28F640W30 NUMONYX [Numonyx B.V], 28F640W30 Datasheet - Page 77

• Manufacturer Part Number: 28F640W30
• Description: Numonyx Wireless Flash Memory (W30)
• Manufacturer: NUMONYX [Numonyx B.V]

Numonyx™ Wireless Flash Memory (W30)
.
Figure 35: Protection Register Programming Flowchart
November 2007
Order Number: 290702-13
Addr=Prot addr
Address / Data
Write Protect.
Read Status
Successful
SR[7] = 1?
Full Status
(if desired)
Read SRD
Write C0h
Complete
SR[4:3] =
SR[4,1] =
SR[4,1] =
Register
Register
Program
Program
Check
Start
Yes
No
1,1
1,0
1,1
Programming Error
Program Aborted
PROTECTION REGISTER PROGRAMMING PROCEDURE
V
Locked-Register
PP
Range Error
FULL STATUS CHECK PROCEDURE
Operation
Protection Program operations 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.
Operation
SR[3] MUST be cleared before the WSM will allow further
program attempts.
Only the Clear Staus Register command clears SR[4:3,1].
If an error is detected, clear the status register before
attempting a program retry or other error recovery.
Standby
Standby
Standby
Standby
Write
Write
Read
Bus
Bus
Command
Command
Protection
Protection
Program
Program
Setup
Data = C0h
Addr = Protection address
Data = Data to program
Addr = Protection address
Read SRD
Toggle CE# or OE# to update SRD
Check SR[7]
1 = WSM Ready
0 = WSM Busy
SR[1] SR[3] SR[4]
0
0
1
1
0
0
Comments
Comments
1
1
1
V
Protection register
program error
Register locked;
Operation aborted
PP
Error
Datasheet
77