• RS232
• RS485
• USB3
  • Type-C
• PCI-E
• HMDI
  • 19 Pins
• Channel
• DVI/HMDI

I2C¶

https://en.wikipedia.org/wiki/I%C2%B2C - differential driver: 20-100m

VCC - 3V–5V
GND - GND
SDA - Data
SCL - Clock

RS232¶

RS232簡單接法(3線)

RS485¶

Line Termination Resistor Calculator: http://www.alciro.org/tools/RS-485/RS485-resistor-termination-calculator.jsp

USB3¶

VBUS/GND: shared by USB2/3; D-/D+: USB2 only.

https://en.wikipedia.org/wiki/USB_3.0

Type-C¶

• Receptacles: 12+12 Pins
• Plugs: 12+10 Pins: B6/7 n/a & CC2 -> VCONN

Pin	Name	Description
A1/B12	GND	Ground return
A2	SSTXp1 (“TX1+”)	SuperSpeed differential pair #1, transmit, positive
A3	SSTXn1 (“TX1−”)	SuperSpeed differential pair #1, transmit, negative
A4	VBUS	Bus power
A5	CC1	Configuration channel
A6	D+	USB 2.0 differential pair, position 1, positive
A7	D−	USB 2.0 differential pair, position 1, negative
A8	SBU1	Sideband use (SBU)
A9	VBUS	Bus power
A10	SSRXn2 (“RX2−”)	SuperSpeed differential pair #4, receive, negative
A11	SSRXp2 (“RX2+”)	SuperSpeed differential pair #4, receive, positive
A12	GND	Ground return

PCI-E¶

https://en.wikipedia.org/wiki/PCI_Express#Pinout

side A: PRSNT1# shorter than the rest | side B: component side
×1/4/8/16 cards end at pin 18/32/49/82  
+12 V power: 75 W (6-pin) or 150 W (8-pin) | 300 W total (2 × 75 W + 1 × 150 W)

HDMI¶

https://en.wikipedia.org/wiki/HDMI

Type	Name	-
A	Std
C	Mini
D	Micro
E	Automotive	locking

19 Pins¶

Pin 17  Ground for ARC, CEC, DDC and HEC
Pin 18  +5 V (up to 50 mA)

Pin 1   TMDS data 2 (+)
Pin 2   TMDS data 2 ground
Pin 3   TMDS data 2 (−)

Pin 4   TMDS data 1 (+)
Pin 5   TMDS data 1 ground
Pin 6   TMDS data 1 (−)

Pin 7   TMDS data 0 (+)
Pin 8   TMDS data 0 ground
Pin 9   TMDS data 0 (−)

Pin 10  TMDS clock (+)
Pin 11  TMDS clock ground
Pin 12  TMDS clock (−)

Pin 15  SCL (I2C clock for DDC)
Pin 16  SDA (I2C data for DDC)

Pin 13  CEC / Consumer Electronic Control

Pin 14
        HDMI 1.0–1.3a: Unused
        HDMI 1.4+: ARC (+) or HEC (+)
Pin 19
        All versions: Hot plug detect
        HDMI 1.4+: ARC (−) or HEC (−)

Channel¶

• Audio Return Channel (ARC): supports stereo PCM
• HDMI Ethernet Channel (HEC): IP-based @ 100 Mbit/s

DVI/HMDI¶

DVI: http://www.alciro.org/alciro/conectores_26/conector-DVI-interfaz-visual-digital_269_en.htm

C1  Red analog  
C2  Green analog    
C3  Blue analog 
C4  Analog horizontal sync  
C5  Ground (analog) Return for analog signals

HDMI to DVI-D: http://www.alciro.org/alciro/conectores_26/patillas-cable-HDMI-a-DVI-D_274_en.htm