306666-11 Datasheet, PDF (77/99 Pages) Numonyx B.V – Numonyx StrataFlash Embedded Memory

P30
Figure 37: Write State Machine—Next State Table (Sheet 6 of 6)
Output Next State Table
Command Input to Chip and resulting Output Mux Next State
Current chip state
OTP
Setup ⁽⁴⁾
Lock Lock-Down
Write CR
Block
Confirm ⁽⁸⁾
Block
Confirm ⁽⁸⁾
Confirm ⁽⁸⁾
Block Address
(?WA0)
Illegal Cmds or
BEFP Data ⁽¹⁾
WSM
Operation
Completes
(C0H)
(01H)
(2FH)
(03H)
(FFFFH)
(all other codes)
BEFP Setup,
BEFP Pgm & Verify
Busy,
Erase Setup,
OTP Setup,
BP: Setup, Load 1,
Load 2, Confirm,
Word Pgm Setup,
Word Pgm Setup in
Erase Susp,
BP Setup, Load1,
Load 2, Confirm in
Erase Suspend
Lock/CR Setup,
Lock/CR Setup in
Erase Susp
OTP Busy
Ready,
Erase Suspend,
BP Suspend
BP Busy,
Word Program
Busy,
Erase Busy,
BP Busy
BP Busy in Erase
Suspend
Word Pgm
Suspend,
Word Pgm Busy in
Erase Suspend,
Pgm Suspend In
Erase Suspend
Status Read
Status Read
Array
Read
Status Read
Output does
not change.
Status
Read
Output does not change.
Array Read
Output does not
change.
Notes:
1.
"Illegal commands" include commands outside of the allowed command set (allowed commands: 40H [pgm], 20H [erase],
etc.)
2.
If a "Read Array" is attempted from a busy partition, the result will be invalid data. The ID and Query data are located at
different locations in the address map.
3.
1st and 2nd cycles of "2 cycles write commands" must be given to the same partition address, or unexpected results will
occur.
4.
To protect memory contents against erroneous command sequences, there are specific instances in a multi-cycle
command sequence in which the second cycle will be ignored. For example, when the device is program suspended and an
erase setup command (0x20) is given followed by a confirm/resume command (0xD0), the second command will be
ignored because it is unclear whether the user intends to erase the block or resume the program operation.
5.
The Clear Status command only clears the error bits in the status register if the device is not in the following modes: WSM
running (Pgm Busy, Erase Busy, Pgm Busy In Erase Suspend, OTP Busy, BEFP modes).
6.
BEFP writes are only allowed when the status register bit #0 = 0, or else the data is ignored.
November 2007
Order Number: 306666-11
Datasheet
77