6 Signal Descriptions and Pinout Tables
The following section describes the signals found on the four X connectors located on
the bottom of the module. X1, X3, and X4 connectors are ETX
®
standard compliant
while the X2 connector complies with the XTX
TM
extension specification.
This table describes the terminology used in this section for the Signal Description
tables. The PU/PD column indicates if an XTX
®
internal pull-up or pull-down resistor has
been used. If the field entry area in this column for the signal is empty, then no pull-up
or pull-down resistor has been implemented. The “#” symbol at the end of the signal
name indicates that the active or asserted state occurs when the signal is at a low
voltage level. When “#” is not present, the signal is asserted when at a high voltage
level.
Table 2
Signal Tables Terminology Descriptions
Term
Description
PU
XTX
®
Internally implemented Pull up resistor
PD
XTX
®
Internally implemented Pull down resistor
I/O 3.3V
Bi-directional signal 3.3V tolerant
I/O 5V
Bi-directional signal 5V tolerant
I 3.3V
Input 3.3V tolerant
I 5V
Input 5V tolerant
I/O 3.3VSB
Input 3.3V tolerant active in standby state
O 3.3V
Output 3.3V signal level
O 5V
Output 5V signal level
P
Power Input/Output
DDC
Display Data Channel
PCIE
In compliance with PCI Express Base Specification, Revision 1.0a
SATA
In compliance with Serial ATA specification, Revision 1.0a
LVDS
Low Voltage Differential Signal-350mV nominal; 450mV maximum differential signal
TPM
Trusted Platform Module
6.1 X1 Connector Signal Descriptions
Table 3
Signal Descriptions
Signal
Description
I/O
PU/PD Comment
VCC
Power 5VDC ±5%
P
External supply
GND
Power Ground
P
External supply
3V
Power 3.3VDC
P
See section 4.1.4
N.C.
Not Connected
N.A.
Do not connect
SERIRQ
Serial Interrupt request
I
Used in conjunction with LPC bus
Copyright © 2006 congatec AG
X800m12
31/72
