Exar Corporation XR17V254
THE XR17V254 3.3V VCC CLK (upto 66MHz) RST# AD[31:0] C/BE[3:0]# FRAME# IRDY# TRDY# DEVSEL# STOP# IDSEL PERR# SERR# PAR INTA# PME# ■ ■ ■ UART Channel 0 UART Regs BRG 64 Byte TX FIFO TX & RX IR ENDEC (5V Tolerant Serial Inputs) TX0, RX0, DTR0#, DSR0#, RTS0#, CTS0#, CD0#, RI0# 64 Byte RX FIFO UART Channel 1 PCI Local Bus Interface Device Configuration Registers UART Channel 2 UART Channel 3 Configuration Space Registers 16-bit Timer/Counter EEPROM Interface TX3, RX3, DTR3#, DSR3#, RTS3#, CTS3#, CD3#, RI3# MPIO0- MPIO7 Multi-purpose .| Part No. | XR17V254 |
|---|---|
| Datasheet | XR17V254 Download |
| Manufacturer |  Exar Corporation |
| Description | 66MHZ PCI BUS QUAD UART |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The XR17V2541 (V254) is a single chip 4-channel 66MHz PCI (Peripheral Component Interconnect) UART (Universal Asynchronous Receiver and Transmitter) solution, optimized for higher performance and lower power. The V254 device with its fifth generation register set is designed to meet the high bandwidth and power management requirements for multi-serial communication ports for system administration and management. The 32-bit 66MHz PCI interface is compliant with PCI 3.0 and PCI power management revision 1.1 specifications. The device provides an upgrade path for Exar’s 33MHz 5V and Universal PCI UART family of products in a 144-pin LQFP package. The V254 consists of four independent UART channels, each with set of configuration and enhanced registers, 64 bytes of Transmit (TX) and Receive (RX) FIFOs, and a fractional Baud Rate Generator (BRG). A global interrupt source register provides a complete interrupt status indication for all 4 channels to speed up interrupt parsing.
