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The PI7C9X794 (794), is a 1.62V to 3.6V Quad Universal Asynchronous Receiver and Transmitter (UART) with 5V tolerant serial (modem) inputs.
The highly integrated device is designed for high bandwidth requirement in communication systems. The global interrupt source register provides a complete interrupt status indication for all 8 channels to speed up interrupt parsing.
Each UART has its own 16C550 compatible set of configuration registers, TX and RX FIFOs of 64 bytes, fully programmable transmit and receive FIFO trigger levels, TX and RX FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, RS-485 half-duplex direction control, andauto address detection, Intel or Motorola bus interface and sleep mode with a wake-up indicator.
Remote Access Servers
Ethernet Network to Serial Ports
Factory Automation and Process Control
Multi-port RS-232/RS-422/RS-485 Cards
1.62V to 3.6V with 5V Tolerant Serial Inputs
Single Interrupt output for all 4 UARTs
A Global Interrupt Source Register for all 4 UARTs
5G “Flat” UART Registers for easier programming
Simultaneous Initialization of all UART channels
A General Purpose Command-driven 16-bit Timer/counter
Sleep Mode with Wake-up Indication
Highly Integrated Device for Space Saving
Each UART is independently controlled with: - 16C550 Compatible 5G Register Set - 64-byte Transmit and Receive FIFOs - Transmit and Receive FIFO Level Counters - Programmable TX and RX FIFO Trigger Level - Automatic RTS/CTS or DTR/DSR Flow Control - Automatic Xon/Xoff Software Flow Control - RS485 HDX Control Output - RS485 auto address detection - Infrared (IrDA 1.0/1.1) Data Encoder/Decoder - Programmable Data Rate with Prescaler
Up to 8 Mbps Serial Data Rate with 64MHz external clock input
Crystal oscillator(up to 24MHz) or external clock(up to 80MHz) input
Environmental Compliance Legend: LFF: Pb-Free Finish and RoHS 5/6 TLFP: Totally Pb-Free Product and RoHS 6/6 LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free GREEN: Halogen-free and RoHS compliant RoHS: RoHS compliant but NOT halogen-free