The "SD card creation" section from the "from scratch" page also provides information to use the u-boot, kernel image, and Devuan root filesystem I built.
On the J3 connector (3 pins male 2.54mm, next to the Ethernet connector, pin 1 on the board edge) :
pin 1 - GND : Black
pin 2 - UART RX : Orange
pin 3 : UART TX : Yellow
SD card boot
The OrangePi Zero board boots from the SD card which has to be prepared following specific steps. Follow the "SD card creation" section from the "from scratch" page
Extension ports
The OrangePi Zero board has two extension ports using common 2.54mm (0.1inch) pitch:
con4 : 2x13
con5 : 1x13
Orange Pi Zero Expansion Header
con4 : 2x13 Header
1
3.3V
2
5V
3
TWI0_SDA / PA12 / GPIO12
4
5V
5
TWI0_SCK / PA11 / GPIO11
6
GND
7
PWM1 / PA06 / GPIO6
8
UART1_TX / PG06 / GPIO198
9
GND
10
UART1_RX / PG07 / GPIO199
11
UART2_RX / PA01 / GPIO1
12
SIM_CLK/PA_EINT7 / PA07 / GPIO7
13
UART2_TX / PA00 / GPIO0
14
GND
15
UART2_CTS / PA03 / GPIO3
16
TWI1-SDA / PA19 / GPIO19
17
3.3V
18
TWI1-SCK / PA18 / GPIO18
19
SPI1_MOSI / PA15 / GPIO15
20
GND
21
SPI1_MISO / PA16 / GPIO16
22
UART2_RTS / PA02 / GPIO2
23
SPI1_CLK / PA14 / GPIO14
24
SPI1_CS / PA13 / GPIO13
25
GND
26
SIM_DET/PA_EINT10 / PA10 / GPIO10
con5 1x13 Header
1
5V
2
GND
3
USB-DM2
4
USB-DP2
5
USB-DM3
6
USB-DP3
7
LINEOUTR
8
LINEOUTL
9
TV-OUT
10
MIC-BIAS
11
MIC1P
12
MIC1N
13
CIR-RX
External links
(Pseudo)random list of links to pages with information to compile u-boot, the Linux kernel, and create a root filesystem.
Linux Sunxi Wiki : Orange Pi Zero(open source software community dedicated to providing open source operating system support for Allwinner SoC based devices).
