ALIX system board
18
5/5/2010
18
V3
+3.3V supply
19
SERIRQ
serial interrupt
20
LDRQ#
LPC DMA request
J13 / J8
I2C bus (build option)
This optional header can be used to connect user specific hardware, e.g. a front panel
microcontroller, or for a licensing dongle. See AMD CS5536 data sheet for programming details.
1
+3.3V
power supply
2
SMB_SCL
I2C clock
3
SMB_SDA
I2C data
4
GND
ground
Starting with alix.2d and alix.6c versions, the following pins have been added:
5
MODESW# same as switch S1
6
RLED1#
cathode of LED1
7
RLED2#
cathode of LED2
8
RLED3#
cathode of LED3
- / J12 / -
Headphone out (build option)
- / J13 / -
Microphone in (build option)
Only populated on alix.3*3 version. Starting with alix.3d3, this connector can also be configured to
connect to line in. Please see schematics for details, parts marked with – are not populated.
- / J11 / -
VGA (build option)
Only populated on alix.3*3 version.
1
VGAR
VGA red
2
VGAG
VGA green
3
VGAB
VGA blue
4
nc
no connect
5
GND
ground
6
GND
ground
7
GND
ground
8
GND
ground
9
USBVCC
+5V supply (fused)
10
GND
ground
11
nc
no connect
12
DDCDAT
DDC data
13
HS
horizontal sync
14
VS
vertical sync
15
DDCCLK
DDC clock
BT1 / BT1 / BT1
RTC battery (build option)
Footprint for CR2032 Lithium battery. Please observe correct polarity, top side of the battery is +
positive terminal.
For alix.3d and later, also add a jumper on J16 pins 1 to 2. This is the CMOS reset jumper for
alix.3d3.
