Functional Description
IN16C1054 is a quad UART(Universal Asynchronous Receiver/Transmitter) with 256-byte FIFO supporting maximum communication speed of 5.3Mbps. It offers flow control function by hardware or software and signal lines which can open or close the Tx/Rx input/output when communicating by RS-422 or RS-485. It can handle four interrupt signals (INT0, INT1, INT2 and INT3) with one global interrupt signal line (GINT) and offers a new ‘Xoff re-transmit’ function in addition to Xon any character.

Features
• 4 Channel UART
• 3.3V Operation
• 5V Tolerant Inputs
• Pin-to-pin Compatible with Industry Standard SB16C554 with Additional
• Enhancements
• Up to 5.3 Mbps Baud Rate (Up to 85 MHz Oscillator Input Clock)
• 256-byte Transmit FIFO
• 256-byte Receive FIFO with Error Flags
• Industrial Temperature Range (-20 to +85 ) ℃ ℃
• Programmable and Selectable Transmit and Receive FIFO Trigger Levels for DMA
• and Interrupt Generation
• Software (Xon/Xoff) / Hardware (RTS#/CTS#) Flow Control
    - Programmable Xon/Xoff Characters
    - Programmable Auto-RTS and Auto-CTS
• Global Interrupt Mask/Poll Control
• Optional Data Flow Resume by Xon Any Character Control
• Optional Data Flow Additional Halt by Xoff Retransmit Control
• RS-422 Point to Point/Multi-Drop Control
• RS-485 Echo/Non Echo Control
• DMA Signaling Capability for Both Received and Transmitted Data
• Software Selectable Baud Rate Generator
• Prescaler Provides Additional Divide-by-4 Function
• Fast Data Bus Access Time
• Programmable Sleep Mode
• Programmable Serial Interface Characteristics
    - 5, 6, 7, or 8-bit Characters
    - Even, Odd, or No Parity Bit Generation and Detection
    - 1, 1.5, or 2 Stop Bit Generation
• False Start Bit Detection
• Line Break Generation and Detection
• Fully Prioritized Interrupt System Controls
• Modem Control Functions (RTS#, CTS#, DTR#, DSR#, DCD#, and RI#)