JS28F320J3F75A NUMONYX, JS28F320J3F75A Datasheet - Page 57

• Manufacturer Part Number: JS28F320J3F75A
• Description: PARALLEL NOR
• Manufacturer: NUMONYX

Numonyx
Figure 24: Protection Register Programming Flowchart
March 2010
208032-02
®
Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
FULL STATUS CHECK PROCEDURE
Write Protect. Register
Read Status Register
Read Status Register
Program Successful
Program Complete
Data (See Above)
Check if Desired
(Protection Reg.
Program Setup)
Address/Data
SR.3, SR.4 =
SR.1, SR.4 =
SR.1, SR.4 =
Write C0H
Full Status
SR.7 = 1?
Start
Yes
1, 1
0,1
1,1
No
Attempted Program to
Programming Error
Protection Register
Locked Register -
V
PEN
Aborted
Range Error
Protection Program operations can only be addressed within the protection
register address space. Addresses outside the defined space will return an
error.
Repeat for subsequent programming operations.
SR Full Status Check can be done after each program or after a sequence of
program operations.
Write FFH after the last program operation to reset device to read array mode.
SR.3 MUST be cleared, if set during a program attempt, before further
attempts are allowed by the Write State Machine.
SR.1, SR.3 and SR.4 are only cleared by the Clear Staus Register Command,
in cases of multiple protection register program operations before full status is
checked.
If an error is detected, clear the status register before attempting retry or other
error recovery.
Bus Operation
Bus Operation
Standby
Standby
Standby
Standby
Write
Write
Read
Protection Program
Protection Program
Command
Command
Setup
Data = C0H
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
SR.1 SR.3 SR.4
0
0
1
1
0
0
Comments
Comments
1
1
1
V
Prot. Reg.
Prog. Error
Register
Locked:
Aborted
PEN
Low
Datasheet
57