參數(shù)資料
型號: T89C5115-TISUM
廠商: Atmel
文件頁數(shù): 47/113頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 16K 28SOIC
標(biāo)準(zhǔn)包裝: 27
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: UART/USART
外圍設(shè)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(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 管件
其它名稱: 89C5115-TISUM
39
AT89C5115
4128G–8051–02/08
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 23 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 23. 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.
3
U
P
U
Same as 2, also verify through parallel programming interface is
disabled. This is the factory defaul programming.
4
U
P
Same as 3
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