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MaxLinear XR21B1420IL28-0A-EVB USB to RS-232/422/485 Evaluation Board (view source)
Revision as of 11:51, 31 August 2020
, 11:51, 31 August 2020added pinout table
== Wiring Diagram ==
== Wiring Diagram ==
{| class="wikitable"
! DB9 Pin
! RS-232
! RS-422
! RS-485
|-
| 1
| DCD
| TX-
| Data-
|-
| 2
| RXD
| TX+
| Data+
|-
| 3
| TXD
| RX+
|
|-
| 4
| DTR
| RX-
|
|-
| 5
| colspan="3" | (GND)
|-
| 6
| DSR
|
|
|-
| 7
| RTS
|
|
|-
| 8
| CTS
|
|
|-
| 9
| RI
|
|
|}
* [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