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 - 2GND -

3 +3.3V - 4GND -

5 PG0 F20 6LRADC0 AB23

7 PG1 E21 8LRADC1 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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