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16C2850

Exar Corporation
Part Number 16C2850
Manufacturer Exar Corporation
Description DUAL UART WITH 128-byte FIFOs AND RS-485 HALF DUPLEX CONTROL
Published Mar 23, 2005
Detailed Description Preliminary Information DUAL UART WITH 128-byte FIFO’s AND RS-485 HALF DUPLEX CONTROL XR16C2850 DESCRIPTION The XR16C...
Datasheet PDF File 16C2850 PDF File

16C2850
16C2850

Overview
Preliminary Information DUAL UART WITH 128-byte FIFO’s AND RS-485 HALF DUPLEX CONTROL XR16C2850 DESCRIPTION The XR16C2850 (2850) is a dual universal asynchronous receiver and transmitter (UART).
The 2850 provides enhanced UART functions with 128 byte FIFO, automatic RS-485 half duplex control, a modem control interface, and data rates up to 1.
5 Mbps.
Onboard status registers provide the user with error indications and operational status.
System interrupts and modem control features may be tailored by external software to meet specific user requirements.
An internal loopback capability allows onboard diagnostics.
Independent programmable baud rate generators are provided to select transmit and receive clock rates up to 1.
5 Mbps.
The baud rate generator can be configured for either crystal or external clock input.
The 2850 is available in a 40-pin PDIP, 44-pin PLCC, and 48-pin TQFP packages.
The 40 pin package does not offer TXRDY and RXRDY pins (DMA Signal monitoring).
Otherwise the three package versions are the same.
The 2850 is functionally compatible with the ST16C2550.
The 2850 is fabricated in an advanced CMOS process to achieve low drain power and high speed requirements.
FEATURES • Pin and functionally compatible to ST16C2550, software compatible with INS8250, NS16C550 • 1.
5 Mbps transmit/receive operation (24 MHz Max.
).
• 128 byte transmit FIFO to reduce bandwidth requirement of the external CPU.
• 128 byte receive FIFO with error flags to reduce bandwidth requirement of the external CPU.
• Independent transmit and receive UART control.
• RS-485 half duplex control.
• Programmable transmit/receive FIFO trigger levels.
• Hardware / software flow control.
• Selectable RTS flow control hysterisis.
• Modem control signals (-CTS, -RTS, -DSR, -DTR, -RI, -CD, and software controllable line break).
• Programmable character lengths (5, 6, 7, 8) with even, odd, or no parity.
• Infrared receive and transmit encoder/decoder.
• Device identification.
• Crystal or ext...


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