有個想問好久的問題, Lock Bit 怎樣用呢? 而且有 LB 1, LB 2 及 LB 3 又是甚麼呢? 謝謝

何種燒錄器

http://www.kmitl.ac.th/~kswichit/IspPgm30a/ISP-Pgm30a.html

http://www.e-midas.cn/Article_Show.asp?ArticleID=143 中有提到 LB2/1: 程序区加密位选择 11 11：未加密 10：程序和EEPROM编程功能禁止，熔丝位锁定 00：程序和EEPROM编程及校验功能禁止，熔丝位锁定 （注：先编程其他熔丝位，再编程加密位） http://www.atmel.com/dyn/resources/prod_documents/2486S.pdf 在它的說明書中就有提到 Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program. True Read-While-Write Operation Programming Lock for Software Security http://www.atmel.com/dyn/resources/prod_documents/doc2486.pdf 而在這份詳細說明中也說到 Program Flash memory space is divided in two sections, the Boot program section and the Application program section. Both sections have dedicated Lock Bits for write and read/write protection. The SPM instruction that writes into the Application Flash memory section must reside in the Boot program section. The Flash memory has an endurance of at least 10,000 write/erase cycles. The ATmega8 Program Counter (PC) is 12 bits wide, thus addressing the 4K Program memory locations. The operation of Boot Program section and associated Boot Lock Bits for software protection are described in detail in “Boot Loader Support – Read-While-Write Self-Programming” on page 206. “Memory Programming” on page 219 contains a detailed description on Flash Programming in SPI- or Parallel Programming mode. 所以你的問題是錯的。 不是燒錄器及燒錄軟體要讓你有LB1/2的動作。 而是你所要燒的這顆IC有這個功能。 而它所代表的意義，你必須自己去查閱它的手冊。 現在網路發達，各製造廠都會把這些詳細文件放在網上。 我相信你可以來到KTOP。對於找資料應不是問題才是。 ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝ http://www.mcu51.com/list.asp?id=1588 想想別人怎麼學，我們有這麼用心嗎？ 憂心啊~~~~~~

先謝謝回覆.我用是89S52, 是否有分別呢? (同一個程式,應該有 L1, L2 及 L3 的, 而 Fuse Bytes是不可選擇)

我想。我之前已經說得很清楚了

引言: 不是燒錄器及燒錄軟體要讓你有LB1/2的動作。 而是你所要燒的這顆IC有這個功能。 而它所代表的意義，你必須自己去查閱它的手冊。

AT89S52 的 Data Shit Features • Compatible with MCS-51® Products • 8K Bytes of In-System Programmable (ISP) Flash Memory – Endurance: 1000 Write/Erase Cycles • 4.0V to 5.5V Operating Range • Fully Static Operation: 0 Hz to 33 MHz • Three-level Program Memory Lock • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel • Low-power Idle and Power-down Modes • Interrupt Recovery from Power-down Mode • Watchdog Timer • Dual Data Pointer • Power-off Flag • Fast Programming Time • Flexible ISP Programming (Byte and Page Mode) 如果自己不想找資料。你永遠學不會這顆IC的啦。 http://www.mcu51.com/list.asp?id=1588 想想別人怎麼學，我們有這麼用心嗎？ 憂心啊~~~~~~

引言: 先謝謝回覆.我用是89S52, 是否有分別呢? (同一個程式,應該有 L1, L2 及 L3 的, 而 Fuse Bytes是不可選擇)

AT89S51與AT89S52 是一樣的