Hi-Speed USB to 10/100 Ethernet Bridge with 1 UART
The XR22801 is a Hi-Speed USB 2.0 compound device with an embed-
ded hub and 4 downstream USB functions: 10/100 Ethernet MAC and
PHY, UART, multi-master capable I2C controller, and an Enhanced Dedi-
cated GPIO Entity (EDGE) controller.
The upstream USB interface has an integrated USB 2.0 PHY and device
controller that is compliant with both Hi-Speed (480Mbps) and Full-Speed
(12Mbps) USB 2.0. The vendor ID, product ID, power mode, remote
wakeup support and maximum power consumption are amongst the val-
ues that can be programmed using the on-chip One-Time Programmable
The 10/100 Ethernet MAC and PHY is compliant with IEEE 802.3 and
supports auto-negotiation, auto-MDIX, checksum offload, auto-polarity
correction in 10Base-T and remote wakeup capabilities.
The enhanced UART has a maximum data rate of 15 Mbps. Using a frac-
tional baud rate generator, any baud rate between 300 bps and 15 Mbps
can be accurately generated. In addition, the UART has a large 1024-byte
TX FIFO and RX FIFO to optimize the overall data throughput for various
applications. The automatic RS485 control feature simplifies both the
hardware and software for half-duplex RS-485 applications. If required,
the multi-drop (9-bit) mode feature further simplifies typical multi-drop
applications by enabling / disabling the UART receiver depending on the
address byte received.
The multi-master capable I2C controller and EDGE controller (up to 16
GPIOs) can be accessed via the USB HID interface. The EDGE pins or
I2C interface can be used for controlling and monitoring other peripherals.
Up to 2 EDGE pins can be configured as a PWM generator.
USB 2.0 Compliant Interface
10/100 Ethernet MAC and PHY
Enhanced Dedicated GPIO Entity (EDGE)
Single +5.0V Power Supply Input
Regulated +3.3V Output Power
Single 25MHz Crystal
±15kV HBM ESD Protection on USB data
±8kV HBM ESD Protection on all other pins
USB CDC-ACM, CDC-ECM and HID
Custom Software Drivers
USB to Ethernet Dongles
Factory Automation and Process Controls
Ordering Information – Back Page
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