參數資料
型號： SST89V54RD2A-33-C-TQJE
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： ROHS COMPLIANT, MS-026, TQFP-44
文件頁數： 55/83頁
文件大?。?/td> 1746K
代理商： SST89V54RD2A-33-C-TQJE
Data Sheet
FlashFlex51 MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
SST89V54RD2A/RDA / SST89V58RD2A/RDA
59
2006 Silicon Storage Technology, Inc.
S71339-00-000
12/06
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: Security Lock Options
Level
Security Lock Bits1,2
Security Status of:
Security Type
SFST[7:5]
SB1
SB21
SB31
Block 1
Block 0
1
000
UUU
Unlock
No Security Features are Enabled.
2
100
P
U
SoftLock
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.
3
011
101
U
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 may program Block 0 and vice
versa.
110
001
P
U
P
U
P
Hard Lock
SoftLock
Level 2 plus Verify disabled. Code in
Block 1 may program Block 0.
4
111
PPP
Hard Lock
Same as Level 3 hard lock/hard lock,
but MCU will start code execution
from the internal memory regardless
of EA#.
T9-1.0 1339
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)
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相關代理商/技術參數
參數描述
SST89V54RD2RD 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-RD 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD-33-C-PI 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD-33-C-PIE 功能描述:8位微控制器 -MCU 24KB+1KB 33MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
SST89V54RD-33-C-QIF 功能描述:8位微控制器 -MCU 8-Bit 16K+8K Flash 33MHz 3/16-Bit Timer RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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