- 您现在的位置：买卖IC网 > PDF目录225140 > S29CD032G0RFFN003 (SPANSION LLC) 1M X 32 FLASH 2.7V PROM, 48 ns, PBGA80 PDF资料下载
参数资料
| 型号： | S29CD032G0RFFN003 |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | 1M X 32 FLASH 2.7V PROM, 48 ns, PBGA80 |
| 封装： | 13 X 11 MM, 1 MM PITCH, LEAD FREE, FORTIFIED, BGA-80 |
| 文件页数： | 31/81页 |
| 文件大小： | 1276K |
| 代理商： | S29CD032G0RFFN003 |
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页当前第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页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页
March 3, 2009 S29CD-G_00_B1
S29CD-G Flash Family
35
Da ta
Shee t
(Prelim i nar y )
13.4
Password and Password Mode Locking Bit
In order to select the Password sector protection scheme, the customer must first program the password.
One method of choosing a password would be to correlate it to the unique Electronic Serial Number (ESN) of
the particular flash device. Another method could generate a database where all the passwords are stored,
each of which correlates to a serial number on the device. Each ESN is different for every flash device;
therefore each password should be different for every flash device. While programming in the password
region, the customer may perform Password Verify operations.
Once the desired password is programmed in, the customer must then set the Password Mode Locking Bit.
This operation achieves two objectives:
1. It permanently sets the device to operate using the Password Protection Mode. It is not possible to
reverse this function.
2. It also disables all further commands to the password region. All program, and read operations are
ignored.
Both of these objectives are important, and if not carefully considered, may lead to unrecoverable errors. The
user must be sure that the Password Protection method is desired when setting the Password Mode Locking
Bit. More importantly, the user must be sure that the password is correct when the Password Mode Locking
Bit is set. Due to the fact that read operations are disabled, there is no means to verify what the password is
afterwards. If the password is lost after setting the Password Mode Locking Bit, there is no way to clear the
PPB Lock bit.
The Password Mode Locking Bit, once set, prevents reading the 64-bit password on the DQ bus and further
password programming. The Password Mode Locking Bit is not erasable. Once Password Mode Locking Bit
is programmed, the Persistent Sector Protection Locking Bit is disabled from programming, guaranteeing that
no changes to the protection scheme are allowed.
13.4.1
64-bit Password
The 64-bit Password is located in its own memory space and is accessible through the use of the Password
Program and Verify commands (see Password Verify Command on page 48). The password function works
in conjunction with the Password Mode Locking Bit, which when set, prevents the Password Verify command
from reading the contents of the password on the pins of the device.
13.5
Write Protect (WP#)
The device features a hardware protection option using a write protect pin that prevents programming or
erasing, regardless of the state of the sector’s Persistent or Dynamic Protection Bits. The WP# pin is
associated with the two outermost 8Kbytes sectors in the 75% bank. The WP# pin has no effect on any other
sector. When WP# is taken to VIL, programming and erase operations of the two outermost 8 Kbytes sectors
in the 75% bank are disabled. By taking WP# back to VIH, the two outermost 8 Kbytes sectors are enabled for
program and erase operations, depending upon the status of the individual sector Persistent or Dynamic
Protection Bits. If either of the two outermost sectors Persistent or Dynamic Protection Bits are programmed,
program or erase operations are inhibited. If the sector Persistent or Dynamic Protection Bits are both erased,
the two sectors are available for programming or erasing as long as WP# remains at VIH. The user must hold
the WP# pin at either VIH or VIL during the entire program or erase operation of the two outermost sectors in
the 75% bank.
13.6
Secured Silicon OTP Sector and Simultaneous Operation
The Secured Silicon Sector is 256 Kbytes and is located in the Small Bank. For S29CD016G and
S29CD032G devices. Spansion programs and permanently locks the Secured Silicon sector with Unique
device identification. Please contact your sales representative for the Electronic Marking information.
Since the Secured Silicon is permanent protected by Spansion, during Simultaneous Operation, the Secured
Silicon sector cannot be erased or reprogrammed.
相关PDF资料 |
PDF描述 |
|---|---|
| S29CD032G0RQFI012 | 1M X 32 FLASH 2.7V PROM, 48 ns, PQFP80 |
| S29CL032J0JFAM020 | 1M X 32 FLASH 3.3V PROM, 54 ns, PBGA80 |
| S29CL032J0JFFM020 | 1M X 32 FLASH 3.3V PROM, 54 ns, PBGA80 |
| S29CL032J0RFAM012 | 1M X 32 FLASH 3.3V PROM, 48 ns, PBGA80 |
| S29GL032A10TAIR11 | Ceramic Chip Capacitors / High Voltage; Capacitance [nom]: 3.3pF; Working Voltage (Vdc)[max]: 500V; Capacitance Tolerance: +/-10%; Dielectric: Multilayer Ceramic; Temperature Coefficient: C0G (NP0); Lead Style: Surface Mount Chip; Lead Dimensions: 0805; Termination: Solder (SnPb) Plated Nickel Barrier; Body Dimensions: 0.079" x 0.049"; Container: Bulk; Features: High Voltage; Unmarked |
相关代理商/技术参数 |
参数描述 |
|---|---|
| S29CD032J0MQAN010 | 制造商:Spansion 功能描述: |
| S29CD032J0MQFM010U | 制造商:Spansion 功能描述:N/A - Trays |
| S29CD032J0PFAM010 | 制造商:Spansion 功能描述: |
| S29CD032J0PQFI010 | 制造商:Spansion 功能描述:AUTO 3.3V 512KX32 FLASH - Trays |
| S29CL016J0JQFM030 | 制造商:Spansion 功能描述:FLASH PARALLEL 3.3V 16MBIT 512KX32 54NS 80PQFP - Trays |
发布紧急采购，3分钟左右您将得到回复。