參數(shù)資料
型號(hào): P89C664HFBD
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 80C51 8-bit Flash microcontroller family
中文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-389-1, LQFP-44
文件頁(yè)數(shù): 74/89頁(yè)
文件大?。?/td> 491K
代理商: P89C664HFBD
Philips Semiconductors
Product data
P89C660/P89C662/P89C664/
P89C668
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM
2002 Oct 28
74
Security
The security feature protects against software piracy and prevents the contents of the Flash from being read. The Security Lock bits are located
in Flash. The P89C660/662/664/668 has 3 programmable security lock bits that will provide different levels of protection for the on-chip code
and data (see Table 16).
Table 16.
SECURITY LOCK BITS
1
PROTECTION DESCRIPTION
Level
LB1
LB2
LB3
1
0
0
0
MOVC instructions executed from external program memory are disabled from fetching
code bytes from internal memory.
2
1
0
0
Same as level 1, plus block erase is disabled. Erase or programming of the status byte or
boot vector is disabled.
3
1
1
0
Same as level 2, plus verify of code memory is disabled.
4
1
1
1
Same as level 3, plus external execution is disabled.
NOTE:
1. Security bits are independent of each other. Full-chip erase may be performed regardless of the state of the security bits.
2. Any other combination of lockbits is undefined.
3. Setting LBx doesn’t prevent programming of unprogrammed bits.
相關(guān)PDF資料
PDF描述
P89C662HBA 80C51 8-bit Flash microcontroller family
P89C662HBBD 80C51 8-bit Flash microcontroller family
P89C664HBA 80C51 8-bit Flash microcontroller family
P89C664HBBD 80C51 8-bit Flash microcontroller family
P89C662 80C51 8-Bit Flash Microcontroller 32KB ISP/IAP FLASH with 1KB RAM(80C51 8位閃速微控制器,帶16KB ISP/IAP閃速存儲(chǔ)器和1KB RAM)
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P89C668 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
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