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| 型號： | P912XDP512F0CFVR |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Covers, S12XD, S12XB & S12XA Families |
| 中文描述： | 封面，S12XD，S12XB |
| 文件頁數(shù)： | 1231/1350頁 |
| 文件大?。?/td> | 3951K |
| 代理商： | P912XDP512F0CFVR |
MC9S12XDP512 Data Sheet, Rev. 2.17
Freescale Semiconductor
1231
Chapter 30
Security (S12X9SECV2)
30.1
Introduction
This specification describes the function of the security mechanism in the S12X chip family
(S12X9SECV2).
30.1.1
Features
Theusermustberemindedthatpartofthesecuritymustliewiththeapplicationcode.Anextremeexample
would be application code that dumps the contents of the internal memory. This would defeat the purpose
of security. At the same time, the user may also wish to put a backdoor in the application program. An
example of this is the user downloads a security key through the SCI, which allows access to a
programming routine that updates parameters stored in another section of the Flash memory.
The security features of the S12X chip family (in secure mode) are:
Protect the contents of non-volatile memories (Flash, EEPROM)
Execution of NVM commands is restricted
Disable access to internal memory via background debug module (BDM)
Disable access to internal Flash/EEPROM in expanded modes
Disable debugging features for CPU and XGATE
Table 30-1
gives an overview over availability of security relevant features in unsecure and secure modes.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P912XDP512F0CPV | Covers, S12XD, S12XB & S12XA Families |
| P912XDP512F0CPVR | Covers, S12XD, S12XB & S12XA Families |
| P912XDP512F0MAA | Covers, S12XD, S12XB & S12XA Families |
| P912XDP512F0MAAR | Covers, S12XD, S12XB & S12XA Families |
| P912XDP512F0MAG | Covers, S12XD, S12XB & S12XA Families |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P912XDP512J1VPVR | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCS12X Microcontrollers |
| P912XEQ512J2MAL | 制造商:Freescale Semiconductor 功能描述: |
| P913 | 功能描述:重負(fù)荷電源連接器 SB350 CR HOUSING ONLY, RED RoHS:否 制造商:Hirose Connector 系列:PS2 產(chǎn)品類型:Connectors 位置/觸點數(shù)量: 端接類型:Crimp 觸點材料: 觸點電鍍:Gold 電壓額定值: 電流額定值:300 A 附件類型: |
| P9-131121 | 制造商:OTTO 功能描述:Pushbutton Switches Flush Dome QuickConn 5A SPST-DB, SPDT-DB 制造商:OTTO Engineering Inc 功能描述:Switch Push Button N.O. Flush Dome 5A 115VAC 28VDC Momentary Contact Quick Connect Panel Mount |
| P9-131121W | 功能描述:按鈕開關(guān) Flush Dome QuickConn 5A SPST-DB, SPDT-DB RoHS:否 制造商:OTTO 觸點形式: 開關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 安裝風(fēng)格: 照明: 照明顏色: IP 等級: 端接類型: 觸點電鍍: 執(zhí)行器: 蓋顏色: 封裝: 可燃性等級: |
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