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XR21B1424

MaxLinear
Part Number XR21B1424
Manufacturer MaxLinear
Description Enhanced 4-Ch Full-Speed USB UART
Published Sep 1, 2018
Detailed Description XR21B1424 Enhanced 4-Ch Full-Speed USB UART General Description The XR21B1424 is an enhanced Universal Asynchronous Rec...
Datasheet PDF File XR21B1424 PDF File

XR21B1424
XR21B1424


Overview
XR21B1424 Enhanced 4-Ch Full-Speed USB UART General Description The XR21B1424 is an enhanced Universal Asynchronous Receiver and Transmitter (UART) bridge to USB interface.
The USB interface is fully compliant to the USB 2.
0 (Full-Speed) specification with 12 Mbps USB data transfer rate.
The USB interface also supports USB suspend, resume and remote wakeup operations.
The USB Vendor ID, Product ID, power mode, remote wakeup support, maximum power, and numerous other settings may be programmed in the on-chip OTP memory via the USB interface.
The XR21B1424 includes an internal oscillator and does not require an external crystal/oscillator.
Any UART baud rate from 300 bps to 12 Mbps may be generated with this internal clock and the fractional baud rate generator.
The UART pins for each port may also be configured as GPIO; direction, state, output driver type and input pull-up or pull-down resistors are programmed either through on chip OTP, or on the fly via memory mapped registers.
Large 512-byte TX and RX FIFOs prevent buffer overflow errors and optimize data throughput.
Automatic half-duplex direction control and optional multi drop (9-bit) mode simplify both hardware and software in half-duplex RS-485 applications.
Wide mode allows for each individual received character to be monitored for errors.
The XR21B1424 uses the native OS CDC-ACM driver or a MaxLinear supplied custom driver.
MaxLinear provides WHQL/HCK-certified software drivers for Windows 2000, XP, Vista, 7, 8, 8.
1 and 10 as well as software drivers for Windows CE, Linux and Mac OS X.
Full source code is available.
The XR21B1424 operates from a single 5V or 3.
3V power supply.
When powered with 5V input, a regulated 3.
3V output is supplied.
Typical Application FEATURES • ±15kV ESD on USBD+/USBD• USB 2.
0 Compliant, Full-Speed (12Mbps) • Unique pre-programmed USB serial number • Internally generated 48MHz core clock • Enhanced UART features • Baud rates from 300 bps to 12 Mbps • Fractional Baud Rate Genera...


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