AM29F160DB-90EI Spansion Inc., AM29F160DB-90EI Datasheet - Page 14

• Manufacturer Part Number: AM29F160DB-90EI
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of AM29F160DB-90EI

• Memory Size: 16Mbit
• Memory Configuration: 2M X 8 / 1M X 16
• Ic Interface Type: Parallel
• Access Time: 90ns
• No. Of Pins: 48
• Operating Temperature Range: -40°C To +85°C
• Termination Type: SMD
• Memory Voltage, Vcc: 5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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. However,
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
Autoselect Codes (High Voltage Method) table. In addi-
tion, when verifying sector protection, the sector ad-
L = Logic Low = V
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both pro-
gram 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.
It is possible to determine whether a sector is protected
or unprotected. See “Autoselect Mode” for details.
Sector protection/unprotection can be implemented via
two methods.
12
Manufacturer ID: AMD
Device ID:
Am29F160D
(Top Boot Block)
Device ID:
Am29F160D
(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
Word
Byte
Byte
Table 4. Am29F160D Autoselect Codes (High Voltage Method)
CE#
L
L
L
L
L
L
OE#
IH
L
L
L
L
L
L
, SA = Sector Address, X = Don’t care.
WE#
H
H
H
H
H
H
A19
A12
SA
to
X
X
X
Am29F160D
A11
A10
to
X
X
X
X
V
V
V
V
A9
dress must appear on the appropriate highest order
address bits. Refer to the corresponding Sector Ad-
dress Tables. The Command Definitions table shows
the remaining address bits that are don’t care. When all
necessary bits have been set as required, the program-
ming equipment may then read the 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 the Command Defini-
tions table. This method does not require V
“Command Definitions” for details on using the autose-
lect mode.
The primary method requires V
only, and can be implemented either in-system or via
programming equipment. Figure 2 shows the algo-
rithms and Figure 20 shows the timing diagram. This
method uses standard microprocessor bus cycle tim-
ing. For sector unprotect, all unprotected sectors must
first be protected prior to the first sector unprotect write
cycle.
The alternate method intended only for programming
equipment requires V
This method is compatible with programmer routines
written for earlier 5.0 volt-only AMD flash devices. De-
tails on this method are provided in a supplement, pub-
lication number 22289. Contact an AMD representative
to request a copy.
ID
ID
ID
ID
A8
A7
to
X
X
X
X
A6
L
L
L
L
A5
A2
to
X
X
X
X
ID
A1
H
L
L
L
on address pin A9 and OE#.
A0
H
H
L
L
ID
DQ15
DQ8
on the RESET# pin
22h
22h
to
X
X
X
X
X
(unprotected)
(protected)
DQ7
DQ0
D2h
D2h
D8h
D8h
01h
01h
00h
to
ID
. See