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XR16M2750IM48-F Datasheet(PDF) 1 Page - Exar Corporation |
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XR16M2750IM48-F Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 53 page  Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com XR16M2750 1.62V TO 3.63V HIGH PERFORMANCE DUART WITH 64-BYTE FIFO AUGUST 2007 REV. 1.0.0 GENERAL DESCRIPTION The XR16M27501 (M2750) is a high performance dual universal asynchronous receiver and transmitter (UART) with 64 byte TX and RX FIFOs. The device operates from 1.62 to 3.63 volts and is pin-to-pin compatible to Exar’s ST16C2550 and XR16V2750. The M2750 register set is identical to the XR16V2750 and is compatible to the ST16C2550 and the XR16C2850 enhanced features. It supports the Exar’s enhanced features of programmable FIFO trigger level and FIFO level counters, automatic hardware (RTS/CTS) and software flow control, automatic RS-485 half duplex direction control output and a complete modem interface. Onboard registers provide the user with operational status and data error flags. An internal loopback capability allows system diagnostics. Independent programmable baud rate generators are provided in each channel to select data rates up to 8 Mbps at 3.3 Volt and 8X sampling clock. The M2750 is available in 48-pin TQFP and 32-pin QFN packages. NOTE: 1 Covered by U.S. Patent #5,649,122 APPLICATIONS • Portable Appliances • Telecommunication Network Routers • Ethernet Network Routers • Cellular Data Devices • Factory Automation and Process Controls FEATURES • 1.62 to 3.63 Volt Operation • Pin-to-pin compatible to Exar’s XR16V2750 and TI’s TL16C752B in the 48-TQFP package • Two independent UART channels ■ Data rate of up to 8 Mbps at 3.3 V ■ Data rate of up to 6.25 Mbps at 2.5 V ■ Data rate of up to 4 Mbps at 1.8 V ■ Fractional Baud Rate Generator ■ Transmit and Receive FIFOs of 64 bytes ■ Programmable TX and RX FIFO Trigger Levels ■ Transmit and Receive FIFO Level Counters ■ Automatic Hardware (RTS/CTS) Flow Control ■ Selectable Auto RTS Flow Control Hysteresis ■ Automatic Software (Xon/Xoff) Flow Control ■ Automatic RS-485 Half-duplex Direction Control Output via RTS# ■ Wireless Infrared (IrDA 1.0) Encoder/Decoder ■ Automatic sleep mode ■ Full modem interface • Device Identification and Revision • Crystal oscillator (up to 24MHz) or external clock (upto 64MHz) input • 48-TQFP and 32-QFN packages FIGURE 1. XR16M2750 BLOCK DIAGRAM XTAL1 XTAL2 Crystal Osc/Buffer TXA, RXA, DTRA#, DSRA#, RTSA#, DTSA#, CDA#, RIA#, OP2A# 8-bit Data Bus Interface UART Channel A 64 Byte TX FIFO BRG IR ENDEC TX & RX UART Regs 1.62 to 3.6 Volt VCC GND 2750BLK TXB, RXB, DTRB#, DSRB#, RTSB#, CTSB#, CDB#, RIB#, OP2B# UART Channel B (same as Channel A) A2:A0 D7:D0 CSA# CSB# INTA INTB IOW# IOR# Reset TXRDYA# TXRDYB# RXRDYA# RXRDYB# 64 Byte RX FIFO |
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