- 您现在的位置：买卖IC网 > PDF目录85251 > SST89V54RDA-33-C-QIF 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, QCC40 PDF资料下载
参数资料
| 型号： | SST89V54RDA-33-C-QIF |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, QCC40 |
| 封装： | ROHS COMPLIANT, MO-220IWJJD-5, WQFN-40 |
| 文件页数： | 55/84页 |
| 文件大小： | 1755K |
| 代理商： | SST89V54RDA-33-C-QIF |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页当前第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页
Data Sheet
FlashFlex MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
SST89V54RD2A/RDA / SST89V58RD2A/RDA
59
2007 Silicon Storage Technology, Inc.
S71339-01-000
1/07
9.0 SECURITY LOCK
The security lock protects against software piracy and pre-
vents the contents of the flash from being read by unautho-
rized parties. It also protects against code corruption
resulting from accidental erasing and programming to the
internal flash memory. There are two different types of
security locks in the device security lock system: hard lock
and SoftLock.
9.1 Hard Lock
When hard lock is activated, MOVC or IAP instructions exe-
cuted from an unlocked or soft locked program address
space, are disabled from reading code bytes in hard locked
memory blocks (See Table 9-2). Hard lock can either lock
both flash memory blocks or just lock the 8 KByte flash
memory block (Block 1). All external host and IAP com-
mands except for Chip-Erase are ignored for memory
blocks that are hard locked.
9.2 SoftLock
SoftLock allows flash contents to be altered under a secure
environment. This lock option allows the user to update
program code in the soft locked memory block through in-
application programming mode under a predetermined
secure environment. For example, if Block 1 (8K) memory
block is locked (hard locked or soft locked), and Block 0
memory block is soft locked, code residing in Block 1 can
program Block 0. The following IAP mode commands
issued through the command mailbox register, SFCM, exe-
cuted from a Locked (hard locked or soft locked) block, can
be operated on a soft locked block: Block-Erase, Sector-
Erase, Byte-Program and Byte-Verify.
In external host mode, SoftLock behaves the same as a
hard lock.
9.3 Security Lock Status
The three bits that indicate the device security lock
status are located in SFST[7:5]. As shown in Figure 9-
1 and Table 9-1, the three security lock bits control the
lock status of the primary and secondary blocks of
memory. There are four distinct levels of security lock
status. In the first level, none of the security lock bits
are programmed and both blocks are unlocked. In the
second level, although both blocks are now locked and
cannot be programmed, they are available for read
operation via Byte-Verify. In the third level, three differ-
ent options are available: Block 1 hard lock / Block 0
SoftLock, SoftLock on both blocks, and hard lock on
both blocks. Locking both blocks is the same as Level
2, Block 1 except read operation isn’t available. The
fourth level of security is the most secure level. It
doesn’t allow read/program of internal memory or boot
from external memory. For details on how to program
the security lock bits refer to the external host mode
and in-application programming sections.
FIGURE
9-1: Security Lock Levels
Note:
P = Programmed (Bit logic state = 0), U = Unprogrammed (Bit logic state = 1), N = Not Locked, L = Hard locked, S = Soft locked
Level 1
Level 2
Level 3
Level 4
UUU/NN
PUU/SS
UPP/LL
PPU/LS
UPU/SS
PPP/LL
1339 F29.0
PUP/LL
UPP/LL
UUP/LS
相关PDF资料 |
PDF描述 |
|---|---|
| SL28540ALC | OTHER CLOCK GENERATOR, QCC56 |
| S83C154UFXXX-36:D | 8-BIT, MROM, 36 MHz, MICROCONTROLLER, PQCC44 |
| S83C154UFXXX-40:R | 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PQCC44 |
| S83C154UFXXX-42:D | 8-BIT, MROM, 42 MHz, MICROCONTROLLER, PQCC44 |
| S912XDP512J1MAL | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP112 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SST89V554 | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554-25-C-NI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554-25-C-NJ | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554-25-C-PI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554-25-C-PJ | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
发布紧急采购，3分钟左右您将得到回复。