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参数资料
| 型号： | S29GL032M10TAIR52 |
| 厂商： | Spansion Inc. |
| 英文描述： | CAP TANT 220UF 2.5V 20% POLY SMD |
| 中文描述： | MirrorBit闪存系列 |
| 文件页数： | 157/159页 |
| 文件大小： | 5216K |
| 代理商： | S29GL032M10TAIR52 |
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Octorber 18, 2004 S29GLxxxM_00_B3
S29GLxxxM MirrorBitTM Flash Family
97
Da tash eet
SecSi (Secured Silicon) Sector Flash Memory Region
The SecSi (Secured Silicon) Sector feature provides a Flash memory region that enables permanent part identi-
fication 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 security of the ESN once the product is shipped to the field.
The factory offers the device with the SecSi Sector either customer lockable (standard shipping option) or factory
locked (contact a Spansion sales representative for ordering information). The customer-lockable version is
shipped with the SecSi Sector unprotected, allowing customers to program the sector after receiving the device.
The customer-lockable version also has the SecSi Sector Indicator Bit permanently set to a “0.” The factory-locked
version is always protected when shipped from the factory, and has the SecSi (Secured Silicon) Sector Indicator
Bit permanently set to a “1.” Thus, the SecSi Sector Indicator Bit prevents customer-lockable devices from being
used to replace devices that are factory locked.
Notes: The ACC function and unlock bypass modes are not available when the SecSi Sector is enabled.
The SecSi sector address space in this device is allocated as follows:
The system accesses the SecSi Sector through a command sequence (see “Write Protect (WP#)” on page 98).
After the system writes the Enter SecSi Sector command sequence, it may read the SecSi Sector by using the
addresses normally occupied by the first sector (SA0). 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 sector SA0.
Customer Lockable: SecSi Sector NOT Programmed or Protected At the Factory
Unless otherwise specified, the device is shipped such that the customer may program and protect the 256-byte
SecSi sector.
The system may program the SecSi Sector using the write-buffer, accelerated and/or unlock bypass methods, in
addition to the standard programming command sequence. See “Command Definitions” on page 103.
Programming and protecting the SecSi Sector must be used with caution since, once protected, there is no pro-
cedure available for unprotecting the SecSi Sector area and none of the bits in the SecSi Sector memory space
can be modified in any way.
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, on page 96, except that RESET# may be at either VIH
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 “Sector Group Protection and Unprotection” section.
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 within the remainder of the array.
SecSi Sector Address
Range
Customer Lockable
ESN Factory Locked
ExpressFlash
Factory Locked
000000h–000007h
Determined by
customer
ESN
ESN or determined by
customer
000008h–00007Fh
Unavailable
Determined by
customer
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相关代理商/技术参数 |
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|---|---|
| S29GL032M10TAIR53 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:MirrorBit Flash Family |
| S29GL032M10TAIR60 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:MirrorBit Flash Family |
| S29GL032M10TAIR62 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:MirrorBit Flash Family |
| S29GL032M10TAIR63 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:MirrorBit Flash Family |
| S29GL032M10TBCR00 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:MirrorBit Flash Family |
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