AT89S52(单片机)\摘要及部分说明.doc ...................\AT89S52-24PI.pdf ...................\AT89S52.pdf AT89S52(单片机) P89V51RD2\P87C51RA2_RB2_RC2_RD2_3.pdf .........\P89V51RD2BN.pdf P89V51RD2