P R E L I M I N A R Y
Table 7. In addition, when verifying sector protection,
Autoselect Mode
the sector address must appear on the appropriate
highest order address bits (see Tables 3–6). Table 7
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 corre-
sponding identifier code on DQ7–DQ0.
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equip-
ment to automatically match a device to be
programmed with its corresponding programming al-
gorithm. However, the autoselect codes can also be
accessed in-system through the command register.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 14. This method
does not require VID. Refer to the Autoselect Com-
mand Sequence section for more information.
When using programming equipment, the autoselect
mode requires VID (8.5 V to 12.5 V) on address pin A9.
Address pins A6, A1, and A0 must be as shown in
Table 7. Am29DL16xC Autoselect Codes, (High Voltage Method)
DQ8 to DQ15
A19
to
A11
to
A8
to
A5
to
DQ7
to
BYTE# BYTE#
Description
CE# OE# WE# A12
A10 A9 A7 A6 A2 A1 A0
= VIH
= VIL
DQ0
VID
VID
VID
VID
Manufacturer ID: AMD
Device ID: Am29DL162C
Device ID: Am29DL163C
Device ID: Am29DL164C
L
L
L
L
L
L
L
L
H
H
H
H
BA
BA
BA
BA
X
X
X
X
X
X
X
X
L
L
L
L
X
X
X
X
L
L
L
L
L
X
X
01h
H
H
H
22h
22h
22h
X
2Dh (T), 2Eh (B)
28h (T), 2Bh (B)
33h (T), 35h (B)
X
X
Sector Protection
Verification
01h (protected),
00h (unprotected)
VID
VID
L
L
L
L
H
H
SA
BA
X
X
X
X
L
L
X
X
H
H
L
X
X
X
X
80h (factory locked),
00h (not factory
locked)
SecSi Sector Indicator Bit
(DQ7)
H
Legend: T = Top Boot Block, B = Bottom Boot Block, L = Logic Low = VIL, H = Logic High = VIH, BA = Bank Address, SA =
Sector Address, X = Don’t care.
Am29DL16xC
13
SPANSION [ SPANSION ]
