OLIMEX© 2015
A10-OLinuXino-LIME user's manual
LCD_VSYNC (AC9) and LCD_HSYNC (AB9)
If you inspect the schematics of a board with VGA connector (like A20-OlinuXino-MICRO)
carefully you would notice that there are two extra transistors on the synchronization lines. Those
are transistors meant to shift the levels to 5V. The 3.3V levels from the processor might work but
the standard requires 5V levels of VSYNC and HSYNC. However, if you lead the signals to a 6 pin
header (like the one on the A20 board) you might use the cable for the A20-OlinuXino-MICRO
(called A20-VGA-CABLE). The 6 signals needed are the 5 signals mentioned about plus GND.
A general advice for easier use of the microphone, headphone and VGA interfaces of A10-
OLinuXino-LIME is to take a look at the schematics of another board with those interfaces already
installed. For example, those are present in A20-OLinuXino-MICRO. Inspect the schematic
carefully.
The signal layout is described below:
GPIO-1 connector
Pin # Signal name
Processor pin
Pin # Signal name
Processor pin
1
+5V
-
2
GND
-
3
+3.3V
-
4
GND
-
5
PG0
F20
6
LRADC0
AB23
7
PG1
E21
8
LRADC1
AB22
9
PG2
E20
10
MICIN1
AC20
11
PG3
D21
12
VMIC
AA21
13
PG4
D20
14
HPOUTL
Y19
15
PG5
C21
16
HPCOM
AA19; AA20
17
PG6
E19
18
HPOUTR
W19
19
PG7
C20
20
VGA-G
AC16
21
PG8
D19
22
VGA-B
AB16
23
PG9
C19
24
VGA-R
AC17
25
PG10
D18
26
UART0-RX
B7*
27
PG11
C18
28
UART0-TX
A7*
29
PC3/SATA-PWR-EN
L22**
30
PB21
C7
31
PC18
F22
32
PB20
C8
33
PC19
L21
34
PB19
B8
35
PC20
K21
36
PB18
A8
37
PC21
J21
38
PC24
F21
39
PC22
J20
40
PC23
G19
*Signals marked with * are multiplexed with either a peripheral device or another connector. Ensure that the multiplexing is handled
properly on software and/or hardware level (else there would probably occur wrong levels, loss of data, etc).
**Pin #29 is used to control the power supply available at the 5V_SATA_PWR by default
The light blue boxes represent the pins related to microphone input.
The yellow boxes represent pins related to the headphone output.
The pale green boxes represent the pins related to alternative video output. There are more located
on the LCD connector.
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