.. SPDX-License-Identifier: GPL-2.0-or-later

Connectors
==========

There's a handful of connectors on the Dell Wyse 3020 board.

.. image:: board.png
  :width: 697
  :alt: WLoader information screen

The UART1 serial port can be easily accessed via 0.1" pitch pin header on
CN4502. UART3 and UART4 could possibly be accessed by connecting a 0.05"
pich 16-pin flat cable to CN17 but the pin controller needs to be told to
route the UART functions there (it defaults to GPIO). Probably not worth it.

JTAG can be accessed via CN4501.

Some of the pins have not been identified, but there can hardly be anything
too useful.

CN4501
------

Connector near the front. Pin 1 also faces front of the machine.
Marked on the PCB as follows::

  CN4501
  DEBUG
  CONN2

==========      ========
Pin Number      Function
==========      ========
1               GPIO_52
2               GPIO_51
3               GND
4
5               JTAG_TDI
6               JTAG_TMS
7               JTAG_TCK
8               JTAG_TCK
9               JTAG_TDO
10              RESET#
11              GND
12
13
14              +3V
15              GPIO_64
16
==========      ========

CN4502
------

Pin 1 faces front of the machine.
Marked on the PCB as follows::

  CN4502
  DEBUG
  CONN1

==========      ========
Pin Number      Function
==========      ========
1
2               GPIO_69
3               GND
4               UART1_RX
5               UART1_TX
==========      ========

CN17
----

Pin 1 faces front of the machine.

==========      ========
Pin Number      Function
==========      ========
1               GPIO_115
2               GPIO_116
3
4               GPIO_117
5               GPIO_118
6               GPIO_119
7               GPIO_120
8               GPIO_121
9               GPIO_122
10
11
12
13
14
15
16
==========      ========