// Video Connectors

Thunderbolt 1 and 2 (Mini DP)

Thunderbolt 1 and 2 use the Mini DisplayPort physical connector to combine PCIe and DisplayPort signals. Thunderbolt 1 provides 10 Gbps (two 5 Gbps channels); Thunderbolt 2 bonds them for 20 Gbps. Supports daisy-chaining up to 6 devices.

// Specifications

Standard

Thunderbolt 1 (10 Gbps) / 2 (20 Gbps)

Physical Connector

Mini DisplayPort

Protocols

PCIe + DisplayPort multiplexed

Devices

Up to 6 daisy-chained

Max Resolution

4K (TB2)

Compatible

Mini DP passive display adapters work

// Pin Reference Table

Pin	Name	Function	Type
1	GND	Ground	GND
2	HPD	Hot plug detect	I/O
3	TX0n	PCIe TX lane 0 negative	BUS
4	GND	Ground	GND
5	TX0p	PCIe TX lane 0 positive	BUS
6	GND	Ground	GND
7	RX0n	PCIe RX lane 0 negative	BUS
8	GND	Ground	GND
9	RX0p	PCIe RX lane 0 positive	BUS
10	GND	Ground	GND
11	TX1n	PCIe TX lane 1 negative	BUS
12	GND	Ground	GND
13	TX1p	PCIe TX lane 1 positive	BUS
14	GND	Ground	GND
15	RX1n	PCIe RX lane 1 negative	BUS
16	GND	Ground	GND
17	RX1p	PCIe RX lane 1 positive	BUS
18	GND	Ground	GND
19	AUX p	DP auxiliary channel positive	BUS
20	AUX n	DP auxiliary channel negative	BUS