequence Error
V PP Invalid
Block Error
Command
NO
Error (1)
Error (1)
Erase
YES
Suspend
Loop
EE instruction:
– write 20h command
– write Block Address
(memory enters read status
state after the EE instruction)
do:
– read status register
if EE instruction given execute
suspend erase loop
while b7 = 1
If b3 = 1, V PP invalid error:
– error handler
If b4, b5 = 1, Command Sequence error:
– error handler
If b5 = 1, Erase error:
– error handler
If b1 = 1, Erase to Protected Block Error:
– error handler
(A12-A17) & command D0h
(E or G must be toggled)
M58LW064A, M58LW064B
AI00613B
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