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networking_communications/index.html

@@ -40,7 +40,9 @@
             <a href=hop/hello.broadhop-serial.D11C>hello.broadhop-serial.D11C</a> <a href=hop/hello.broadhop-serial.D11C.png>board</a> <a href=hop/hello.broadhop-serial.D11C.jpg>components</a> <a href=hop/hello.broadhop-serial.D11C.top.png>top</a> <a href=hop/hello.broadhop-serial.D11C.bot.png>bottom</a> <a href=hop/hello.broadhop-serial.D11C.holes.png>holes</a> <a href=hop/hello.broadhop-serial.D11C.interior.png>interior</a>
    <b><i>synchronous serial</i></b>
       <i><a name=SPI href=http://ww1.microchip.com/downloads/en/AppNotes/Atmel-2585-Setup-and-Use-of-the-SPI_ApplicationNote_AVR151.pdf>SPI</a></i>
-         SDI/SDO/CS/SCK, PICO/POCI, <s>MISO/MOSI/SS</s>
+         SDI/SDO/CS/SCK (serial data in/serial data out/chip select/serial clock)
+         PICO/POCI (peripherial in controller out, peripheral out controller in)
+         MISO/MOSI (<s>master/slave</s> &rarr; main/secondary)
          <a href=http://arduino.cc/en/Reference/SPI>library</a> <a href=https://docs.micropython.org/en/latest/library/machine.SPI.html>library</a>
          <a name="SD"></a>SD memory cards
             <a href=SD/SD.pdf>specification</a> <a href=SD/FAT.pdf>FAT</a>