ST16C550

ST16C550 UART WITH 16-BYTE FIFO’s GENERAL DESCRIPTION The ST16C550 (550) is a universal asynchronous receiver and transmitter with 16 byte transmit and receive FIFO. It operates at 2.97 to 5.5 volts. A programmable baud rate generator can select transmit and receive clock rates from 50 bps to 1.5 Mbps. The ST16C550 is an improved version of the NS16C550 UART with higher operating speed and lower access time. The ST16C550 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 ST16C550 provides internal loopback capability for on board diagnostic testing. The ST16C550 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. April 2005 PLCC Package 6 D4 5 D3 4 D2 3 D1 2 D0 1 N.C. 44 VCC 43 -RI 42 -CD 41 -DSR 40 -CTS D5 D6 D7 RCLK RX N.C. TX CS0 CS1 -CS2 -BAUDOUT 7 8 9 10 11 12 13 14 15 16 17 ST16C550CJ44 39 RESET 38 -OP1 37 -DTR 36 -RTS 35 -OP2 34 N.C. 33 INT 32 -RXRDY 31 A0 30 A1 29 A2 XTAL1 18 XTAL2 19 -IOW 20 IOW 21 GND 22 N.C. 23 -IOR 24 IOR 25 -DDIS 26 -TXRDY 27 -AS 28 FEATURES Pin to pin and functionally compatible to the Industry Standard 16C550 2.97 to 5.5 volt operation 24MHz clock operation at 5V 16MHz clock operation at 3.3V 16 byte transmi...