RC28F256 Intel Corporation, RC28F256 Datasheet - Page 92

• Manufacturer Part Number: RC28F256
• Description: Intel StrataFlash Embedded Memory
• Manufacturer: Intel Corporation

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1-Gbit P30 Family
Figure 47.
April 2005
92
Protection Register Programming Flowchart
Address & Data
Register Data
Read Status
Read Status
PR Address
Write 0xC0,
Full Status
(if desired)
Successful
Complete
Write PR
Register
Program
Program
SR[7] =
SR[3] =
SR[4] =
SR[1] =
Check
Start
1
0
0
0
0
1
1
1
Intel StrataFlash
(Program Setup)
(Confirm Data)
PROTECTION REGISTER PROGRAMMING PROCEDURE
Order Number: 306666, Revision: 001
Register Locked;
Program Aborted
V
Program Error
PP
Range Error
FULL STATUS CHECK PROCEDURE
®
Embedded Memory (P30)
Operation
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
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
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.
Check SR[7]:
1 = WSM Ready
0 = WSM Busy
Check SR[3]:
1 =V
Check SR[4]:
1 =Programming Error
Check SR[1]:
1 =Block locked; operation aborted
PP
Range Error
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