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+[[:english|{{ :hardware.png}}]][[:english|{{ :rocrail-logo-35.png}}]]
+[[:wio:wio-multicast-fr|{{ icons:fr.png|French Version}}]][[:wio:wio-multicast-en|{{ icons:uk.png|English Version}}]]
+====== WIO Display Multiplex======
+[[:wio:overview-en|{{ :wio:wiologo.png}}]]
+**[[:wio:overview-en|WIO Overview]]**
+  * [[:arduino:wio-setup-en|WIO Setup]] | [[:arduino:wioctrl-en|WIO Control]] | [[:arduino:amp-en|User Bitmaps]] | [[:arduino:wio-en|WIO Firmware]] | [[:arduino:wio-mobile-en|WIO Mobile]] | [[:arduino:wio-cable-en|Cable]] | [[:wio:wio-ledscript-en|LEDScript]] | [[:wio:wio-ioscript-en|IOScript]] | [[:wio:wiopi-en|WIOpi]]
+  * [[:wio:wio03-io16-en|WIOesp32 16 I/O]]
+  * [[:wio:neopixel-en|NeoPixel 'Cheat Sheet']]
+  * [[:wio:wio-multicast-en|WIO Multicast]]
+  * **[[:wio:wio-displaymultiplex-en|WIO Display Multiplex]]**
+  * [[:arduino:wio-ampchar-en|AMP Characters]]
+ \\
+{{ :wio:multidisplay.jpg?400}}{{ :wio:tca9548a.jpg?200}}
+ \\
+=====Introduction=====
+On most Display break-out boards the I2C address cannot be changed.\\
+Up to 8 displays on the same address can be multiplexed with a TCA9548A chip on I2C address 0x72.\\
+If beside 0x72 also 0x73 is available as multiplexer, up to 16 displays will be supported.\\
+ \\
+===== Setup =====
+==== TCA9548A I2C address ====
+I2C address 0x70 is default for the TCA9548A, but is also in use by [[:arduino:wio-en#segment_display_ht16k33|7-Segment displays]].\\
+The address pins should be connected as follows:
+^ Multiplexer ^ I2C Address ^ A0 ^ A1 ^ A2 ^ Rocrail displays ^
+|  1  |  0x72  | open | VIN(+) | open | 1...8 |
+|  2  |  0x73  | VIN(+) | VIN(+) | open | 9...16 |
+The 16 displays should be all the of the same type,\\
+ \\
+==== WIO ====
+If I2C address 0x72 is available at start up, the WIO will switch to multiplexing 8 or 16 SSD1306 on the I2C addresses 0x3C.\\
+In this mode address 0x3D, for the second display, will be ignored.\\
+ \\
+==== Rocrail ====
+The Bus is used for the WIO ID, and the Display number for selecting between 1...16. (16 * 0x3C)\\
+Fast clock and scrolling is not supported in multiplex mode.\\