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The PI7C9X754 (754), 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. 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 hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, RS-485 half-duplex direction control, Intel or Motorola bus interface and sleep mode for power saving.
1.62V to 3.6V with 5V Tolerant Serial Inputs
Programmable Sleep Mode with automatic wake-up - Intel or Motorola Data Bus Interface select
Each UART is independently controlled with: - 6C550 Compatible Register Set - 64-byte Transmit and Receive FIFOs - Transmit and Receive FIFO Level Counters - Programmable TX and RX FIFO Trigger Levels for DMA and Interrupt Generation → Programmable Receive FIFO Trigger Levels for Software/Hardware Flow Control → Programmable hysteresis(Table A-D) for Software/ Hardware Flow Control - Automatic RTS/CTS Flow Control - Automatic Xon/Xoff Software Flow Control with Optional Data Flow Resume by Xon Any Character → DMA Signaling Capability for both Received and Transmitted Data - RS485 HDX Control Output - RS485 auto address detection - Infrared (IrDA 1.0/1.1) Data Encoder/Decoder - Programmable Data Rate with Prescaler
Up to 16 Mbps Serial Data Rate with 64MHz external clock input
Crystal oscillator(up to 24MHz) or external clock(up to 80MHz) input