V帮助SCHATK 系统标签: atkschsheetsizeschvatomversion 11223344DDCCBBAATitle:Author:Date:Size:Revision:File:Version:ATK-SIM900A-V152014-04-09ATOMSheetSizeSIM900_MD.SchDocVersion: V1.5PWRKEY1PWRKEYOUT2DTR3RI4DCD5DSR6CTS7RTS8TXD_O9RXD_I10DISP_CLK11DISP_DATA12DISP_D/C13DISP_CS14VDD_EXT15nRES...