- 您现在的位置：买卖IC网 > PDF目录223346 > AM29DL320GB120WMI (ADVANCED MICRO DEVICES INC) 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory PDF资料下载
参数资料
| 型号： | AM29DL320GB120WMI |
| 厂商： | ADVANCED MICRO DEVICES INC |
| 元件分类： | PROM |
| 英文描述： | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| 中文描述： | 2M X 16 FLASH 3V PROM, 120 ns, PBGA48 |
| 封装： | 6 X 12 MM, 0.80 MM PITCH, FBGA-48 |
| 文件页数： | 13/55页 |
| 文件大小： | 1230K |
| 代理商： | AM29DL320GB120WMI |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页
20
Am29DL320G
July 31, 2002
ADV ANC E
INFO RMAT ION
SecSiTM (Secured Silicon) Sector
Flash Memory Region
The SecSi (Secured Silicon) Sector feature provides a
256-byte Flash memory region that enables perma-
nent part identification through an Electronic Serial
Number (ESN). The SecSi Sector 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.
AMD offers the device with the SecSi Sector either
fac tor y lock ed or customer lock able. T he 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 the that
sector in any manner they choose. The customer-lock-
able version has the SecSi (Secured Silicon) Sector
Indicator Bit permanently set to a “0.” Thus, the SecSi
Sector Indicator Bit prevents customer-lockable de-
vices from being used to replace devices that are fac-
tory locked.
The system accesses the SecSi Sector through a
command sequence (see “Enter SecSiTM 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 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 send-
ing commands to the boot sectors.
Factory Locked: SecSi Sector Programmed and
Protected At the Factory
In a factory locked device, the SecSi Sector is pro-
tected when the device is shipped from the factory.
The SecSi Sector cannot be modified in any way. The
device is available preprogrammed with one of the fol-
lowing:
■ 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 device
w ill have the 1 6 -byte ESN at add r e sses
0 0000 0h–0 000 07h
in
w o r d
m ode
( o r
000000h–00000Fh in byte mode). In the Top Boot de-
vice
t he
ESN
will
be
at
add r e sses
1FF000h–1FF007Fh in word mode (or addresses
3FE000h–3FE0FFh in byte mode).
Customers may opt to have their code programmed by
AMD through the AMD ExpressFlash service. AMD
programs the customer’s code, with or without the ran-
dom ESN. The devices 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
If the security feature is not required, the SecSi Sector
can be treated as an additional 256-byte Flash mem-
ory space, expanding the size of the available Flash
array. Additionally, note the difference in the loca-
tion of the ESN compared to previous Am29DL32x
top boot factory locked devices. The SecSi Sector
is one-time programmable, may not be erased, and
can be locked only once. Note that the accelerated
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:
■ 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 VID. 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
■ Write the three-cycle Enter SecSi Sector Region
command sequence, and then use the alternate
method of sector protection described in the “Sec-
tion.
The SecSi Sector is one-time programmable. Once
the SecSi Sector is locked and verified, the system
must write the Exit SecSi Sector Region command se-
quence 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 13 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.
相关PDF资料 |
PDF描述 |
|---|---|
| AM29DL320GB90WMIN | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL320GT120EI | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL320GT120EIN | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL320GT120WDI | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| AM29DL320GT120WDIN | 32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AM29DL320GB70EI | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 3.3V 32M-Bit 4M x 8/2M x 16 70ns 48-Pin TSOP |
| AM29DL322DB7REIT | 制造商:AMD 功能描述:New |
| AM29DL322DB-90WDIT | 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 32MBIT 4MX8/2MX16 90NS 63FBGA - Tape and Reel |
| AM29DL322DT-90EI-T | 制造商:Advanced Micro Devices 功能描述: |
| AM29DL322GB-90EI | 制造商:Advanced Micro Devices 功能描述:2M X 16 FLASH 3V PROM, 90 ns, 48 Pin Plastic SMT |
发布紧急采购，3分钟左右您将得到回复。