A product Line of Pb Diodes Incorporated Lead-free Green PI7C9X798 High Performance 1.62V To 3.6V Octal Uart with 64-Byte FIFO Description Features e PTh I7C9X798 (798), is a 1.62V to 3.6V octal Universal Asyn - 1.62V to 3.6V with 5V Tolerant Serial Inputs chronous Receiver and Transmitter (UART) with 5V tolerant Single Interrupt output for all 8 UARTs serial (modem) inputs. The highly integrated device is designed A Global Interrupt Source Register for all 8 UARTs for h i g h b a ndw idt h re qu i rement i n c om mu n ic at ion s y s t em s . 5G Flat UART Registers for easier programming e gTh lobal interrupt source register provides a complete interrupt status indication for all 8 channels to speed up interrupt pars- Simultaneous Initialization of all UART channels ing. Each UART has its own 16C550 compatible set of configu - A General Purpose Command-driven 16-bit Timer/counter ration registers, TX and RX FIFOs of 64 bytes, fully program- Sleep Mode with Wake-up Indication mable transmit and receive FIFO trigger levels, TX and RX FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow Highly Integrated Device for Space Saving control with programmable hysteresis, automatic software (Xon/ Each UART is independently controlled with: Xoff) flow control, RS-485 half-duplex direction control, and 16C550 Compatible 5G Register Set auto address detection, Intel or Motorola bus interface and sleep 64-byte Transmit and Receive FIFOs mode with a wake-up indicator. 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 Application RS485 HDX Control Output Remote Access Servers RS485 auto address detection Infrared (IrDA 1.0/1.1) Data Encoder/Decoder Ethernet Network to Serial Ports Programmable Data Rate with Prescaler Network Management Up to 8 Mbps Serial Data Rate with 64MHz external clock Factory Automation and Process Control input Point-of-Sale Systems Crystal oscillator(up to 24MHz) or external clock(up to 80MHz) input Multi-port RS-232/RS-422/RS-485 Cards 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 PI7C9X798 PI7C9X798 BLOCK DIAGRAM Block Diagram QFP-100 PIN UART-0 64 Byte TX FIFO UART Regs TX0,RX0,DTR0 IR 1.0/ TX & RX 1.1 DSR0 , RTS0 ENDEC CTS0 ,CD0 ,RI0 BRG 64 Byte RX FIFO UART-1 RST Device UART-2 A 7:0 Global Ctl. Registers D 7:0 UART-3 IOR Host UART-4 Interface IOW 16-bit Timer/Counter UART-5 CS UART-6 INT TX7,RX7,DTR7 16/68 DSR7 , RTS7 UART-7 CTS7 ,CD7 ,RI7 XTAL1 Crystal OSC/Buffer XTAL2 TMRCK www.diodes.com December 2018 PI7C9X798 2 Diodes Incorporated Document Number DS40309 Rev 4-2