HSSTP Description
The High Speed Serial Trace Port [HSSTP] specification uses the connector defined in the HSSTP specification, the Aurora protocol developed by Xilinx and the electrical interface defined by XAUI. Refer to the main HSSTP page covering the standard.
Four dual-row connector sizes are allowed; 22-pins, 34-pins, 46-pins and 70-pins.
The 70-pin HST-D70 connector [covered here], provides eight differential transmit pairs, four differential receive pairs, a Vsense line, five JTAG pins, six optional Vendor I/O pins, a Reset line and an optional differential clock line.
Six pairs of reserved pins are called out for this size connector.
Ground pins are also supplied per differential pair, which are longer and mate first.
The Vendor I/O pins are SoC specific and are not defined in the HSSTP specification.
The pinout variations are provided below, shown by number of pins.
HSSTP HST-D70 Pinouts & Signal Assignments
23 x 2 | ||||
Pin Num | Signal name | Signal name | Pin Num | |
Latch | GND | GND | Latch | |
1 | TX0+ | VIO (Vsense) | 2 | |
3 | TX0- | TCK | 4 | |
5 | GND | TMS | 6 | |
7 | TX1+ | TDI | 8 | |
9 | TX1- | TDO | 10 | |
11 | GND | TRST | 12 | |
13 | RX0+ | Vendor I/O 0 | 14 | |
15 | RX0- | Vendor I/O 1 | 16 | |
17 | GND | Vendor I/O 2 | 18 | |
19 | RX1+ | Vendor I/O 3 | 20 | |
21 | RX1- | Reset | 22 | |
23 | GND | GND | 24 | |
25 | TX2+ | CLK+ | 26 | |
27 | TX2- | CLK- | 28 | |
29 | GND | GND | 30 | |
31 | TX3+ | Vendor I/O 4 | 32 | |
33 | TX3- | Vendor I/O 5 | 34 | |
35 | GND | GND | 36 | |
37 | RX2+ | Reserved | 38 | |
39 | RX2- | Reserved | 40 | |
41 | GND | GND | 42 | |
43 | RX3+ | Reserved | 44 | |
45 | RX3- | Reserved | 46 | |
47 | GND | GND | 48 | |
49 | TX4+ | Reserved | 50 | |
51 | TX4- | Reserved | 52 | |
53 | GND | GND | 54 | |
55 | TX5+ | Reserved | 56 | |
57 | TX5- | Reserved | 58 | |
59 | GND | GND | 60 | |
61 | TX6+ | Reserved | 62 | |
63 | TX6- | Reserved | 64 | |
65 | GND | GND | 66 | |
67 | TX7+ | Reserved | 68 | |
69 | TX7- | Reserved | 70 | |
Latch | GND | GND | Latch |
HSSTP Connector Pinout Variants
The HST-D70 is the largest connector used by HSSTP.
Although a 75 pin connector is the largest in the series.
Simplex 11 x 2 HSSTP, 4 differential TX lines.
Simplex 17 x 2 HSSTP, 6 differential TX lines.
Simplex 23 x 2 HSSTP, 8 differential TX lines.
Duplex 11 x 2 HSSTP, 2 differential TX lines, 2 differential RX lines.
Duplex 17 x 2 HSSTP, 4 differential TX lines, 2 differential RX lines.
Duplex 23 x 2 HSSTP, 4 differential TX lines, 4 differential RX lines.
Duplex 35 x 2 HSSTP, 8 differential TX lines, 4 differential RX lines.
In this revision the 6 pairs of reserved pins are not to be used.