SNES controller interface - marcosassis/gamepaduino GitHub Wiki

`SNES | Super Nintendo | Super Famicom` `controllers``communication protocol and pinout`

`The SNES gamepad!`

physical interface - connector pins

 _________________
| o o o o | o o o )  looking into the controller cable
  1 2 3 4   5 6 7
+5V C L D   x x GND
    ↑ ↑ ↓

+5V
data clock: data driven by by console, clocks controller's shift registers
data latch: console drives when ready to read controller, latches shift registers
serial data: on each clock pulse (and after latch pulse) controller sends next button state
unused
unused
ground

communication protocol

             ->|   |<- 12us
                ___          ->| |<- 6us
data latch  ___|   |___________________________________________________________________
            _________   _   _   _   _   _   _   _   _   _   _   _   _   _   _   _   ___
data clock           |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| |_| 
            _______ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ _______________________
serial data        |_B_|_Y_|___|___|___|___|___|___|_A_|_X_|_L_|_R_| ?   ?   ?   ?  
                     0   1   2   3   4   5   6   7   8   9   10  11  12  13  14  15
button name/id              /   /    |    \   \   \
                        select start up down left right

serial data is 0V when button is pressed

example:

                ___    B and select pressed
data latch  ___|   |_________________...
            _________   _   _   _   _   
data clock           |_| |_| |_| |_| ... 
                ___     ___     _____...
serial data ___|   |___|   |___|
                   |<->| 12us