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boards:mini [2015/01/13 23:34] – [Communications] darronboards:mini [2021/09/12 06:33] (current) – darron
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 {{:boards:promini.jpg?200}} {{:boards:promini.jpg?200}}
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 +{{:boards:pro16m.jpg?200}}
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 +{{:boards:proasp.jpg?200}}
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-This example is a Pro Mini clone with an 8 Mhz XTAL, 3V3 VREG and ATMEGA328P micro-controller.+Two examples of Pro Mini clones, one with an 8 Mhz XTAL and 3V3 VREG and the other with a 16 Mhz XTAL and 5V VREG. Both have an ATMEGA328P micro-controller.
  
 === Pinout === === Pinout ===
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 4   PD4                 PC1  A1 4   PD4                 PC1  A1
 5   PD5                 PC0  A0 5   PD5                 PC0  A0
-6   PD6                 PB5  13 +6   PD6                 PB5  13 SCK 
-7   PD7  LED    RESET   PB4  12 +7   PD7  LED    RESET   PB4  12 MISO  
-8   PB0  PB5    BUTTON  PB3  11+8   PB0  PB5    BUTTON  PB3  11 MOSI
 9   PB1                 PB2  10 9   PB1                 PB2  10
                 PC6 PC7                 PC6 PC7
             GND A6  A7             GND A6  A7
 </code> </code>
-A difference between this cheap clone and the original is it presents A6 and A7 on two extra pins. +The above pinout is for the 3V3 example. The 5V example differs in that it places A5 and A4 alongside A6 and A7 at the bottom of the diagram.
 === Power === === Power ===
-We can power the board with VCC up to 5V or utilise the RAW input which will feed the 3V3 regulator.+We can power the boards with VCC up to 5V or utilise the RAW input which will feed the regulator.
  
 === Communications === === Communications ===
-A [[:interfaces:cp2104|cp2104]] serial module is well suited to connect to the pro mini with it's built-in capacitor on DTR and is able to supply both 3V5 and 5V for VCC. The photo, top right, shows a cp2104 module in the background.+A [[:interfaces:cp2104|cp2104]] serial module is well suited to connect to the pro mini and is able to supply both 3V5 and 5V for VCC. The photos show a cp2104 module in the background.
  
 === Boot loader === === Boot loader ===
-An arduino boot loader is present on this device which communicates at 57600 baud. This is a reliable speed for a Pro Mini with an 8MHz XTAL.+An arduino boot loader is present on these devices which communicates at 57600 baud. This is a reliable speed for a Pro Mini with an 8MHz XTAL but 115200 baud can be used on the 16 MHz device if the  [[:tools:optiboot|Optiboot]] boot loader is installed.
  
-In the arduino IDE, the device is selected as an `Arduino Pro or Pro Mini (3.3V, 8 MHz) w/ ATMEGA328'.+In the arduino IDE, the 3V3 device is selected as an `Arduino Pro or Pro Mini (3.3V, 8 MHz) w/ ATMEGA328'.
  
 === ISP === === ISP ===
-This device doesn't have an ISP connector but we can wire and+The Pro Mini doesn't have an ISP connector but we can wire and
 replace the boot loader, for example, with a [[interfaces:usbasp|USBasp]]. replace the boot loader, for example, with a [[interfaces:usbasp|USBasp]].