參數(shù)資料
型號: AT89C51CC02UA-RATUM
廠商: Atmel
文件頁數(shù): 96/159頁
文件大小: 0K
描述: IC 8051 MCU 16K FLASH 32-VQFP
產(chǎn)品培訓模塊: MCU Product Line Introduction
標準包裝: 1,250
系列: AT89C CAN
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: CAN,UART/USART
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 20
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-LQFP
包裝: 托盤
產(chǎn)品目錄頁面: 616 (CN2011-ZH PDF)
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
41
AT/T89C51CC02
4126L–CAN–01/08
Figure 17. Reading Procedure
Note:
aa = 10 for the Hardware Security Byte.
Flash Protection from Parallel
Programming
The three lock bits in Hardware Security Byte (See ’In-System Programming’ section)
are programmed according to Table 24 provide different level of protection for the on-
chip code and data located in FM0 and FM1.
The only way to write this bits are the parallel mode. They are set by default to level 3.
Table 24. Program Lock bit
Note:
1. Program Lock bits
U: unprogrammed
P: programmed
WARNING: Security level 2, 3 and 4 should only be programmed after Flash and Core
verification.
Preventing Flash Corruption
Flash Spaces Reading
Flash Spaces Mapping
FCON = 00000aa0b
Data Read
DPTR = Address
ACC= 0
Exec: MOVC A, @A+DPTR
Clear Mode
FCON = 00h
Program Lock bits
Protection Description
Security
Level
LB0
LB1
LB2
1
U
No program lock features enabled.
2
P
U
Parallel programming of the Flash is disabled.
3U
P
U
Same as 2, also verify through parallel programming interface is
disabled. This is the factory defaul programming.
4U
U
P
Same as 3
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