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發表於 2014-3-8 09:47:30
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fatzeros 發表於 2014-3-8 07:36 AM static/image/common/back.gif
可是我查到的87f51怎麼是有4k quickflash的啊!?
http://www.atmel.com/Images/doc1012.pdf
http://www. ...
Page 1:
The AT87F51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K
bytes of QuickFlash Programmable Read Only Memory.
Programmable Read Only Memory - PROM.
本來想說flash或許可以用電氣方式來改變內容,但是找不到QuickFlash的相關資料,datasheet裡只說是PROM,意思可能是也可能不是只能燒錄一次的OTP,是屬於User燒錄型,ROM則為工廠訂製型.
The device is manufactured using Atmel’s high density nonvolatile memory technology
該裝置是採用Atmel的高密度非易失性記憶體技術所製成.
The on-chip QuickFlash allows the program memory to be user programmed by a conventional nonvolatile
memory programmer.
芯片上的QuickFlash允許程式記憶器讓使用者使用傳統的非易失性記憶體燒錄器做燒錄.
由上面看來,很像是OTP,跟89C51,89S51一樣都是採用12V燒錄,能否多次燒錄就需要阿乾大去試看看了. |
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