Olympus M:Robe 500 Port Pin Assignments

GPIO

Pin	Function	Dir	Inverted	IRQ	Edge	Comments	Init in Rockbox
0		In		IRQ	Any	Power Button (active low)
1		In		IRQ	Falling
2		Out				USB: Renesas RST_N	x
3		In		IRQ	Falling	USB: Renesas INT	x
4		Out				OF sets low - setting high power up 4mA
5		Out				OF sets low - setting high power up 23mA
6		Out				OF sets low - setting high=no effect - no power change
7		Out				OF sets high - setting low=no effect - no power change
8		In		IRQ	Falling	Pulses low on USB insert independent of Renesas status
9		In		IRQ	Falling
10		Out				ATA: HDD Reset? (active low)	x
11		In	Inverted	IRQ	Any	ATA: HDD INT	x
12		Out				SPI: RTC Chip Select (348A pin CE)	x
13		In		IRQ
14		In		IRQ		ADC: TS INT (active low)	x
15		Out				ADC: TS nPWD? - setting low reduces power by ~5mA	x
16		Out				OF sets low - setting high power up 3 mA
17		Out				POWER: HDD Power (active low)	x
18		Out				SPI: TS Chip Select (active low; TSC 2100 pin ~SS)	x
19		Out				PhotoLight Enable active high - power up ~120 mA
20		Out				OF sets low - setting high power up 2 mA
21		Out				OF sets high - setting low=no effect - no power change
22		Out				OF sets high - setting low=no effect - no power change
23		Out				OF sets low - setting high >100mA increase in power?
24		In
25		In				POWER: Charger Status (active low)	x
26		Out				POWER: ALL OFF (active high) (press power twice to turn back on)	x
27	UART1_RX	In				UART: RX for Remote	x
28	UART1_TX	Out				UART: TX for Remote	x
29		Out				SPI: Backlight Chip Select (active low)	x
30	I2C _CLK	Out
31	I2C _DATA	In
32		Out				LCD: Front LED active high - power up 7 mA	x
33		Out				Clicking noise?? Camera shutter?	(need to find initial value)
34	R2	Out				LCD: Red bit 2 for 18 bit mode	x
35		Out				LCD: Resolution (MO)	x
36		Out				LCD: Power enable (low==off) (INI?)	x
37		Out				LCD: Backlight and LCD OFF - same as other power down	x
38	B2	Out				LCD: Blue bit 2 for 18 bit mode	x
39		Out				LCD: Appears to be related to composite output	x
40		Out				OF sets low - setting high power up 90 mA

Cradle/USB IO

Order: on the player and at the back of the cradle, pin 1 is the rightmost pin. 18 is closest to the remote connector on the player.

Pin	USB cable Color	Cradle->USB	Player->Cradle	Comments
1	red	VBUS	VBUS
2	red	VBUS	VBUS
3				GND in player
4			DC 5V
5			DC 5V
6	white	D-	D-
7			AV GND	Outer sleeve of AV connector
8			Video	Middle ring of AV connector
9			Audio Left	Tip of AV connector
10			Audio Right	Forward ring of AV connector
11			Unknown
12			DC 5V
13	green	D+	D+
14			GND(?)	GND in player
15		connected	unknown	apparently important
16		connected	unknown	apparently important
17	black	GND	GND
18	black	GND	GND