參數(shù)資料
型號(hào)： S29NS256P
廠商： Spansion Inc.
英文描述： MirrorBit Flash Family
中文描述： MirrorBit閃存系列
文件頁數(shù)： 62/86頁
文件大?。?/td> 2234K
代理商： S29NS256P
62
S29NS-P MirrorBit
TM
Flash Family
S29NS-P_00_A1 February 20, 2007
D a t a
S h e e t
( A d v a n c e
I n f o r m a t i o n )
The Customer Secured Silicon Sector can be read any number of times, but can be programmed and
locked only once. The Customer Secured Silicon Sector lock must be used with caution as once locked,
there is no procedure available for unlocking the Customer Secured Silicon Sector area and none of the
bits in the Customer Secured Silicon Sector memory space can be modified in any way.
The accelerated programming (V
PP
) and unlock bypass functions are not available when programming the
Customer Secured Silicon Sector, but reading in Banks 1 through 15 is available.
Once the Customer Secured Silicon Sector is locked and verified, the system must write the Exit Secured
Silicon Sector Region command sequence which return the device to the memory array at sector 0.
9.3
Secured Silicon Sector Entry and Exit Command Sequences
The system can access the Secured Silicon Sector region by issuing the three-cycle Enter Secured Silicon
Sector command sequence. The device continues to access the Secured Silicon Sector region until the
system issues the four-cycle Exit Secured Silicon Sector command sequence.
See Command Definition Table [Secured Silicon Sector Command Table, Appendix
Table 11.1
for address and data requirements for both command sequences.
The Secured Silicon Sector Entry Command allows the following commands to be executed
Read customer and factory Secured Silicon areas
Program the customer Secured Silicon Sector
After the system has written the Enter Secured Silicon Sector command sequence, it may read the Secured
Silicon Sector by using the addresses normally occupied by sector SA0 within the memory array. This mode
of operation continues until the system issues the Exit Secured Silicon Sector command sequence, or until
power is removed from the device.
Software Functions and Sample Code
The following are C functions and source code examples of using the Secured Silicon Sector Entry, Program,
and exit commands. Refer to the
Spansion Low Level Driver User’s Guide
(
www.spansion.com
) for general
information on Spansion Flash memory software development guidelines.
Note
Base = Base Address.
/* Example: Secured Silicon Sector Entry Command */
*( (UINT16 *)base_addr + 0x555 ) = 0x00AA;
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055;
*( (UINT16 *)base_addr + 0x555 ) = 0x0088;
Cmd
*/
/* write unlock cycle 1
/* write unlock cycle 2
/* write Secured Silicon Sector Entry
*/
*/
Note
Base = Base Address.
Table 9.2
Secured Silicon Sector Entry (LLD Function = lld_SecSiSectorEntryCmd)
Cycle
Operation
Byte Address
Word Address
Data
Unlock Cycle 1
Write
Base + AAAh
Base + 555h
00AAh
Unlock Cycle 2
Write
Base + 554h
Base + 2AAh
0055h
Entry Cycle
Write
Base + AAAh
Base + 555h
0088h
Table 9.3
Secured Silicon Sector Program (LLD Function = lld_ProgramCmd)
Cycle
Operation
Byte Address
Word Address
Data
Unlock Cycle 1
Write
Base + AAAh
Base + 555h
00AAh
Unlock Cycle 2
Write
Base + 554h
Base + 2AAh
0055h
Program Setup
Write
Base + AAAh
Base + 555h
00A0h
Program
Write
Word Address
Word Address
Data Word
相關(guān)PDF資料
PDF描述
S29NS256P0PBJW000 MirrorBit Flash Family
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S29NS256P0SBJW000 MirrorBit Flash Family
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S29NS256P0PBJW000 功能描述:閃存 256M (16MX16) 66MHz Simultaneous R/W RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問時(shí)間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel
S29NS256P0PBJW003 制造商:SPANSION 制造商全稱:SPANSION 功能描述:MirrorBit Flash Family
S29NS256P0SBJW000 制造商:SPANSION 制造商全稱:SPANSION 功能描述:MirrorBit Flash Family
S29NS256P0SBJW003 制造商:SPANSION 制造商全稱:SPANSION 功能描述:MirrorBit Flash Family
S29NS256PABBJW000 制造商:SPANSION 制造商全稱:SPANSION 功能描述:MirrorBit Flash Family
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