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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 |
| + | |
| + | == Jumpers == |
| + | |
| + | {| class="wikitable" |
| + | ! Name |
| + | ! Default |
| + | ! Function |
| + | |- |
| + | | J2 |
| + | | 1 & 2 (down) |
| + | | 1 & 2 (down): VCC_OUT to VCC_TRANS<br/>2 & 3 (up): VCC_USB to VCC_TRANS |
| + | |- |
| + | | J3 |
| + | | |
| + | | pins map to DE9 connector, except pin 5 (GND) is skipped |
| + | |- |
| + | | J4 |
| + | | |
| + | | 47k pull-ups to VCC_TRANS for jumpering to J18 |
| + | |- |
| + | | J10 |
| + | | 1 & 2 (right) |
| + | | 1 & 2 (right): VCC_USB to VCC_UART<br/>2 & 3 (left): VCC_3V3 to VCC_UART |
| + | |- |
| + | | J11 |
| + | | (not present) |
| + | | 1 & 2 (left): VCC_OUT to VIO<br/>2 & 3 (right): VIO_EXTERNAL to VIO |
| + | |- |
| + | | J12 |
| + | | 1 & 2 (down) |
| + | | 1 & 2 (down): GPIO7/!RI/!RWK to SW1 button<br/> 2 & 3 (up): GPIO7/!RI/!RWK to !RI_TRANS |
| + | |- |
| + | | J13 |
| + | | 2 & 3 (left) |
| + | | 1 & 2 (right): VIO to VCC<br/>2 & 3 (left): VCC_OUT to VCC |
| + | |- |
| + | | J15 |
| + | | 2 & 3 (up) |
| + | | 1 & 2 (down):<br/>2 & 3 (up) |
| + | |- |
| + | | J17 |
| + | | 2 & 3 (up) |
| + | | 1 & 2 (down): TXT_MODE1 to TXT<br/>2 & 3 (up): pullup/D1 LED to TXT |
| + | |- |
| + | | J18 |
| + | | ??? |
| + | | TODO |
| + | |- |
| + | | J19 |
| + | | (not present) |
| + | | 1 & 2: connects the regulated 3.3V from the SP6260 to the VCC pin of the XR21B1420 |
| + | |- |
| + | | J20 |
| + | | 1 & 2 |
| + | | 1 & 2: GPIO9/!DSR to !DSR (transceiver) NOTE: manual claims GPIO2? schematic says GPIO9... |
| + | |- |
| + | | J21 |
| + | | |
| + | | 1 & 2 (down): XEN to J37 pin 3 <br/>2 & 3 (up): !RTS_XEN to J37 pin 3 |
| + | |- |
| + | | J23 |
| + | | |
| + | | ...<br/>3 & 4: VCC_USB to !RESET</br>... |
| + | |- |
| + | | J24 |
| + | | |
| + | | (various debug signals) |
| + | |- |
| + | | J37 |
| + | | |
| + | | ...<br/>3 & 4 (2nd from left): XEN or !RTS_XEN to DIR1</br>... |
| + | |} |
| | | |
| == Software == | | == Software == |
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| [https://www.maxlinear.com/support/design-tools/software-drivers Software Drivers - MaxLinear] | | [https://www.maxlinear.com/support/design-tools/software-drivers Software Drivers - MaxLinear] |
| | | |
− | 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": | + | In the "USB UART" section in their downloads table, pick the latest version for Linux. Here is a direct link to version 1D for "Linux 3.6.x and newer": |
| + | |
| + | [https://assets.maxlinear.com/web/documents/xr_usb_serial_common_lnx-3.6-and-newer-pak_v1d.zip xr_usb_serial_common_lnx-3.6-and-newer-pak_v1d.zip] |
| | | |
− | [https://www.maxlinear.com/content/document.ashx?id=21651 xr_usb_serial_common_lnx-3.6-and-newer-pak.zip] | + | <del>[https://www.maxlinear.com/content/document.ashx?id=21651 xr_usb_serial_common_lnx-3.6-and-newer-pak.zip]</del> (1C was superseded by 1D) |
| | | |
| 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. | | 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. |