D A T A S H E E T
must appear on the appropriate highest order address
Autoselect Mode
bits (see Tables 2 and 3). Table 4 shows the remaining
address bits that are don’t care. When all necessary
bits are set as required, the programming equipment
may then read the corresponding identifier code on
DQ7–DQ0.
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.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 12, on page 26.
This method does not require VID. See “Command Def-
initions” on page 21 for details on using the autoselect
mode.
When using programming equipment, the autoselect
mode requires VID 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
Table 4. Am29SL160C Autoselect Codes (High Voltage Method)
A19 A11
to to
Mode CE# OE# WE# A12 A10 A9
A8
to
A7
A5
to
A2
DQ8
to
A0 DQ15
DQ7
to
DQ0
Description
A6
A1
Manufacturer ID: AMD
L
L
L
L
H
H
X
X
VID
X
X
L
X
X
L
L
X
01h
E4
Device ID:
Am29SL160CT
(Top Boot Block)
Word
Byte
Word
Byte
22h
X
X
VID
L
L
L
L
H
L
L
L
L
L
L
H
H
H
X
22h
X
E4
E7
E7
Device ID:
Am29SL160CB
(Bottom Boot Block)
X
X
X
X
VID
VID
VID
X
X
X
X
X
X
H
L
01h
(protected)
X
X
Sector Protection Verification
L
L
L
L
H
H
SA
SA
L
L
H
H
00h
(unprotected)
81h
(factory
locked)
SecSi Sector Indicator bit
(DQ7)
H
X
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.
Note: Outputs for data bits DQ8–DQ1ꢀ are for BYTE#=VIH. DQ8–DQ1ꢀ are don’t care when BYTE#=VIL.
14
Am29SL160C
21635C5 January 23, 2007
AMD [ AMD ]
