A product Line of Pb Diodes Incorporated Lead-free Green PI7C9X754 High Performance 1.62V To 3.6V Quad Uart with 64-Byte FIFO Description Features e PTh I7C9X754 (754), is a 1.62V to 3.6V quad Universal Asyn - 1.62V to 3.6V with 5V Tolerant Serial Inputs chronous Receiver and Transmitter (UART) with 5V tolerant se- Programmable Sleep Mode with automatic wake-up rial (modem) inputs. The highly integrated device is designed for Intel or Motorola Data Bus Interface select high bandwidth requirement in communication systems. Each Each UART is independently controlled with: UART has its own 16C550 compatible set of configuration regis - 16C550 Compatible Register Set ters, TX and RX FIFOs of 64 bytes, fully programmable transmit 64-byte Transmit and Receive FIFOs and receive FIFO trigger levels, TX and RX FIFO level counters, Transmit and Receive FIFO Level Counters automatic RTS/CTS hardware ofl w control with programmable Programmable TX and RX FIFO Trigger Levels for hysteresis, automatic software (Xon/Xoff) flow control, RS-485 DMA and Interrupt Generation half-duplex direction control, Intel or Motorola bus interface and Programmable Receive FIFO Trigger Levels for sleep mode for power saving. Software/Hardware Flow Control Programmable hysteresis(Table A-D) for Software/ Hardware Flow Control Application Automatic RTS/CTS Flow Control Automatic Xon/Xoff Software Flow Control with Remote Access Servers Optional Data Flow Resume by Xon Any Character Ethernet Network to Serial Ports DMA Signaling Capability for both Received and Network Management Transmitted Data Factory Automation and Process Control RS485 HDX Control Output RS485 auto address detection Point-of-Sale Systems Infrared (IrDA 1.0/1.1) Data Encoder/Decoder Multi-port RS-232/RS-422/RS-485 Cards 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 Built in Power-On-Reset circuit Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See A product Line of Diodes Incorporated PI7C9X754 PI7C9X754 BLOCK DIAGRAM Block Diagram UART-A Reset 64 Byte TX FIFO UART A 2:0 Regs TXA,RXA,IRTXA, DTRA D 7:0 IR 1.0/ TX & RX 1.1 DSRA , RTSA IOR ENDEC CTSA ,CDA ,RIA IOW BRG CSA 64 Byte RX FIFO CSB CSC Host CSD Interface INTA UART-B INTB INTC UART-C INTD TXRDY A-D TXD,RXD,IRTXD,DTRD RXRDY A-D DSRD , RTSD UART-D 16/68 CTSD ,CDD ,RID INTSEL CLKSEL FSRS XTAL1 Crystal OSC/Buffer XTAL2 CHCCLK www.diodes.com April 2019 PI7C9X754 2 Diodes Incorporated Document Number DS40311 Rev 5-2