参数资料
型号: AT89C51IC2-SLSIL
厂商: Atmel
文件页数: 14/140页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
标准包装: 27
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
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: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 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: 管件
110
AT89C51IC2
4301D–8051–02/08
Table 86. Default Values
After programming the part by ISP, the BSB must be cleared (00h) in order to allow the
application to boot at 0000h.
The content of the Software Security Byte (SSB) is described in Table 86 and Table 88.
To assure code protection from a parallel access, the HSB must also be at the required
level.
Table 87. Software Security Byte
The two lock bits provide different levels of protection for the on-chip code and data,
when programmed as shown in Table 88.
Mnemonic
Definition
Default value
Description
SBV
Software Boot Vector
FCh
HSB
Hardware security Byte
101x 1011b
BSB
Boot Status Byte
0FFh
SSB
Software Security Byte
FFh
Copy of the Manufacturer Code
58h
ATMEL
Copy of the Device ID #1: Family Code
D7h
C51 X2, Electrically Erasable
Copy of the Device ID #2: memories
F7h
AT89C51IC2 32KB
Copy of the Device ID #3: name and
revision
EFh
AT89C51IC2 32KB, Revision
0
7
6
5
4
3
2
1
0
-
LB1
LB0
Bit
Number
Bit
Mnemonic
Description
7
-
Reserved
Do not clear this bit.
6
-
Reserved
Do not clear this bit.
5
-
Reserved
Do not clear this bit.
4
-
Reserved
Do not clear this bit.
3
-
Reserved
Do not clear this bit.
2
-
Reserved
Do not clear this bit.
1-0
LB1-0
User Memory Lock Bits
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