欢迎访问ic37.com |
会员登录 免费注册
发布采购

C8051F336 参数 Datasheet PDF下载

C8051F336图片预览
型号: C8051F336
PDF下载: 下载PDF文件 查看货源
内容描述: 混合信号ISP功能的Flash MCU系列 [Mixed Signal ISP Flash MCU Family]
分类和应用: 微控制器和处理器外围集成电路
文件页数/大小: 234 页 / 3348 K
品牌: SILICON [ SILICON ]
 浏览型号C8051F336的Datasheet PDF文件第97页浏览型号C8051F336的Datasheet PDF文件第98页浏览型号C8051F336的Datasheet PDF文件第99页浏览型号C8051F336的Datasheet PDF文件第100页浏览型号C8051F336的Datasheet PDF文件第102页浏览型号C8051F336的Datasheet PDF文件第103页浏览型号C8051F336的Datasheet PDF文件第104页浏览型号C8051F336的Datasheet PDF文件第105页  
C8051F336/7/8/9  
The level of Flash security depends on the Flash access method. The three Flash access methods that  
can be restricted are reads, writes, and erases from the C2 debug interface, user firmware executing on  
unlocked pages, and user firmware executing on locked pages. Table 16.1 summarizes the Flash security  
features of the C8051F336/7/8/9 devices.  
Table 16.1. Flash Security Summary  
Action  
C2 Debug  
Interface  
User Firmware executing from:  
an unlocked page a locked page  
Read, Write or Erase unlocked pages  
(except page with Lock Byte)  
Permitted  
Permitted  
Permitted  
Permitted  
Permitted  
Permitted  
Permitted  
Permitted  
Read, Write or Erase locked pages  
(except page with Lock Byte)  
Not Permitted Flash Error Reset  
Permitted Permitted  
Not Permitted Flash Error Reset  
Permitted Permitted  
Not Permitted Flash Error Reset  
Read or Write page containing Lock Byte  
(if no pages are locked)  
Read or Write page containing Lock Byte  
(if any page is locked)  
Read contents of Lock Byte  
(if no pages are locked)  
Read contents of Lock Byte  
(if any page is locked)  
Erase page containing Lock Byte  
(if no pages are locked)  
Permitted  
Flash Error Reset Flash Error Reset  
Flash Error Reset Flash Error Reset  
Erase page containing Lock Byte—Unlock all  
pages (if any page is locked)  
C2 Device  
Erase Only  
Lock additional pages  
(change '1's to '0's in the Lock Byte)  
Not Permitted Flash Error Reset Flash Error Reset  
Not Permitted Flash Error Reset Flash Error Reset  
Not Permitted Flash Error Reset Flash Error Reset  
Unlock individual pages  
(change '0's to '1's in the Lock Byte)  
Read, Write or Erase Reserved Area  
C2 Device Erase - Erases all Flash pages including the page containing the Lock Byte.  
Flash Error Reset - Not permitted; Causes Flash Error Device Reset (FERROR bit in RSTSRC is '1' after  
reset).  
- All prohibited operations that are performed via the C2 interface are ignored (do not cause device reset).  
- Locking any Flash page also locks the page containing the Lock Byte.  
- Once written to, the Lock Byte cannot be modified except by performing a C2 Device Erase.  
- If user code writes to the Lock Byte, the Lock does not take effect until the next device reset.  
Rev. 0.2  
101