參數(shù)資料
型號(hào): AT89C51ID2-SLRUM
廠商: Atmel
文件頁數(shù): 25/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU 64K FLASH 44-PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 500
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲(chǔ)器容量: 64KB(64K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: AT89C51ID2-SLRUMDKR
120
AT89C51ID2
4289C–8051–11/05
Table 93. Program Lock bits of the SSB
Note:
U: unprogrammed or "one" level.
P: programmed or "zero" level.
X: do not care
WARNING: Security level 2 and 3 should only be programmed after Flash and code
verification.
Flash Memory Status
AT89C51ID2 parts are delivered in standard with the ISP rom bootloader.
After ISP or parallel programming, the possible contents of the Flash memory are sum-
marized on the figure below:
Figure 45. Flash memory possible contents
Memory Organization
When the EA pin high, the processor fetches instructions from internal program Flash. .
If the EA pin is tied low, all program memory fetches are from external memory.
Program Lock Bits
Protection description
Security
level
LB0
LB1
1
U
No program lock features enabled.
2
P
U
ISP programming of the Flash is disabled.
3
X
P
Same as 2, also verify through ISP programming interface is disabled.
0000h
Virgin
Default
After ISP
After parallel
programming
After parallel
programming
After parallel
programming
Application
Virgin
After ISP
or
Dedicated
ISP
Dedicated
ISP
application
Virgin
or
application
Virgin
or
application
FFFFh
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