Difference between revisions of "MaxLinear XR21B1420IL28-0A-EVB USB to RS-232/422/485 Evaluation Board"
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* [https://www.maxlinear.com/ds/sp339e.pdf#page=5 Page 5] of the SP339E datasheet shows the DE9 pinout | * [https://www.maxlinear.com/ds/sp339e.pdf#page=5 Page 5] of the SP339E datasheet shows the DE9 pinout | ||
| − | === Bill of Materials | + | == Software == |
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| + | To get full functionality under Linux, you must install the <code>xr_usb_serial_common</code> kernel module. The drivers are available here: | ||
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| + | [https://www.maxlinear.com/support/design-tools/software-drivers Software Drivers - MaxLinear] | ||
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| + | In the "USB UART" section in their downloads table, pick the latest version for Linux. Here is a direct link to version 1C for "Linux 3.6.x and newer": | ||
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| + | [https://www.maxlinear.com/content/document.ashx?id=21651 xr_usb_serial_common_lnx-3.6-and-newer-pak.zip] | ||
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| + | If successfully installed, when the USB device (<code>04e2:1420 Exar Corp.</code>) is connected it the device node <code>/dev/ttyXRUSB0</code> should show up. | ||
| + | |||
| + | == Bill of Materials == | ||
{| class="wikitable" | {| class="wikitable" | ||
Revision as of 05:25, 13 May 2020
Overview
USB to serial evaluation board. Supports RS-232, RS-422, and RS-485. Made by MaxLinear, formerly Exar. Supposedly supports higher than usual baudrates, up to 12Mbaud.
MaxLinear XR21B1420IL28-0A-EVB | DigiKey
MaxLinear XR21B1420IL28-0A-EVB | Mouser
Wiring Diagram
- Page 5 of the SP339E datasheet shows the DE9 pinout
Software
To get full functionality under Linux, you must install the xr_usb_serial_common kernel module. The drivers are available here:
In the "USB UART" section in their downloads table, pick the latest version for Linux. Here is a direct link to version 1C for "Linux 3.6.x and newer":
xr_usb_serial_common_lnx-3.6-and-newer-pak.zip
If successfully installed, when the USB device (04e2:1420 Exar Corp.) is connected it the device node /dev/ttyXRUSB0 should show up.
Bill of Materials
| Name | Part |
|---|---|
| U2 | MaxLinear SP339ECR1-L |
| U3 | MaxLinear XR21B1420IL28-F |
Online Resources
Exar XR21B1420IL28-0A-EVB Evaluation Board User’s Manual Rev 1A
Exar XR21B1420/21 Evaluation Board Schematic Rev 1.0
Exar XR21B1420IL28-0A-EVB Evaluation Board User’s Manual Rev 1A
Exar XR21B1420/21 Evaluation Board Schematic Rev 1.0