MX28F640C3T Macronix International, MX28F640C3T Datasheet - Page 35

• Manufacturer Part Number: MX28F640C3T
• Description: 64M-BIT [4M x16] CMOS SINGLE VOLTAGE 3V ONLY FLASH MEMORY
• Manufacturer: Macronix International

Figure 10. Locking Operations Flowchart
P/N:PM0900
Read Sector Lock Status
Write FFh (Read Array)
(Read Configuration)
(Configuration Setup)
01H, D0H, or 2FH
Locking Change
Locking Change
Confirmed ?
Write 90H
Complete
Write 60H
Write
Start
Yes
No
35
Bus
Operation
Write
Write
Write
(Optional)
Read
(Optional)
Stanby
MX28F640C3T/B
Command
Config. Setup Data=60H
Lock, unlock Data=01H (Sector Lock)
or Lockdown
Read
Configuration Addr=X
Sector Lock Sector Lock Status Data
Status
Comments
Addr=X
Addr=Within sector to lock
Data=90H
Addr=Second addr of
sector
Confirm Locking Change
on Q1, Q0 (See Sector
Locking State Table for
valid combinations.)
2FH(Sector Lockdown)
D0H(Sector Unlock)
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REV. 0.6, AUG. 20, 2003