Ei16C450 UART Semiconductor, Inc. FEATURES • Complete status reporting capabilities • Tri-State® TTL drive capabilities for bi-direc tional data bus and control bus • Line break generation and detection • Internal diagnostic capabilities: • 5V Operation • Full duplex asynchronous receiver and transmitter • Easily interfaces to most popular microprocessors • Adds or deletes standard asynchronous communication bits (start, stop, and parity ) to or from a serial data stream • Independently controlled transmitter, receiver, line status, and data set interrupts DESCRIPTION • Programmable baud rate generator allows division of any input clock by 1 to (216-1) and generates the internal 16 x clock The Epic Ei16C450 Universal Asynchronous Receiver Transmitter (UART) is a CMOS-VLSI communication device in a single package. • Independent receiver clock input • MODEM control functions (CTS, RTS, DSR, DTR, RI, and DCD) • Fully programmable serial interface characteris tics: The UART performs serial to parallel conversion on data characters received from a peripheral device or a MODEM, and parallel-to-serial conversions on data characters received from the CPU. The CPU can read the complete status of the UART at any time during the functional operation. Status information reported includes the type and condition of the transfer operation being performed by the UART, as well as any error conditions (parity, overrun, framing, or break detect). • - Loopback controls for communications link fault isolation - Break, parity overrun, and framing error simulation - 5, 6, 7, or 8 bit characters - Even, odd, or no-parity bit generation and detection - 1, 1.5, or 2 stop bit generation - Baud generation (DC to 56k baud) • Fully prioritized interrupt systems controls Part Numbers May Be Marked With "IMP" or "Ei." False start bit detection 40-PIN DIP N.C. D4 D3 D2 D1 D0 VCC RI DCD • DSR • CTS • N.C. 47 46 45 44 43 42 41 40 39 38 37 1 36 N.C. D5 2 35 RESET D6 3 34 OP1 • D7 4 33 DTR • RCLK 5 32 RTS • N.C. 6 31 OP2 • RX 7 30 INT TX 8 29 N.C. CS0 9 28 A0 44-PIN PLCC Ei16C450 18 19 20 21 22 23 24 IOR • IOR N.C. DDIS • CSOUT AS • N.C. GND 25 17 12 IOW • A2 BAUDOUT • 16 A1 26 IOW • 27 11 15 10 XTAL2 CS1 CS2 • 13 MR OUT1• DTR• RTS• OUT2• NC INTRPT NC A0 A1 A2 14 Ei16C450 39 38 37 36 35 34 33 32 31 30 29 N.C. 7 8 9 10 11 12 13 14 15 16 17 N.C. XTAL1 D5 D6 D7 RCLK SIN NC SOUT CS0 CS1 CS2• BAUDOUT• D4 D3 D2 D1 D0 NC VCC RI• DCD• CDSR• CTS• VCC RI• DCD• DSR• CTS• MR OUT1• DTR• RTS• OUT2• INTRPT NC A0 A1 A2 ADS• CSOUT DDIS DISTR DISTR• 6 5 4 3 2 1 44 43 42 41 40 E i 1 6 C 4 5 0 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 18 19 20 21 22 23 24 25 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 XTAL1 XTAL2 DOSTR• DOSTR VSS NC DISTR• DISTR DDIS CSOUT ADS• D0 D1 D2 D3 D4 D5 D6 D7 RCLK SIN SOUT CS0 CS1 CS2• BAUDOUT• XTAL1 XTAL2 DOSTR• DOSTR VSS 48 PIN CONFIGURATION 48-PIN TQFP 5 For additional information, contact IMP, Inc. at 408.432.9100 or visit www.impweb.com IMP, Inc. acquired Epic products on January 26, 2001. (see press release at http://www.impweb.com/PRESS/PR012601.htm)