... 6,24 Receive Data 5, 23 Send timing 8,26 Receive timing 17, 35 Terminal timing 12,30 Terminal Ready 11,29 Data Mode 7, 25 Request to Send 9,27 Clear to Send 13,31 Receiver Ready 15 Incoming Call 19 ... ñưa chu n giao ti p m i ñ kh c ph c c ñi m c a RS232, ñó RS-449 5. 3.1 Chu n giao ti p RS-449 5. 3.2 Chu n giao ti p RS-422A RS-423A 5. 3.1 Chu n giao ti p RS-449 : Chu n giao ti p RS-449 s d ng ... có m c TTL (H 5. 8) 5. 3 CÁC CHU N GIAO TI P RS-449, RS-422A & RS-423A C A EIA Chu n giao ti p h RS-232 có nhi u h n ch : - T c ñ tín hi u t i ña 20 kbps kho ng cách truy n t i ña 15m - Do s d ng...