306666-11 Datasheet, PDF (72/99 Pages) Numonyx B.V – Numonyx StrataFlash Embedded Memory

P30
Appendix A Write State Machine
Figure 32 through Figure 37 show the command state transitions (Next State Table)
based on incoming commands. Only one partition can be actively programming or
erasing at a time. Each partition stays in its last read state (Read Array, Read Device
ID, CFI Query or Read Status Register) until a new command changes it. The next WSM
state does not depend on the partition’s output state.
Figure 32: Write State Machine—Next State Table (Sheet 1 of 6)
Current Chip
State ⁽⁷⁾
Command Input to Chip and resulting Chip Next State
Read
Word
Array ⁽²⁾ Program ^(3,4)
Buffered
Program
(BP)
Erase
Setup ^(3,4)
BE Confirm,
Buffered
P/E
Enhanced
Resume,
Factory Pgm
Setup ^{(3, 4)}
ULB,
Confirm ⁽⁸⁾
BP / Prg /
Erase
Suspend
Read
Status
Clear
Status
Register ⁽⁵⁾
Read
ID/Query
Lock, Unlock,
Lock-down,
CR setup ⁽⁴⁾
Ready
Lock/CR Setup
OTP
Setup
Busy
Setup
Word
Program
Busy
Suspend
Setup
(FFH)
Ready
(10H/40H)
Program
Setup
(E8H)
BP Setup
(20H)
Erase
Setup
Ready (Lock Error)
(80H)
BEFP Setup
(D0H)
Ready
(Unlock
Block)
(B0H)
Program Busy
Word Program Suspend
OTP Busy
Word Program Busy
Word
Program
Suspend
Word
Program
Busy
BP Load 1
(70H)
Ready
(50H)
(90H, 98H)
(60H)
Lock/CR
Setup
Ready (Lock Error)
Word Program Busy
Word Program Suspend
BP Load 1
BP Load 2
BP Load 2
BP
BP
Confirm
BP Confirm if Data load into Program Buffer is complete; Else BP Load 2
Ready (Error)
BP Busy
Ready (Error)
Erase
BP Busy
BP
Suspend
Setup
BP Busy
BP Suspend
Ready (Error)
Busy
Erase
Suspend
Suspend
Erase Busy
Word
Program
Setup in
Erase
Suspend
BP Setup in
Erase
Suspend
Erase Suspend
BP Suspend
BP Busy
Erase Busy
Erase
Suspend
Erase Busy
BP Busy
BP Suspend
Ready (Error)
Erase Busy
Erase Suspend
Lock/CR
Setup in
Erase
Suspend
Datasheet
72
November 2007
Order Number: 306666-11