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参数资料
| 型号： | AM29LV065DU90REEN |
| 厂商： | Advanced Micro Devices, Inc. |
| 英文描述： | 64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control |
| 中文描述： | 64兆位（8米× 8位）的CMOS 3.0伏特，只有统一部门闪光控制记忆与VersatileIOTM |
| 文件页数： | 20/52页 |
| 文件大小： | 1184K |
| 代理商： | AM29LV065DU90REEN |
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January 10, 2002
Am29LV065D
19
SecSi (Secured Silicon) Sector Flash
Memory Region
The SecSi (Secured Silicon) Sector feature provides a
Flash memory region that enables permanent part
identification through an Electronic Serial Number
(ESN). The SecSi Sector is 256 bytes in length, and
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 secu-
rity of the ESN once the product is shipped to the field.
AMD offers the device with the SecSi Sector either
factory locked or customer lockable. The fac-
tory-locked version is always protected when shipped
from the factory, and has the SecSi (Secured Silicon)
Sector Indicator Bit permanently set to a
“
1.
”
The cus-
tomer-lockable version is shipped with the SecSi Sec-
tor unprotected, allowing customers to utilize that
sector in any manner they choose. The customer-lock-
able version also has the SecSi Sector Indicator Bit
permanently set to a
“
0.
”
Thus, the SecSi Sector Indi-
cator Bit prevents customer-lockable devices from
being used to replace devices that are factory locked.
The SecSi sector address space in this device is allo-
cated as follows:
Table 5.
SecSi Sector Contents
The system accesses the SecSi Sector through a
command sequence (see
“
Enter SecSi Sector/Exit
SecSi Sector Command Sequence
”
). After the system
has written the Enter SecSi Sector command se-
quence, it may read the SecSi Sector by using the ad-
dresses normally occupied by the first sector (SA0).
This mode of operation continues until the system is-
sues 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 sector SA0.
Factory Locked: SecSi Sector Programmed and
Protected At the Factory
In devices with an ESN, the SecSi Sector is protected
when the device is shipped from the factory. The SecSi
Sector cannot be modified in any way. A factory locked
device has an 16-byte random ESN at addresses
000000h
–
00000Fh.
Customers may opt to have their code programmed by
AMD through the AMD ExpressFlash service. 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 Express-
Flash service.
Customer Lockable: SecSi Sector NOT
Programmed or Protected At the Factory
As an alternative to the factory-locked version, the de-
vice may be ordered such that the customer may pro-
gram and protect the 256-byte SecSi sector. The
SecSi Sector is one-time programmable, may not be
erased, and can be locked only once. Note that the ac-
celerated programming (ACC) and unlock bypass
functions are not available when programming the
SecSi Sector.
The SecSi Sector area can be protected using one of
the following procedures:
I
Write the three-cycle Enter SecSi Sector Region
command sequence, and then follow the in-system
sector protect algorithm as shown in
Figure 2
, ex-
cept 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 voltage.
Note that this method is only applicable to the SecSi
Sector.
I
Write the three-cycle Enter SecSi Sector Region
command sequence, and then use the method of
sector protection described in the
“
Sector Group
Protection and Unprotection
”
section.
The SecSi Sector is one-time programmable. Once
the SecSi Sector is programmed, locked and verified,
the system must write the Exit SecSi Sector Region
command sequence to return to reading and writing
the remainder of the array.
The SecSi Sector protection must be used with cau-
tion since, once protected, there is no procedure avail-
able for unprotecting the SecSi Sector area and none
of the bits in the SecSi Sector memory space can be
modified in any way.
Hardware Data Protection
The command sequence requirement of unlock cycles
for programming or erasing provides data protection
against inadvertent writes (refer to
Table 10
for com-
mand definitions). In addition, the following hardware
data protection measures prevent accidental erasure
or programming, which might otherwise be caused by
spurious system level signals during V
CC
power-up
and power-down transitions, or from system noise.
Low V
CC
Write Inhibit
When V
CC
is less than V
LKO
, the device does not ac-
cept any write cycles. This protects data during V
CC
power-up and power-down. The command register
and all internal program/erase circuits are disabled,
and the device resets to the read mode. Subsequent
SecSi Sector
Address Range
Standard
Factory Locked
ExpressFlash
Factory Locked
ESN or
determined by
customer
Determined by
customer
Customer
Lockable
000000h
–
00000Fh
ESN
Determined by
customer
000010h
–
00007Fh,
000400h
–
00047Fh
Unavailable
相关PDF资料 |
PDF描述 |
|---|---|
| AM29LV065DU90REI | 64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control |
| AM29LV065DU90REIN | 64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control |
| AM29LV065DU90RFE | 64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control |
| AM29LV065DU101RWHE | 64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control |
| AM29LV065DU90RWHIN | 64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AM29LV065DU90REF | 制造商:Spansion 功能描述:NOR Flash Parallel 3V/3.3V 64Mbit 8M x 8bit 90ns 48-Pin TSOP 制造商:Spansion 功能描述:IC SM FLASH 3V 64MB |
| AM29LV065DU90REF | 制造商:Spansion 功能描述:FLASH MEMORY IC |
| AM29LV065DU90REI | 制造商:Spansion 功能描述:NOR Flash Parallel 3.3V 64Mbit 8M x 8bit 90ns 48-Pin TSOP 制造商:Spansion 功能描述:IC, FLASH MEM, 64MBIT, 90NS, 48-TSOP, Memory Type:Flash, Memory Size:64Mbit, Mem |
| AM29LV065DU-90REI | 制造商:Advanced Micro Devices 功能描述:NOR Flash, 8M x 8, 48 Pin, Plastic, TSSOP |
| AM29LV065DU90RWHF | 制造商:Spansion 功能描述: |
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