Olimex Open Source Hardware Embedded ARM Linux Single board computer with dual core, dual GPU ALLWINNER A20 CORTEX-A7 with addi A20-OLINUXINO-MICRO-4GB 数据表

产品代码

A20-OLINUXINO-MICRO-4GB

A20-OLinuXino-MICRO user's manual

6.11 GPIO-1 (General Purpose Input/Output) 14pin connector**

The GPIO-1 plastic connector has 14 pins. 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 VOL+_BUT

AB23***

7 PG1

E21

8 VOL-_BUT

AB23***

9 PG2

E20

10 MENU_BUT

AB23***

11 PG3

D21

12 SEARCH_BUT

AB23***

13 PG4

D20

14 HOME_BUT

AB23***

15 PG5

C21

16 ESC_BUT

AB23***

17 PG6

E19

18 ENTER_BUT

AB23***

19 PG7

C20

20 TVOUT3

AB17

21 PG8

D19

22 TVIN0

AC18

23 PG9

C19

24 TVIN1

AB18

25 PG10

D18

26 TVIN2

AA17

27 PG11

C18

28 TVIN3

Y17

29 VGA_HSYNC

AB9*

30 LINEINR

AB21

31 VGA_VSYNC

AC9*

32 LINEINL

AB20

33 VGA-G

AC16*

34 FMINR

Y21

35 VGA-B

AB16*

36 FMINL

Y20

37 VGA-R

AC17*

38 MIC1OUTP

AC22

39 LRADC1

AB22*

40 MIC1OUTN

AC23

*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).

**It was erroneously named GPIO-4 in the first release of the board.
***All Android buttons are connected to an ADC (LRADC) that uses a divider to determine which button is pressed.

The yellow part of the table shows all the signals shared with the 6-pin VGA connector.

6.12 GPIO-2 (General Purpose Input/Output) 40pin connector

The GPIO pins are led out on a separate 40pin connecter. They allow the user to attach additional
hardware, check readings or perform hardware debug. The GPIO-2 connector numbers are printed
at the bottom of the board for your convenience.

Page 31 of 44