Instruction Manual

22 Introduction
1.7.5 SUMIT Connector
SUMIT is a connection protocol that integrates common high-and
low-speed serial and legacy expansion buses for dedicated use. A
compact, stackable, multiboard I/O expansion solution, the SUMIT
connector supports one x1 PCI Express lane, one x4 PCI Express
lane, and additional power, ground and control signals. Pin defini-
tions are as follows.
Table 1-16: SUMIT Pin Definitions
Pin Description Pin Description
1 GND 27 PCIex4_TX2+
2 GND 28 PCIex4_RX2+
3 PCIex1_TX+ 29 PCIex4_TX2-
4 PCIex1_RX+ 30 PCIex4_RX2-
5 PCIex1_TX- 31 GND
6 PCIex1_RX- 32 GND
7 GND 33 PCIex4_TX3+
8 NC 34 PCIex4_RX3+
9 PCIex4_CLK+ 35 PCIex4_TX3-
10 PCIex1_CLK+ 36 PCIex4_RX3-
11 PCIex4_CLK- 37 GND
12 PCIex1_CLK- 38 GND
13 NC 39 PERST#
14 GND 40 WAKE#
15 PCIex4_TX0+ 41 +V12
16 PCIex4_RX0+ 42 +V12
17 PCIex4_TX0- 43 +V5
18 PCIex4_RX0- 44 +V12
19 GND 45 +V5
20 GND 46 +V3.3
21 PCIex4_TX1+ 47 +V5
22 PCIex4_RX1+ 48 +V3.3
23 PCIex4_TX1- 49 +V5
24 PCIex4_RX1- 50 +V3.3
25 GND 51 +V5
26 GND 52 +V5SB