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參數(shù)資料
| 型號： | SST89V58RD2-40-I-PI |
| 廠商： | Silicon Storage Technology, Inc. |
| 英文描述： | FlashFlex51 MCU |
| 中文描述： | FlashFlex51單片機 |
| 文件頁數(shù)： | 61/91頁 |
| 文件大?。?/td> | 984K |
| 代理商： | SST89V58RD2-40-I-PI |
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Preliminary Specifications
FlashFlex51 MCU
SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2
SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2
61
2004 Silicon Storage Technology, Inc.
S71255-00-000
3/04
9.4 Read Operation Under Lock Condition
The status of security bits SB1, SB2, and SB3 can be read
when the read command is disabled by security lock.
There are three ways to read the status.
1. External host mode: Read-back = 00H (locked)
2. IAP command: Read-back = previous SFDT data
3. MOVC: Read-back = FFH (blank)
TABLE
9-1: S
ECURITY
L
OCK
O
PTIONS
Level
1
2
Security Lock Bits
1,2
SFST[7:5]
SB1
000
100
Security Status of:
Block 1
Unlock
SoftLock
Security Type
No Security Features are Enabled.
MOVC instructions executed from
external program memory are dis-
abled from fetching code bytes from
internal memory, EA# is sampled and
latched on Reset, and further pro-
gramming of the flash is disabled.
Level 2 plus Verify disabled, both
blocks locked.
Level 2 plus Verify disabled. Code in
Block 1 may program Block 0 and vice
versa.
Level 2 plus Verify disabled. Code in
Block 1 may program Block 0.
Same as Level 3 hard lock/hard lock,
but MCU will start code execution
from the internal memory regardless
of EA#.
SB2
1
U
U
SB3
1
U
U
Block 0
Unlock
SoftLock
U
P
3
011
101
010
U
P
U
P
U
P
P
P
U
Hard Lock
Hard Lock
SoftLock
SoftLock
110
001
111
P
U
P
P
U
P
U
P
P
Hard Lock
SoftLock
4
Hard Lock
Hard Lock
T9-1.0 1255
1. P = Programmed (Bit logic state = 0), U = Unprogrammed (Bit logic state = 1).
2. SFST[7:5] = Security Lock Status Bits (SB1_i, SB2_i, SB3_i)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SST89V54RD2 | FlashFlex51 MCU |
| SST89V54RD2-33-C-NI | FlashFlex51 MCU |
| SST89V54RD2-33-C-NJ | FlashFlex51 MCU |
| SST89V54RD2-33-C-PI | FlashFlex51 MCU |
| SST89V54RD2-33-C-PJ | FlashFlex51 MCU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SST89V58RD2-40-I-PIE1 | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V58RD2-40-I-PIF2 | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V58RD2-40-I-PJ | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V58RD2-40-I-PJE1 | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V58RD2-40-I-PJF2 | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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