AM29F016-90EC AMD (ADVANCED MICRO DEVICES), AM29F016-90EC Datasheet - Page 9

• Manufacturer Part Number: AM29F016-90EC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM29F016-90EC

• Lead Free Status / Rohs Status: Not Compliant

Autoselect
The autoselect mode allows the reading of a binary
code from the device and will identify its manufacturer
and type. This mode is intended for use by program-
ming equipment for the purpose of automatically
matching the device to be programmed with its corre-
sponding programming algorithm. This mode is func-
tional over the entire temperature range of the device.
To activate this mode, the programming equipment
must force V
Two identifier bytes may then be sequenced from the
device outputs by toggling address A0 from V
All addresses are don’t cares except A0, A1, and A6
(seeTable 2).
The manufacturer and device codes may also be read
via the command register, for instances when the
Am29F016 is erased or programmed in a system with-
out access to high voltage on the A9 pin. The command
* Outputs 01H at protected sector addresses
Manufacturer Code
Am29F016 Device
Sector Group Protection
Type
ID
(11.5 V to 12.5 V) on address pin A9.
–
AMD
Table 2. Am29F016 Sector Protection Verify Autoselect Codes
X
X
Sector Group
A18 to A20
Address
X
X
X
X
A6
V
V
V
IL
IL
IL
IL
to V
V
A1
V
V
Am29F016
IH
IH
IL
IL
.
V
V
V
A0
IH
IL
IL
sequence is illustrated in Table 5 (see Autoselect Com-
mand Sequence).
Byte 0 (A0 = V
(AMD = 01H) and byte 1 (A0 = V
code for Am29F016 = ADH. These two bytes are given
in the table below. All identifiers for manufacturer and
device will exhibit odd parity with DQ7 defined as the
parity bit. In order to read the proper device codes
when executing the Autoselect, A1 must be V
Table 2).
The autoselect mode also facilitates the determination
of sector group protection in the system. By performing
a read operation at the address location XX02H with
the higher order address bits A18, A19, and A20 set to
the desired sector group address, the device will return
01H for a protected sector group and 00H for a
non-protected sector group.
(HEX)
Code
01H*
ADH
01H
DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0
0
1
0
IL
0
0
0
) represents the manufacturer’s code
0
1
0
0
0
0
IH
) the device identifier
0
1
0
0
1
0
0
0
0
IL
(see
1
1
1
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