RC28F320C3TD90 Micron Technology Inc, RC28F320C3TD90 Datasheet - Page 61

• Manufacturer Part Number: RC28F320C3TD90
• Manufacturer: Micron Technology Inc

Specifications of RC28F320C3TD90

• Lead Free Status / Rohs Status: Not Compliant

C3 Discrete
Figure 22: Protection Register Programming Flowchart
March 2008
290645-24
Address & Data
SR[3], SR[4] =
SR[3], SR[4] =
SR[3], SR[4] =
Register Data
Read Status
Read Status
PR Address
Write 0xC0,
Successful
Full Status
(if desired)
Complete
Write PR
Program
Program
Register
SR[7] =
Check
Start
1
0
0
0
0
1
1
1
(Program Setup)
(Confirm Data)
PROTECTION REGISTER PROGRAMMING PROCEDURE
Register Locked;
Program Aborted
V
Program Error
P P
Range Error
FULL STATUS CHECK PROCEDURE
Operation Command
Program Protection Register operation addresses must be
within the Protection Register address space. Addresses
outside this space will return an error.
Repeat for subsequent programming operations.
Full Status Register check can be done after each program, or
after a sequence of program operations.
Write 0xFF after the last operation to set Read Array state.
Operation
SR[3] must be cleared before the Write State Machine will
allow further program attempts.
Only the Clear Staus Register command clears SR[1, 3, 4].
If an error is detected, clear the Status register before
attempting a program retry or other error recovery.
Write
Write
Read
Bus
Bus
Idle
Idle
Idle
Idle
Command
Protection
PR Setup
Program
Program
None
None
None
None
None
Data = 0xC0
Addr = First Location to Program
Data = Data to Program
Addr = Location to Program
Status Register Data. Toggle CE# or
OE# to Update Status Register Data
Check SR[7]:
1 = WSM Ready
0 = WSM Busy
Check SR[1], SR[3], SR[4]:
0,1,1 = V
Check SR[1], SR[3], SR[4]:
0,0,1 = Programming Error
Check SR[1], SR[3], SR[4]:
1,0,1 = Block locked; operation aborted
P P
Range Error
Comments
Comments
Datasheet
61