JS48F4400PCZ00 View Datasheet(PDF) - Numonyx -> Micron
Part Name
Description
Manufacturer
JS48F4400PCZ00 Datasheet PDF : 102 Pages
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Numonyx™ Wireless Flash Memory (W18)
Figure 33: Protection Register Programming Flowchart
Start
Write C0h
Addr=Prot addr
Write Protect.
Register
Address / Data
Read Status
Register
SR[7] = 1? No
Yes
Full Status
Check
(if desired)
Program
Complete
PROTECTION REGISTER PROGRAMMINGPROCEDURE
Bus
Command
Operation
Comments
Write
Protection
Data = C0h
Program
Addr = Protection address
Setup
Protection Data = Data to program
Write
Program Addr = Protection address
Read
Read SRD
Toggle CE# or OE# to update SRD
Standby
Check SR[7]
1 = WSM Ready
0 = WSM Busy
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.
Read SRD
SR[4:3] = 1,1
FULL STATUS CHECK PROCEDURE
Bus
Command
Operation
Comments
VPP Range Error
Standby
Standby
SR[1] SR[3] SR[4]
0
1
1 VPP Error
0 0 1 Protection register
program error
SR[4,1] = 1,0 Programming Error
Standby
1 0 1 Register locked;
Operation aborted
SR[4,1] = 1,1
Locked-Register
Program Aborted
Program
Successful
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.
Datasheet
76
November 2007
Order Number: 290701-18
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