Wiimote/Extension Controllers/Classic Controller Pro

The Classic Controller Pro functions near-identically to the original classic controller. In terms of hardware, the major difference is the replacement of the two analog triggers (LT and LR) with two digital buttons.

Data Format

The Classic Controller Pro supports three versions of data format: 0x01, 0x02 and 0x03 (register at address 0x(4)A400FE). This register is writable, so you can select data format. The default data format code is 0x01.

Data Format 0x01

The Classic Controller Pro reports its information as 6 bytes of data, readable at 0x(4)A40008 and streamable using Data Reporting Modes that include Extension bytes (unused bytes are filled with 0x00). The data is packed into the six bytes as follows (after decryption):

	Bit
Byte	7	6	5	4	3	2	1	0
0	RX<4:3>		LX<5:0>
1	RX<2:1>		LY<5:0>
2	RX<0>	LT<4:3>		RY<4:0>
3	LT<2:0>			RT<4:0>
4	BDR	BDD	BLT	B-	BH	B+	BRT	1
5	BZL	BB	BY	BA	BX	BZR	BDL	BDU

LX,LY are the left Analog Stick X and Y (0-63), RX and RY are the right Analog Stick X and Y (0-31), and LT and RT are the Left and Right Buttons (0 **OR** 31). The left Analog Stick has twice the precision of the other analog values.

BD{L,R,U,D} are the D-Pad direction buttons. B{ZR,ZL,A,B,X,Y,+,H,-} are the discrete buttons. B{LT,RT} are the digital button click of LT and RT. All buttons are 0 when pressed.

Data Format 0x02

The main difference from the data format 0x01 is that the Analog Sticks and Triggers have much higher precision: 10 bits (0-1023) and 8 bits (0-255). The Classic Controller Pro reports its information as 9 bytes of data, readable at 0x(4)A40008 (after decryption):

	Bit
Byte	7	6	5	4	3	2	1	0
0	LX<9:2>
1	RX<9:2>
2	LY<9:2>
3	RY<9:2>
4	RY<1:0>		LY<1:0>		RX<1:0>		LX<1:0>
5	LT<7:0>
6	RT<7:0>
7	BDR	BDD	BLT	B-	BH	B+	BRT	1
8	BZL	BB	BY	BA	BX	BZR	BDL	BDU

LX,LY are the left Analog Stick X and Y (0-1023), RX and RY are the right Analog Stick X and Y (0-1023), and LT and RT are the Left and Right Buttons (0 **OR** 255).

BD{L,R,U,D} are the D-Pad direction buttons. B{ZR,ZL,A,B,X,Y,+,H,-} are the discrete buttons. B{LT,RT} are the digital button click of LT and RT. All buttons are 0 when pressed.

Data Format 0x03

Data format 0x03 is the same as 0x02 but there is no unknown value byte. So, the Classic Controller Pro reports its information as 8 bytes of data, readable at 0x(4)A40008 (after decryption):

	Bit
Byte	7	6	5	4	3	2	1	0
0	LX<7:0>
1	RX<7:0>
2	LY<7:0>
3	RY<7:0>
4	LT<7:0>
5	RT<7:0>
6	BDR	BDD	BLT	B-	BH	B+	BRT	1
7	BZL	BB	BY	BA	BX	BZR	BDL	BDU

LX,LY are the left Analog Stick X and Y (0-255), RX and RY are the right Analog Stick X and Y (0-255), and LT and RT are the Left and Right Buttons (0 **OR** 255).

BD{L,R,U,D} are the D-Pad direction buttons. B{ZR,ZL,A,B,X,Y,+,H,-} are the discrete buttons. B{LT,RT} are the digital button click of LT and RT. All buttons are 0 when pressed.

Calibration

Nintendo games calibrate the center position of the Analog Sticks upon power-up or insertion of the Classic Controller Pro.

Hardware

The classic controller pro uses several different hardware parts for its various inputs.

Input	Hardware	Circuit board surface and mounting
A	membrane switch	top
B	membrane switch	top
-	microswitch	top
Home	microswitch	top
+	microswitch	top
X	membrane switch	top
Y	membrane switch	top
Up	membrane switch	top
Down	membrane switch	top
Left	membrane switch	top
Right	membrane switch	top
Left joystick X	axial potentiometer, 30KΩ	daughterboard, through-hole
Left joystick Y	axial potentiometer, 30KΩ	daughterboard, through-hole
Right joystick X	axial potentiometer, 30KΩ linear	daughterboard, through-hole
Right joystick Y	axial potentiometer, 30KΩ linear	daughterboard, through-hole
L	switch
R	switch
ZL
ZR