[操作疑難] 請問我個電路圖有冇錯??





做project用的,足夠嗎??

本帖最後由 Joe_Black 於 2012-4-3 01:24 編輯

XTAL, 2 cap close to MCU !!!

http://pdf1.alldatasheet.com/dat ... /PHILIPS/89C51.html

page 21, I(IL) = 75uA max. Cannot direct sink current from LED

(ATMEL 89C51 datasheet I(IL) = -50uA Max)

TOP

led +-反轉了

TOP

led +-反轉了
oYueno 發表於 2012-4-3 03:16

他用8951,所以sources電流唔夠大(4mA max),要sink(20mA)

TOP

但我都唔記得29,30 pin洗唔洗接

TOP

XTAL, 2 cap close to MCU !!!



page 21, I(IL) = 75uA max. Cannot direct sink current from LED

(ATM ...
Joe_Black 發表於 2012-4-3 01:23



    最好lay成品字型,越近粒u就越理想

TOP

咁簡單都要双面板

TOP

Should RST pin be pulled up or down?

TOP

Should RST pin be pulled up or down?
ckshum 發表於 2012-4-3 10:40


有心機,果然係錯了

TOP

本帖最後由 edwardfcy 於 2012-4-3 11:42 編輯

回復 1# kwanokboy

師兄 ,是否又是IVE既IS project呀?? 個線路圖是否又是用Eagle劃呢??

TOP