參數(shù)資料
型號(hào): SST89C58-33-I-TQJE
廠商: SILICON STORAGE TECHNOLOGY INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝: LEAD FREE, TQFP-44
文件頁(yè)數(shù): 24/52頁(yè)
文件大小: 967K
代理商: SST89C58-33-I-TQJE
30
Data Sheet
FlashFlex51 MCU
SST89C54 / SST89C58
2004 Silicon Storage Technology, Inc.
S71131-04-000
6/04
FIGURE
8-1: SECURITY LOCK LEVELS
TABLE
8-1: SECURITY LOCK OPTIONS
Level
Security Lock Bits1,2
1. SFST[7:5] = Security Lock Decoding Bits (SB1, SB2, SB3)
2. P = Programmed (Cell logic state = 0);
U = Unprogrammed (Cell logic state = 1)
All unused combinations default to level 4, “PPP”
Security Status of:
Security Type
SFST[7:5]
SB1
SB2
SB3
Block 1
Block 0
1
000
U
Unlock
No Security Features are Enabled.
2
100
P
U
Hard Lock
MOVC instructions executed from external program
memory are disabled from fetching code bytes from
internal memory, EA# is sampled and latched on
Reset, and further programming of the flash is dis-
abled.
3
110
101
P
U
P
Hard Lock
Level 2 plus Verify disabled, both blocks locked.
010
U
P
U
SoftLock
Level 2 plus Verify disabled, code in Block 1 can pro-
gram Block 0 and vice versa.
001
U
P
Hard Lock
SoftLock
Level 2 plus Verify disabled, code in Block 1 can pro-
gram Block 0.
4
111
P
Hard Lock
Same as Level 3, Hard Lock/Hard Lock but MCU will
start code execution from the internal memory
regardless of EA#.
T8-1.7 1131
Level 1
Level 2
Level 3
Level 4
UUU/NN
PUU/LL
PPU/LL
PUP/LL
=
UPU/SS
UUP/LS
PPP/LL
1131 F17.0
Note: P = Programmed (Cell logic state = 0),
U = Unprogrammed (Cell logic state = 1)
N = Not Locked, L = Hard Locked, S = Soft Locked
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