M28W320 STMicroelectronics, M28W320 Datasheet - Page 30

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

M28W320CT, M28W320CB
Figure 12. Double Word Program Flowchart and Pseudo Code
Note: 1. Status check of b1 (Protected Block), b3 (V
30/42
2. If an error is found, the Status Register must be cleared (CLRS instruction) before further P/E.C. operations.
3. Address 1 and Address 2 must be consecutive addresses differing only for address bit A0.
a sequence.
Write Address 1
Write Address 2
Read Status
& Data 1 (3)
& Data 2 (3)
Command
Write 30h
Register
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
DPG instruction:
– write 30h command
– write Address 1 & Data 1 (3)
– write Address 2 & Data 2 (3)
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
DPG suspend loop
AI03539