| 1 |
PIO(0) |
I/O |
3.3V TTL |
general purpose input or output pin defined by the BASIC program |
| 2 |
PIO(1) |
I/O |
3.3V TTL |
general purpose input or output pin defined by the BASIC program |
| 3 |
PIO(2) |
I/O |
3.3V TTL |
general purpose input or output pin defined by the BASIC program |
| 4 |
PIO(3) |
I/O |
3.3V TTL |
general purpose input or output pin defined by the BASIC program |
| 5 |
PIO(4) |
I/O |
3.3V TTL |
general purpose input or output pin defined by the BASIC program |
| 6 |
PIO(5) |
I/O |
3.3V TTL |
general purpose input or output pin defined by the BASIC program |
| 7 |
SCL |
O |
3.3V TTL |
I2C bus clock, do not use |
| 8 |
SDA |
I/O |
3.3V TTL |
I2C bus clock, do not use |
| 9 |
USB_DN |
I/O |
|
USB data, do not use |
| 10 |
USB_DP |
I/O |
|
USB data, do not use |
| 11 |
PCM_CLK |
O |
3.3V TTL |
Audio PCM clock, do not use |
| 12 |
PCM_IN |
I |
3.3V TTL |
Audio PCM input, do not use |
| 13 |
PCM_SYNC |
O |
3.3V TTL |
Audio PCM sync, do not use |
| 14 |
PCM_OUT |
O |
3.3V TTL |
Audio PCM output, do not use |
| 15 |
VIN |
I |
Supply |
Module Power Supply, 3.3-16V unregulated |
| 16 |
NC |
|
|
|
| 17 |
GND |
I |
Supply |
Module Power Supply GND |
| 18 |
3V3 |
O |
Supply |
Output of 3.3V from the LDO regulator
may be used as regulated power supply input
instead of VIN |
| 19 |
NC |
|
|
|
| 20 |
BAT_PLUS |
O |
Supply |
Backup battery plus pole for the real time clock |
| 21 |
NC |
|
|
|
| 22 |
RX |
I |
3.3V TTL |
Uart, async serial input |
| 23 |
RTS |
O |
3.3V TTL |
Uart, Request To Send, hardware handshake |
| 24 |
TX |
O |
3.3V TTL |
Uart, async serial output |
| 25 |
CTS |
I |
3.3V TTL |
Uart, Clear to Send, hardware handshake
if not used, keep unconnected to tie to GND |
| 26 |
SPI_MOSI |
O |
1.8V TTL |
SPI firmware programming interface, do not use |
| 27 |
SPI_CLK |
I |
1.8V TTL |
SPI firmware programming interface, do not use |
| 28 |
SPI_CSB |
I |
1.8V TTL |
SPI firmware programming interface, do not use |
| 29 |
SPI_MISO |
I |
1.8V TTL |
SPI firmware programming interface, do not use |
| 30 |
SPI_RESET |
I |
1.8V TTL |
Reset input, active high, do not use |
| 31 |
AIO(1) |
I |
1.8V analog |
analog input for ADC 1 (depending on firmware release) |
| 32 |
AIO(0) |
I |
3.3V analog |
analog input for ADC 0 |
