DNS-323 GPIO Mapping

The following information was deduced by reading the D-Link supplied DNS323 2.6.12.6 kernel source together with empirical reverse engineering.

GPIO Pin #	GPIO Mask	Direction	Purpose
0	`0×0001`	Input	unknown
1	`0×0002`	Output	right amber LED (= sata ch0 LED) (low-active)
2	`0×0004`	Output	left amber LED (= sata ch1 LED) (low-active)
3	`0×0008`	Output	unknown
4	`0×0010`	Output	power button LED (low-active, together with pin #5)
5	`0×0020`	Output	power button LED (low-active, together with pin #4)
6	`0×0040`	Input	unknown
7	`0×0080`	Input	unknown
8	`0×0100`	Output	triggers power off (high-active)
9	`0×0200`	Input	power button switch (low-active)
10	`0×0400`	Input	reset button switch (low-active)
11	`0×0800`	Output	unknown
12	`0×1000`	Output	unknown
13	`0×2000`	Output	unknown
14	`0×4000`	Output	unknown - maybe sata ch0 blue LED
15	`0×8000`	Output	unknown - maybe sata ch1 blue LED
16-31			unknown - nothing expected

DNS323 rev.C1 has new system board and different MPP/GPIO wiring.