XR16C872 Datasheet | Exar

DISCONTINUED DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER DESCRIPTION August 2003 The XR16C8721 (872) is a dual universal asynchronous receiver and transmitter (UART) with a 1284 bi-directional parallel port and ISA Bus Plug-and-Play (Pn P) interface. The Pn P interface supports auto configuration for desktop and embedded PC puters. The host bus interface can also be configured to manually support standard PC addresses 1-4 and LPT1-2. The parallel port is patible to IEEE 1284 specification and supports patible Centronics, Extended Capability (ECP) and Enhanced Parallel Port (EPP) protocols. The UARTs are software patible to industry standard 16C550 and include enhanced Features of 128 bytes of transmit and receive FIFOs, programmable transmit and receive FIFO trigger levels, transmit and receive FIFO counters, Ir DA (Infrared Data Association) encoder/decoder, automatic RTS/CTS hardware flow control with selectable hysteresis and automatic software (Xon/Xoff) flow control. On board status registers provide interrupt priorities, receive data errors and modem status. Each channel has a programmable baud rate generator to provide data rates up to 460.8Kbps. The bidirectional parallel port can be configured as a general purpose input/output interface or connected to a printer or portable storage devices. The 872 operates on a single +5V and +3.3 power supply. It is available in a small 100pin QFP package and offers mercial and industrial temperature ranges. The chip is fabricated in an advanced CMOS process to reduce power consumption. Features - Plug and Play ISA Bus Specification pliant - Auto Configuration - Direct Connection, Needing no External Buffers - Resource Data in External 4K EEPROM - Support 10-Interrupts, IRQ3-7, IRQ9-12, IRQ15 - Manual Configuration for standard 1--4 and LPT1-LPT2 - IEEE 1284 pliant .. - Bidirectional Host Port - Level II Electrical Interface, Needing no...