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Re: 關於16F630 configuration word 的 bandgap 設定
#2
初級會員
初級會員


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您的問題很深喔!! 試著回答您,但我也沒把握是否已針對到Microchip 原廠的意義...

Silicon has three major advantages over GaAs. First, silicon is cheap. This is for several reasons: silicon's large wafer size (maximum of ~300 mm compared to ~150 mm diameter), higher strength allowing for easier processing, and of course the scale of the economy.
The second major advantage is the existence of silicon dioxide — one of the best known insulators of any kind. Silicon dioxide can easily be incorporated into silicon circuits wherever a good insulator is required. GaAs circuits must either use the intrinsic semiconductor itself or silicon nitride; neither comes close to the extremely good properties of silicon dioxide.
The third, and perhaps most important, advantage is that silicon posesses a much higher hole mobility. This allows the fabrication of higher-speed P-channel field effect transistors, which are required for CMOS logic. A lack of a fast CMOS structure means that GaAs logic circuits have much higher power consumption, which has made them unable to compete with silicon logic circuits.

以上截錄自底下網址:
http://en.wikipedia.org/wiki/Gallium_arsenide

Datasheet: page 54, 註1, 有說到一些,它在出廠時已校正好了,當你做erase前要將它讀出並保存,(Microchip研發工具將會保存出廠校正值)

但沒說用啥方式去讀取與保存...不過,如果用的是Microchip的工具,那就不必管它了吧!! 呵呵...


發表於: 2005/12/2 12:28
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關於16F630 configuration word 的 bandgap 設定
#1
新會員
新會員


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16F630 的configuration word 裡的 BG0:BG1 作何用的阿...datasheet上的說明我看了還是不太明白...有誰知道的呢?因為我在燒錄的時發現有的是01有的是11,如果我都將設定值為01的MCU強迫設成11對MCU的動作會有影響嗎?

發表於: 2005/12/2 9:48
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