参数资料
型号: AT89C51ID2-SLRUM
厂商: Atmel
文件页数: 25/157页
文件大小: 0K
描述: IC 8051 MCU 64K FLASH 44-PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 500
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 标准包装
其它名称: 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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