16C450

ST16C450 UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) September 2003 GENERAL DESCRIPTION The ST16C450 is a universal asynchronous receiver and transmitter. The ST16C450 is an improved version of the NS16450 UART with higher operating speed and lower access time. A programmable baud rate generator is provided to select transmit and www.DataSheet4U.com receive clock rates from 50 Bps to 1.5 Mbps. The ST16C450 on board status registers provides the error conditions, type and status of the transfer operation being performed. Included is complete MODEM control capability, and a processor interrupt system that may be software tailored to the user’s requirements. The ST16C450 provides internal loopback capability for on board diagnostic testing. The ST16C450 is available in 40 pin PDIP, 44 pin PLCC, and 48 pin TQFP packages. It is fabricated in an advanced CMOS process to achieve low drain power and high speed requirements. PLCC Package -DSR 41 -CTS 40 39 38 37 36 35 VCC N.C. -CD 42 -RI 43 D4 D3 D2 D1 D0 D5 D6 D7 RCLK RX N.C. TX CS0 CS1 -CS2 -BAUDOUT 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 44 6 5 4 3 2 1 RESET -OP1 -DTR -RTS -OP2 N.C. INT N.C. A0 A1 A2 ST16C450CJ44 34 33 32 31 30 29 XTAL1 XTAL2 -IOW -IOR -DDIS IOW N.C. FEATURES Pin to pin and functionally compatible to the Industry Standard 16450 2.97 to 5.5 volt operation 1.5 Mbps transmit/receive operation (24MHz) Programmable word lengths (5, 6, 7, 8) Even, odd, force, ...