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PDF 29F020 Data sheet ( Hoja de datos )

Número de pieza 29F020
Descripción 2 Megabit (256 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory
Fabricantes Advanced Micro Devices 
Logotipo Advanced Micro Devices Logotipo



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Am29F002B/Am29F002NB
Data Sheet
July 2003
The following document specifies Spansion memory products that are now offered by both Advanced
Micro Devices and Fujitsu. Although the document is marked with the name of the company that orig-
inally developed the specification, these products will be offered to customers of both AMD and
Fujitsu.
Continuity of Specifications
There is no change to this datasheet as a result of offering the device as a Spansion product. Any
changes that have been made are the result of normal datasheet improvement and are noted in the
document revision summary, where supported. Future routine revisions will occur when appropriate,
and changes will be noted in a revision summary.
Continuity of Ordering Part Numbers
AMD and Fujitsu continue to support existing part numbers beginning with “Am” and “MBM”. To order
these products, please use only the Ordering Part Numbers listed in this document.
For More Information
Please contact your local AMD or Fujitsu sales office for additional information about Spansion
memory solutions.
Publication Number 21257 Revision D Amendment 0 Issue Date November 28, 2000

1 page




29F020 pdf
PRODUCT SELECTOR GUIDE
Family Part Number
Speed Option
VCC = 5.0 V ± 5%
VCC = 5.0 V ± 10%
Max access time, ns (tACC)
Max CE# access time, ns (tCE)
Max OE# access time, ns (tOE)
Note: See “AC Characteristics” for full specifications.
-55
55
55
30
Am29F002B/Am29F002NB
-70 -90
70 90
70 90
30 35
-120
120
120
50
BLOCK DIAGRAM
VCC
VSS
RESET#
n/a Am29F002NB
Sector Switches
Erase Voltage
Generator
DQ0DQ7
Input/Output
Buffers
WE#
CE#
OE#
State
Control
Command
Register
PGM Voltage
Generator
Chip Enable
Output Enable
Logic
STB
Data
Latch
VCC Detector
A0–A17
Timer
STB
Y-Decoder
X-Decoder
Y-Gating
Cell Matrix
4
Am29F002B/Am29F002NB
November 28, 2000

5 Page





29F020 arduino
Sector
SA0
SA1
SA2
SA3
SA4
SA5
SA6
Table 3. Am29F002B/Am29F002NB Bottom Boot Block Sector Address Table
A17 A16 A15 A14 A13
0000X
00010
00011
0 01XX
0 1XXX
1 0XXX
1 1XXX
Sector Size
(Kbytes)
16
8
8
32
64
64
64
Address Range
(in hexadecimal)
00000h–03FFFh
04000h–05FFFh
06000h–07FFFh
08000h–0FFFFh
10000h–1FFFFh
20000h–2FFFFh
30000h–3FFFFh
Autoselect Mode
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.
When using programming equipment, the autoselect
mode requires VID on address pin A9. Address pins A6,
A1, and A0 must be as shown in Autoselect Codes
(High Voltage Method) table. In addition, when veri-
fying sector protection, the sector address must appear
on the appropriate highest order address bits. Refer to
the corresponding Sector Address 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 programming
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 VID. See
“Command Definitions” for details on using the autose-
lect mode.
Table 4. Am29F002B/Am29F002NB Autoselect Codes (High Voltage Method)
Description
Manufacturer ID: AMD
Device ID:
Am29F002B/Am29F002NB
(Top Boot Block)
Device ID:
Am29F002B/Am29F002NB
(Bottom Boot Block)
Sector Protection Verification
A17 A12
A8
A5
to to to to
CE# OE# WE# A13 A10 A9 A7 A6 A2 A1 A0
L L H X X VID X L X L L
L LH
X X VID X L X L H
L LH
DQ7
to
DQ0
01h
B0h
L LH
X X VID X L X L H
L LH
34h
01h
(protected)
L L H SA X VID X L X H L
00h
(unprotected)
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.
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
program and erase operations in previously protected
sectors.
10
Am29F002B/Am29F002NB
November 28, 2000

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