參數(shù)資料
型號： S12BDLCV1D
廠商： Motorola, Inc.
英文描述： MC9S12DT128 Device User Guide V02.09
中文描述： MC9S12DT128設備的用戶手冊V02.09
文件頁數(shù)： 78/138頁
文件大?。?/td> 2083K
代理商： S12BDLCV1D
MC9S12DT128 Device User Guide — V02.09
78
4.3 Security
The device will make available a security feature preventing the unauthorized read and write of the
memory contents. This feature allows:
Protection of the contents of FLASH,
Protection of the contents of EEPROM,
Operation in single-chip mode, No BDM possible
Operation from external memory with internal FLASH and EEPROM disabled.
The user must be reminded that part of the security must lie with the user’s code. An extreme example
would be user’s code that dumps the contents of the internal program. This code would defeat the purpose
of security. At the same time the user may also wish to put a back door in the user’s program. An example
of this is the user downloads a key through the SCI which allows access to a programming routine that
updates parameters stored in EEPROM.
4.3.1 Securing the Microcontroller
Once the user has programmed the FLASH and EEPROM (if desired), the part can be secured by
programming the security bits located in the FLASH module. These non-volatile bits will keep the part
secured through resetting the part and through powering down the part.
The security byte resides in a portion of the Flash array.
Check the Flash Block User Guide for more details on the security configuration.
4.3.2 Operation of the Secured Microcontroller
4.3.2.1 Normal Single Chip Mode
Thiswillbethemostcommonusageofthesecuredpart.Everythingwillappearthesameasifthepartwas
not secured with the exception of BDM operation. The BDM operation will be blocked.
4.3.2.2 Executing from External Memory
The user may wish to execute from external space with a secured microcontroller. This is accomplished
by resetting directly into expanded mode. The internal FLASH and EEPROM will be disabled. BDM
operations will be blocked.
Table 4-3 Voltage Regulator VREGEN
VREGEN
1
Description
Internal Voltage Regulator enabled
Internal Voltage Regulator disabled, VDD1,2 and
VDDPLL must be supplied externally with 2.5V
0
相關(guān)PDF資料
PDF描述
S12BDMV4 ACB 19C 19#16 PIN RECP BOX
S12BDMV4D MC9S12DT128 Device User Guide V02.09
S12BFV1 MC9S12DT128 Device User Guide V02.09
S12BFV1D MC9S12DT128 Device User Guide V02.09
S12BKPV1 MC9S12DT128 Device User Guide V02.09
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S12BDMV4 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MC9S12DT128 Device User Guide V02.09
S12BDMV4D 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MC9S12DT128 Device User Guide V02.09
S12B-EH 功能描述:CONN HEADER EH SIDE 12POS 2.5MM RoHS:否 類別:連接器，互連式 >> 矩形- 接頭，公引腳 系列:EH 標準包裝:500 系列:951 觸點類型：:公形引腳 連接器類型:接頭，無罩 位置數(shù):39 加載位置的數(shù)目:全部 間距:0.079"（2.00mm） 行數(shù):1 行間距:- 觸點接合長度:0.157"（4.00mm） 安裝類型:表面貼裝 端子:焊接 緊固型:- 特點:- 觸點表面涂層:金 觸點涂層厚度:10µin（0.25µm） 顏色:黑 包裝:帶卷 (TR) 配套產(chǎn)品:953139-2000-AR-TP-ND - CONN SOCKET 39POS 2MM VERT SMD953139-2000-AR-PT-ND - CONN SOCKET 39POS 2MM VERT SMD953139-2000-AR-PR-ND - CONN SOCKET 39POS 2MM VERT SMD950539-6102-AR-ND - CONN SOCKET 39POS 2MM VERT PCB950539-5002-AR-ND - CONN SOCKET 39POS 2MM R/A PCB 其它名稱:0 00 51111 06579 2DE600007285S0 00 51111 06579 2
S12B-EH(LF)(SN) 制造商:JST Manufacturing 功能描述:CONN HEADER EH SIDE 12POS 2.5MM 制造商:JST Manufacturing 功能描述:EH Series 12 Position 2.5 mm Side Entry Single Row Shrouded Header 制造商:JST Manufacturing 功能描述:12 way side entry PCB header,EH 2.5
S12BFV1 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MC9S12DT128 Device User Guide V02.09
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*