A product Line of Diodes Incorporated PI7C9X752 High Performance 1.62V To 3.6V Dual Uart with 64-Byte FIFO Description Features e PTh I7C9X752 (752), is a 1.62V to 3.6V dual 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 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 Built in Power-On-Reset circuit Application Remote Access Servers Ethernet Network to Serial Ports Network Management Factory Automation and Process Control Point-of-Sale Systems Multi-port RS-232/RS-422/RS-485 Cards www.diodes.com October 2017 PI7C9X752 1 Diodes Incorporated Document Number DS40312 Rev 2-2 A product Line of Diodes Incorporated PI7C9X752 Block Diagram PI7C9X752 BLOCK DIAGRAM UART-A RESET 64 Byte TX FIFO UART A 2:0 Regs TXA,RXA,DTRA D 7:0 IR 1.0/ TX & RX 1.1 DSRA , RTSA IOR ENDEC CTSA ,CDA ,RIA IOW CSA BRG 64 Byte RX FIFO CSB INTA Host INTB Interface TXRDYA UART-B TXRDYB 64 Byte TX FIFO UART RXRDYA Regs RXRDYB TXB,RXB,DTRB IR 1.0/ TX & RX 1.1 DSRB , RTSB 16/68 ENDEC CTSB ,CDB ,RIB OPA BRG OPB 64 Byte RX FIFO XTAL1 Crystal OSC/Buffer XTAL2 www.diodes.com October 2017 PI7C9X752 2 Diodes Incorporated Document Number DS40312 Rev 2-2