jianglu/shield-android-tv-reverse-engineered

#NVIDIA Shield Android TV - Reverse Engineering

Sorted by J501 pin number

J501 pin	description	mainboard pin
1	GND	R7
3	RTL8153 USB D+ (Pin 23)	Q7
5	RTL8153 USB D- (Pin 22)	P7
7	GND	X11
9	USB Jack J6 SSRX- (Pin 8)	W11
11	USB Jack J6 SSRX+ (Pin 9)	W12
13	GND	X12
15	USB Jack J5 D- (Pin 2)	X13
17	USB Jack J5 D+ (Pin 3)	W13
19	GND	S12
21	USB Jack J5 SSRX- (Pin 8)	T11
23	USB Jack J5 SSRX+ (Pin 9)	T12
25	GND	V13
27	USB Jack J7 OTG D- (Pin 2)	U12
29	USB Jack J7 OTG D+ (Pin 3)	U13
31	GND	Q6
33	HDMI Jack J3 Data 0 + (Pin 7)	Q5
35	HDMI Jack J3 Data 0 - (Pin 9)	Q4
37	GND	P4
39	HDMI Jack J3 Data 1 + (Pin 4)	P5
41	HDMI Jack J3 Data 1 - (Pin 6)	O5
43	GND	P6
45	HDMI Jack J3 Data 2 + (Pin 1)	O6
47	HDMI Jack J3 Data 2 - (Pin 3)	N6
49	GND	N5
51	HDMI Jack J3 Clock + (Pin 10)	O4
53	HDMI Jack J3 Clock - (Pin 12)	N4
55	GND	U5
57	Voltage ?	T5
59	Voltage ?	T6
61	Voltage ?	V6
63	-> Q7 (Pin 2); Q7 (Pin 3) -> J502 (Pin 8) (Levelshifting ?)	W10
65	-> Q6 (Pin 2); Q6 (Pin 3) -> J502 (Pin 4) (Levelshifting ?)	U6
67	U4 (Pin 3 and 4) (High Side USB Current Switch?)	W9
69	U5 (Pin 3 and 4) (High Side USB Current Switch?)	W8
71	Q4 (Pin 1) (Levelshifting ?)	X8
73	Q8 (unpopulated) (Levelshifting ?)	X9
75	GND	N8
77	USB Jack J6 D- (Pin 2)	N7
79	USB Jack J6 D+ (Pin 3)	O7

J501 pin	description	mainboard pin
2	GND	X5
4	microSD slot RSV/DAT1 (Pin 8)	W4
6	microSD slot MISO/DAT0 (Pin 7)	X4
8	microSD slot CLK (Pin 5)	W5
10	microSD slot MOSI/CMD (Pin 3)	X6
12	microSD slot CS/DAT3 (Pin 2)	V5
14	microSD slot RSV/DAT2 (Pin 1)	W6
16	D502 (open ?)	V7
18	GND	V4
20	-> Q5 (Pin 2); Q5 (Pin 3) -> J502 (Pin 7) (Levelshifting ?)	V11
22	U6 Pin 1 (Function ?)	V10
24	J502 (Pin 2)	X10
26	J7 OTG ID (Pin 4, through diode)	U10
28	HDMI Jack J3 CEC (Pin 13)	S6
30	HDMI Jack J3 Hot Plug Detect (Pin 19)	S5
32	HDMI Jack J3 DDC Data (Pin 16)	R6
34	HDMI Jack J3 DDC Clock (Pin 15)	R5
36	Power Button J502 (Pin 6)	S11
38	?	R12
40	?	Q12
42	?	P13
44	GND	U11
46	SATA Jack J504 (Pin 16, AC coupled)	O11
48	SATA Jack J504 (Pin 15, AC coupled)	O12
50	GND	R11
52	SATA Jack J504 (Pin 19, AC coupled)	N12
54	SATA Jack J504 (Pin 18, AC coupled)	N13
56	GND	O13
58	USB Jack J6 SSTX+ (Pin 6, AC coupled)	P11
60	USB Jack J6 SSTX- (Pin 5, AC coupled)	P10
62	GND	Q11
64	USB Jack J5 SSTX+ (Pin 6, AC coupled)	N10
66	USB Jack J5 SSTX- (Pin 5, AC coupled)	O10
68	GND	N11
70	RTL8153 USB SSRX+ (Pin 14)	N9
72	RTL8153 USB SSRX- (Pin 15)	O9
74	GND	O8
76	RTL8153 USB SSTX- (Pin 19)	P8
78	RTL8153 USB SSTX+ (Pin 18)	Q8
80	GND	P9

Sorted by mainboard pad number

marking	meaning
x	non existing pads on mainboard
u	no connection on flat flex cable (unconnected)
o	pad on mainboard but no spring on connector (open)
g	ground pads (more on mainboard than pins on J501)

	N	O	P	Q	R	S	T	U	V	W	X
13	54	g	42	u	x	x	x	29	g	17	15
12	52	48	u	40	38	g	23	27	g	11	g
11	g	46	58	g	g	36	21	g	20	9	g
10	64	66	60	u	o	x	x	26	22	63	24
9	70	72	g	u	x	x	x	x	g	67	73
8	g	g	76	78	x	x	x	x	g	69	71
7	77	79	5	3	g	x	x	x	16	g	g
6	47	45	g	g	32	28	59	65	61	14	10
5	g	41	39	33	34	30	57	g	12	8	g
4	53	51	g	35	x	x	x	u	g	4	6