GPIO

low active unless stated otherwise

		GPIO A
Port pin	Bit	I/O/F	Description
0	01	O	OF
1	02	I	BUTTON_REW
2	04	I	BUTTON_FF
3	08	I	BUTTON_PLAY
4	10	I	BUTTON_UP
5	20	I	BUTTON_DOWN
6	40	I	BUTTON_AB
7	80	I	BUTTON_RIGHT

		GPIO B
Port pin	Bit	I/O/F	Description
0	01	I	Power (USB or Cradle)
1	02	-
2	04	I	USB (1-connected)
3	08	I	Headphone (1-conected)
4	10	-
5	20	-
6	40	-
7	80	o	xx

		GPIO C
Port pin	Bit	I/O/F	Description
0	01	-
1	02	-
2	04	I	SD card inserted
3	08	o
4	10	o	low level device stuff
5	20	-
6	40	-
7	80	-	xx

		GPIO F
Port pin	Bit	I/O/F	Description
0	01	O	OF
1	02	O	OF
2	04	O	OF
3	08	O	OF
4	10	O	OF
5	20	O	OF
6	40	O	OF
7	80	O	OF

		GPIO G
Port pin	Bit	I/O/F	Description
0	01	-
1	02	-
2	04	-
3	08	-
4	10	-
5	20	-
6	40	-
7	80	I	?

		GPIO J
Port pin	Bit	I/O/F	Description
0	01	I	?
1	02	-
2	04	I
3	08	-
4	10	-
5	20	-
6	40	-
7	80	-

		GPIO K
Port pin	Bit	I/O/F	Description
0	01	-
1	02	-
2	04	-
3	08	-
4	10	-
5	20	I	BUTTON_VOL_DOWN
6	40	I	BUTTON_HOLD (1=hold)
7	80	o	xx

		GPIO L
Port pin	Bit	I/O/F	Description
0	01	-
1	02	-
2	04	-
3	08	-
4	10	-
5	20	O	xx/OF
6	40	-
7	80	-