M28W320 STMicroelectronics, M28W320 Datasheet - Page 29

• Manufacturer Part Number: M28W320
• Description: 32 Mbit 2Mb x16/ Boot Block Low Voltage Flash Memory
• Manufacturer: STMicroelectronics

Figure 11. Program Flowchart and Pseudo Code
Note: 1. Status check of b1 (Protected Block), b3 (V
2. If an error is found, the Status Register must be cleared (CLRS instruction) before further P/E.C. operations.
a sequence.
Write 40h or 10h
Write Address
Read Status
Command
Register
& Data
b7 = 1
b3 = 0
b4 = 0
b1 = 0
Start
End
YES
YES
YES
YES
NO
NO
NO
NO
Suspend
Program to Protected
Block Error (1, 2)
NO
PP
V PP Invalid
Error (1, 2)
Error (1, 2)
Program
Invalid) and b4 (Program Error) can be made after each program operation or after
YES
Suspend
Loop
Program instruction:
– write 40h or 10h command
– write Address & Data
do:
– read status register (E or G must be
while b7 = 1
If b3 = 1, V PP invalid error:
– error handler
If b4 = 1, Program error:
– error handler
If b1 = 1, Program to protected block error:
– error handler
(memory enters read status state after
the Program instruction)
toggled) if PES instruction given execute
suspend program loop
M28W320CT, M28W320CB
AI03538
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