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. Am29DL162C/Am29DL163C 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
Manufacturer ID: AMD
Device ID: Am29DL162C
Device ID: Am29DL163C
L
L
L
L
L
L
H
H
H
BA
BA
BA
X
X
X
X
X
X
L
L
L
X
X
X
L
L
L
L
H
H
X
X
01h
22h
22h
X
2Dh (T), 2Eh (B)
28h (T), 2Bh (B)
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.
13
Am29DL162C/Am29DL163C
SPANSION [ SPANSION ]
