參數(shù)資料
型號(hào)： Am29LV320DT90EF
廠商： Advanced Micro Devices, Inc.
英文描述： 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
中文描述： 32兆位（4個(gè)M × 8位/ 2米x 16位），3.0伏的CMOS只，引導(dǎo)扇區(qū)閃存
文件頁(yè)數(shù)： 20/55頁(yè)
文件大?。?/td> 1258K
代理商： AM29LV320DT90EF
20
Am29LV320D
November 15, 2004
SecSi
TM
Sector (Secured Silicon) Flash
Memory Region
The Secured Silicon Sector (SecSi Sector) fea-
ture provides a Flash memory region that en-
ables permanent part identification through an
Electronic Serial Number (ESN). The SecSi Sec-
tor uses a SecSi Sector Indicator Bit (DQ7) to
indicate whether or not the SecSi Sector is
locked when shipped from the factory. This bit
is permanently set at the factory and cannot be
changed, which prevents cloning of a factory
locked part. This ensures the security of the
ESN once the product is shipped to the field.
Note that the Am29LV320D has a SecSi
Sector size of 64 Kbytes. AMD devices des-
ignated as replacements or substitutes,
such as the Am29LV320M, have 256 bytes.
This should be considered during system
design.
AMD offers the device with the SecSi Sector ei-
ther factory locked or customer lockable. The
factory-locked version is always protected
when shipped from the factory, and has the
SecSi Sector Indicator Bit permanently set to a
“1.” The customer-lockable version is shipped
with the SecSi Sector unprotected, allowing
customers to utilize the that sector in any man-
ner they choose. The customer-lockable ver-
sion has the SecSi Sector Indicator Bit
permanently set to a “0.” Thus, the SecSi Sec-
tor Indicator Bit prevents customer-lockable
devices from being used to replace devices that
are factory locked.
The system accesses the SecSi Sector through
a command sequence (see
“Enter SecSi
TM
Sec-
tor/Exit SecSi Sector Command Sequence” on
page 26
). After the system writes the Enter
SecSi Sector command sequence, it may read
the SecSi Sector by using the addresses nor-
mally occupied by the boot sectors. This mode
of operation continues until the system issues
the Exit SecSi Sector command sequence, or
until power is removed from the device. On
power-up, or following a hardware reset, the
device reverts to sending commands to the
boot sectors.
Factory Locked: SecSi Sector Programmed
and Protected at the Factory
In a factory locked device, the SecSi Sector is
protected when the device is shipped from the
factory. The SecSi Sector cannot be modified in
any way. The device is available prepro-
grammed with one of the following:
■
A random, secure ESN only
■
Customer code through the ExpressFlash
service
■
Both a random, secure ESN and customer
code through the ExpressFlash service.
In devices that have an ESN, a Bottom Boot de-
vice has the 16-byte (8-word) ESN in sector 0
at addresses 00000h–0000Fh in byte mode (or
00000h–00007h in word mode). In the Top
Boot device the ESN is in sector 63 at ad-
dresses 3F0000h–3F000Fh in byte mode (or
1F8000h–1F8007h in word mode). Note that in
upcoming top boot versions of this device, the
ESN is located in sector 70 at addresses
3FE000h–3FE00Fh in byte mode (or
1FF000h–1FF007h in word mode).
Customers may opt to have their code pro-
grammed by AMD through the AMD Express-
Flash service. AMD programs the customer’s
code, with or without the random ESN. The de-
vices are then shipped from AMD’s factory with
the SecSi Sector permanently locked. Contact
an AMD representative for details on using
AMD’s ExpressFlash service.
Customer Lockable: SecSi Sector NOT
Programmed or Protected at the Factory
The customer lockable version allows the SecSi
Sector to be programmed once and then per-
manently locked after it ships from AMD.
Note
that the Am29LV320D has a SecSi Sector
size of 64 Kbytes. AMD devices designated
as replacements or substitutes, such as
the Am29LV320M, have 256 bytes. This
should be considered during system de-
sign. Additionally, note the change in the
location of the ESN in upcoming top boot
factory locked devices.
Note that the accel-
erated programming (ACC) and unlock bypass
functions are not available when programming
the SecSi Sector.
The SecSi Sector area can be protected using
the following procedures:
■
Write the three-cycle Enter SecSi Region
command sequence, and then follow the
in-system sector protect algorithm as shown
in
Figure 2, on page 19
, except that
RESET#
may be at either V
IH
or V
ID
. This allows
in-system protection of the SecSi Sector
without raising any device pin to a high volt-
age. Note that this method is only applicable
to the SecSi Sector.
■
To verify the protect/unprotect status of the
SecSi Sector, follow the algorithm shown in
Figure 3, on page 21
.
相關(guān)PDF資料
PDF描述
AM29LV320DT90EI 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
AM29LV320MB90RE 16-Bit Buffer/Drivers With 3-State Outputs 48-CFP -55 to 125
AM29LV320MT100E 32 Megabit (2 M x 16-Bit/4 M x 8-Bit) MirrorBit 3.0 Volt-only Boot Sector Flash Memory
AM29LV320MT100EI 32 Megabit (2 M x 16-Bit/4 M x 8-Bit) MirrorBit 3.0 Volt-only Boot Sector Flash Memory
AM29LV320MB100PC 32 Megabit (2 M x 16-Bit/4 M x 8-Bit) MirrorBit 3.0 Volt-only Boot Sector Flash Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM29LV320DT90EI 制造商:Advanced Micro Devices 功能描述:
AM29LV320DT90WMI 制造商:Spansion 功能描述:Flash Mem Parallel 3V/3.3V 32M-Bit 4M x 8/2M x 16 90ns 48-Pin FBGA 制造商:Advanced Micro Devices 功能描述:NOR Flash, 2M x 16, 48 Pin, Plastic, BGA
AM29LV320MB100EI 制造商:Advanced Micro Devices 功能描述:
AM29LV320MB90RPCI 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 32MBIT 4MX8/2MX16 90NS 64BGA - Trays
AM29LV320MB90RWCI 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 32MBIT 4MX8/2MX16 90NS 48FBGA - Trays
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