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August 12, 2004 S29PL127J_064J_032J_MCP_00_A3
S29PL127J/S29PL064J/S29PL032J for MCP
49
A d v a n c e I n f o r m a t i o n
Autoselect Mode
The autoselect mode provides manufacturer and device identification, and sector
protection verification, through identifier codes output on DQ7–DQ0. This mode
is primarily intended for programming equipment to automatically match a device
to be programmed with its corresponding programming algorithm. However, the
autoselect codes can also be accessed in-system through the command register.
When using programming equipment, the autoselect mode requires V
ID
on ad-
dress pin A9. Address pins must be as shown in Table
8
and Table
11
. In addition,
when verifying sector protection, the sector address must appear on the appro-
priate highest order address bits (see Table
3
). Table
8
and Table
11
show the
remaining address bits that are don’t care. When all necessary bits have been set
as required, the programming equipment may then read the corresponding iden-
tifier code on DQ7–DQ0. However, the autoselect codes can also be accessed in-
system through the command register, for instances when the device is erased
or programmed in a system without access to high voltage on the A9 pin. The
command sequence is illustrated in Table
17
.
Note that if a Bank Address (BA)
(on address bits PL127J: A22
–
A20, PL064J: A21
–
A19, PL032J: A20
–A18)
is as-
serted during the third write cycle of the autoselect command, the host system
can read autoselect data that bank and then immediately read array data from
the other bank, without exiting the autoselect mode.
To access the autoselect codes in-system, the host system can issue the autose-
lect command via the command register, as shown in Table
17
. This method does
not require V
ID
. Refer to the Autoselect Command Sequence for more
information.
Legend:
L = Logic Low = V
IL
, H = Logic High = V
IH
, BA = Bank Address, SA = Sector Address, X = Don’t care.
Note:
The autoselect codes may also be accessed in-system via command sequences
Table 8. Autoselect Codes (High Voltage Method)
Description
CE#
OE#
WE#
Amax
to
A12
A1
0
A9
A8
A7
A6
A5
to
A4
A3
A2
A1
A0
DQ15
to DQ0
Manufacturer ID
:
Spansion
products
L
L
H
BA
X
V
ID
X
L
L
X
L
L
L
L
0001h
D
Read
Cycle 1
L
L
H
BA
X
V
ID
X
L
L
L
L
L
L
H
227Eh
Read
Cycle 2
L
H
H
H
L
2220h (PL127J)
2202h (PL064J)
220Ah (PL032J)
Read
Cycle 3
L
H
H
H
H
2200h (PL127J)
2201h (PL064J)
2201h (PL032J)
Sector Protection
Verification
L
L
H
SA
X
V
ID
X
L
L
L
L
L
H
L
0001h (protected),
0000h (unprotected)
Secured Silicon
Indicator Bit
(DQ7, DQ6)
L
L
H
BA
X
V
ID
X
X
L
X
L
L
H
H
00C4h (factory and
customer locked), 0084h
(factory locked), 0004h
(not locked)