Main pins thiab functions ntawm SD card

CLK: moos teeb liab. Tus maub los xa ib qho lus txib me ntsis lossis cov ntaub ntawv me ntsis hauv txhua lub voj voog moos. Nyob rau hauv hom ceev ceev ntawm SD npav, qhov zaus tuaj yeem sib txawv ntawm {{0}} mus rau 25MHz. Tus neeg saib xyuas tsheb npav ntawm SD daim npav tuaj yeem tsim tawm qhov zaus ntawm 0 txog 25MHz yam tsis muaj kev txwv. Raws li uhs-i ceev hom, lub moos zaus tuaj yeem ncav cuag 208m.

CMD: Hais kom ua thiab teb multiplexing tus pin. Cov lus txib raug xa los ntawm tus maub los rau SD card. Nws tuaj yeem yog los ntawm tus maub los rau ib daim npav SD lossis txhua daim npav ntawm SD npav; Cov lus teb yog cov lus teb hais kom xa los ntawm daim npav nco mus rau tus maub los. Cov lus teb tuaj yeem yog los ntawm ib daim npav lossis txhua daim npav.

Dat0 ~ 3: cov ntaub ntawv kab, cov ntaub ntawv tuaj yeem kis tau los ntawm daim npav mus rau tus maub los lossis los ntawm tus maub los rau daim npav.

Tus pin txhais ntawm SD daim npav txawv ntawm daim npav micro SD (TF) .

SD daim npav: {{0}}data3, 2-cmd, 3-vss, 4-vdd, 5-clk, 6-vss, { {7}}data0,8-data1,{11}}data2

TF Card (SD hom): {{0}}data2,2-data3,3-cmd, 4-vdd, 5-clk, {{7} }vss, 7-data0,{10}}data1

TF Card (SPI hom): 1-rsv, 2-cs, 3-di, 4-vdd, 5-sclk, 6-vss, { {6}}ua, 8-rsv