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 (11.5 V
ID
to 12.5 V) on address pin A9. Address pins A6, A1, and A0 must be as shown in
Table 4. In addition, when verifying sector protection, the sector address must
appear on the appropriate highest order address bits (see Tables 2 and 3). Table
4 shows 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 cor-
responding identifier code on DQ7-DQ0.
To access the autoselect codes in-system, the host system can issue the autose-
lect command via the command register, as shown in Tables 10–11. This method
does not require V . See “Command Definitions” for details on using the autose-
ID
lect mode.
Table 4. Autoselect Codes (High Voltage Method)
A19 A11
to to
Mode CE# OE# WE# A12 A10 A9
A8
to
A7
A5
to
DQ8
to
DQ7
to
DQ0
Description
A6
A2 A1 A0 DQ15
Manufacturer ID
(Spansion Products)
L
L
L
L
H
H
X
X
VID
X
X
L
X
X
L
L
X
01h
C4h
Device ID:
S29AL016M
(Model 01)
Word
Byte
Word
22h
X
X
VID
L
L
L
H
L
L
L
L
H
H
X
C4h
49h
(Top Boot Block)
Device ID:
S29AL016M
(Model 02)
(Bottom Boot
Block)
22h
X
X
VID
X
X
L
H
Byte
L
L
L
L
H
H
X
49h
X
X
01h (protected)
Sector Protection
Verification
SA
X
X
X
VID
X
X
L
X
X
H
L
L
00h
(unprotected)
83 (factory
locked
03h (not
SecSi Sector Indicator Bit
(DQ7)
L
L
H
VID
H
H
X
factory locked)
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.
Note: The autoselect codes may also be accessed in-system via command sequences. See Tables 10–11.
Sector Protection/Unprotection
The hardware sector protection feature disables both program and erase opera-
tions in any sector. The hardware sector unprotection feature re-enables both
program and erase operations in previously protected sectors.
The device is normally shipped with all sectors unprotected. However, the Ex-
pressFlash™ Service offers the option of programming and protecting sectors at
the factory prior to shipping the device. Contact a sales office or representative
for details.
It is possible to determine whether a sector is protected or unprotected. See “Au-
toselect Mode” for details.
April 21, 2004 S29AL016M_00A4
S29AL016M
16
SPANSION [ SPANSION ]
