1.. _max3421e_shield:
2
3MAX3421E Shield
4###############
5
6Overview
7********
8
9Support for expansion boards (shields) based on MAX3421E USB Peripheral/Host
10controller.
11
12Sparkfun USB Host Shield
13************************
14
15Pins Assignment of the Shield Connector
16=======================================
17
18+-----------------------+-----------------------+-----------------------------+
19| Shield Connector Pin  | Function              | MAX3421E Pin                |
20+=======================+=======================+=============================+
21| D0                    | not connected         |                             |
22+-----------------------+-----------------------+-----------------------------+
23| D1                    | not connected         |                             |
24+-----------------------+-----------------------+-----------------------------+
25| D2                    | not connected         |                             |
26+-----------------------+-----------------------+-----------------------------+
27| D3                    | not connected         |                             |
28+-----------------------+-----------------------+-----------------------------+
29| D4                    | not connected         |                             |
30+-----------------------+-----------------------+-----------------------------+
31| D5                    | not connected         |                             |
32+-----------------------+-----------------------+-----------------------------+
33| D6                    | not connected         |                             |
34+-----------------------+-----------------------+-----------------------------+
35| D7                    | RESET pin             |                             |
36+-----------------------+-----------------------+-----------------------------+
37| D8                    | not connected         |                             |
38+-----------------------+-----------------------+-----------------------------+
39| D9                    | INTn                  | 24 (Interrupt Output)       |
40+-----------------------+-----------------------+-----------------------------+
41| D10                   | SPI CSn               | 34 (SPI Chip Select)        |
42+-----------------------+-----------------------+-----------------------------+
43| D11                   | SPI MOSI              | 36 (SPI Serial Data Input)  |
44+-----------------------+-----------------------+-----------------------------+
45| D12                   | SPI MISO              | 35 (SPI Serial Data Out)    |
46+-----------------------+-----------------------+-----------------------------+
47| D13                   | SPI SCK               | 37 (SPI Serial Clock Input) |
48+-----------------------+-----------------------+-----------------------------+
49| D14                   | not connected         |                             |
50+-----------------------+-----------------------+-----------------------------+
51| D15                   | not connected         |                             |
52+-----------------------+-----------------------+-----------------------------+
53
54Programming
55***********
56
57Set ``-DSHIELD=sparkfun_max3421e`` when you invoke ``west build`` or ``cmake``
58in your Zephyr application.
59