Hardware¶
Push button¶
| S1 |
S3 |
S2 |
| Reset |
Bootmode / User |
Shutdown |
Extension module slot¶
The extension module slot consists of two Hirose DF9-31S connectors P11 and P12.
The power supplies are VSYS (~3.7V) and VIO (3.3V)
All signal levels except POWER_EN are VIO.
| P11 |
| Signal name |
Pin |
Signal name |
| VSYS |
1 |
2 |
|
| VSYS |
3 |
4 |
|
| VSYS |
5 |
6 |
|
| VSYS |
7 |
8 |
|
| VSYS |
9 |
10 |
|
| VSYS |
11 |
12 |
|
| VSYS |
13 |
14 |
|
| VIO |
15 |
16 |
|
| VIO |
17 |
18 |
|
| GND |
19 |
20 |
|
| GND |
21 |
22 |
|
| GND |
23 |
24 |
|
| GND |
25 |
26 |
|
| GND |
27 |
28 |
|
| GND |
29 |
30 |
|
| GND |
31 |
| P12 |
| Signal name |
Pin |
Signal name |
| POWER_EN |
1 |
2 |
VSYS |
| RESET_N |
3 |
4 |
VSYS |
| I2C_SDA |
5 |
6 |
VSYS |
| I2C_SCL |
7 |
8 |
VSYS |
| I2C_IRQ_N |
9 |
10 |
VSYS |
| VIO |
11 |
12 |
VSYS |
| GND |
13 |
14 |
VSYS |
| SPI_SCK |
15 |
16 |
VIO |
| SPI_CS |
17 |
18 |
GND |
| SPI_MOSI |
19 |
20 |
GND |
| SPI_MISO |
21 |
22 |
GND |
| SPI_IRQ |
23 |
24 |
GND |
| |
25 |
26 |
GND |
| SYNC_N |
27 |
28 |
GND |
| UART_TXD |
29 |
30 |
GND |
| UART_RXD |
31 |