AM29PL160C AMD [Advanced Micro Devices], AM29PL160C Datasheet - Page 14

• Manufacturer Part Number: AM29PL160C
• Description: 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only High Performance Page Mode Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

Autoselect Mode
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 equipment
to automatically match a device to be programmed
with its corresponding programming algorithm. How-
ever, the autoselect codes can also be accessed in-
system through the command register.
When using programming equipment, the autoselect
mode requires V
A9. Address pins A6, A1, and A0 must be as shown in
L = Logic Low = V
Note: The autoselect codes may also be accessed in-system via command sequences. See Table 10.
Sector Protection/Unprotection
The hardware sector protection feature disables both
p r o gra m a n d e ra s e o p e ra t i o n s i n a ny s e c t o r.
The hardware sector unprotection feature re-enables
both program and erase operations in previously
protected sectors.
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sectors at its factory prior to shipping the device
through AMD’s ExpressFlash™ Service. Contact an
AMD representative for details.
12
Manufacturer ID: AMD
Device ID:
Am29PL160C
(Bottom Boot Block)
Sector Protection Verification
Description
IL
ID
, H = Logic High = V
(11.5 V to 12.5 V) on address pin
Mode
Word
Byte
Table 5. Am29PL160C Autoselect Codes (High Voltage Method)
CE#
L
L
L
L
OE#
IH
L
L
L
L
, SA = Sector Address, X = Don’t care.
WE#
H
H
H
H
D A T A
A19
A12
SA
to
X
X
Am29PL160C
A11
A10
to
X
X
X
S H E E T
Table 5. In addition, when verifying sector protection,
the sector address must appear on the appropriate
highest order address bits (Table 4). Table 5 shows the
remaining address bits that are don’t care. When all
necessary bits have been set as required, the pro-
g r a m m i n g e q u i p m e n t m ay t h e n r e a d t h e
corresponding identifier code on DQ7-DQ0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 10. This method
does not require V
details on using the autoselect mode.
It is possible to determine whether a sector is protected
or unprotected. See “Autoselect Mode” for details.
Sector protection and unprotection must be imple-
mented using programming equipment. The procedure
requires V
this method are provided in a supplement, publication
number 22239. Contact an AMD representative to re-
quest a copy.
The device features a temporary unprotect command
sequence to allow changing array data in-system. See
“Temporary Unprotect Enable/Disable Command Se-
quence” for more information.
V
V
V
A9
ID
ID
ID
A8
A7
to
X
X
X
ID
A6
L
L
L
on address pin A9 and OE#. Details on
A5
A2
to
X
X
X
ID
. See “Command Definitions” for
A1
H
L
L
A0
H
L
L
DQ15
DQ8
22143C7 May 9, 2006
22h
to
X
X
X
X
(unprotected)
(protected)
DQ7
DQ0
01h
45h
45h
01h
00h
to