SCN2651 Datasheet | NXP Semiconductors

DESCRIPTION The Philips Semiconductors SCN2651 PCI is a universal synchronous/asynchronous data munications controller chip designed for microputer systems. It interfaces directly to the Philips Semiconductors SCN2650 microprocessor and may be used in a polled or interrupt driven system environment. The SCN2651 accepts programmed instructions from the microprocessor and supports many serial data munication disciplines, synchronous and asynchronous, in the full or half-duplex mode. The PCI serializes parallel data characters received from the microprocessor for transmission. Simultaneously, it can receive serial data and convert it into parallel data characters for input to the microputer. The SCN2651 contains a baud rate generator which can be programmed to either accept an external clock or to generate internal transmit or receive clocks. Sixteen different baud rates can be selected under program control when operating in the internal clock mode. The PCI is constructed using Philips Semiconductors n-channel silicon gate depletion load technology and is packaged in a 28-pin DIP. PIN CONFIGURATIONS D2 D3 Rx D GND D4 D5 D6 D7 Tx C A1 CE 1 2 3 4 5 6 7 DIP 8 9 10 11 28 D1 27 D0 26 VCC 25 Rx C 24 DTR 23 RTS 22 DSR 21 RESET 20 BRCLK 19 Tx D 18 Tx EMT/DSCHG 17 CTS 16 DCD 15 Tx RDY TOP VIEW A0 12 R/W 13 Rx RDY 14 FEATURES - Synchronous operation - 5- to 8-bit characters - Single or double SYN operation - Internal character synchronization - Transparent or non-transparent mode - Automatic SYN or DLE-SYN insertion - SYN or DLE stripping - Odd, even, or no parity - Local or remote maintenance loopback mode - Baud rate: DC to 1Mbps (1X clock) SD00049 OTHER FEATURES - Asynchronous operation - 5- to 8-bit characters - 1, 1-1/2 or 2 stop bits - Odd, even, or no parity - Parity, overrun and framing error detection - Line break detection and generation - False start bit detection - Automatic serial echo mode - Local or remote maintenance loopback mode - Baud rate: DC to 1Mbps...