Expansion Interface
The common HackRF expansion interface consists of headers P20, P22, and P28. These headers are present on both HackRF Pro and HackRF One, and support hardware add-ons including PortaPack and Opera Cake.
P20 GPIO
Providing access to GPIO, ADC, RTC, and power.
Pin |
Function |
|---|---|
1 |
VBAT |
2 |
RTC_ALARM (One) / PB_5 (Pro) |
3 |
VCC (One) / 3V3AUX (Pro) |
4 |
WAKEUP |
5 |
GPIO3_8 |
6 |
GPIO3_0 (One) / GPIO3_9 (Pro) |
7 |
GPIO3_10 |
8 |
GPIO3_11 |
9 |
GPIO3_12 |
10 |
GPIO3_13 |
11 |
GPIO3_14 |
12 |
GPIO3_15 |
13 |
GND |
14 |
ADC0_6 |
15 |
GND |
16 |
ADC0_2 |
17 |
VBUSCTRL |
18 |
ADC0_5 |
19 |
GND |
20 |
ADC0_0 |
21 |
VBUS |
22 |
VIN |
P22 I2S
I2S, SPI, I2C, UART, GPIO, and clocks.
Pin |
Function |
|---|---|
1 |
CLKOUT (One) / P2 (Pro) |
2 |
CLKIN |
3 |
RESET |
4 |
GND |
5 |
I2C1_SCL |
6 |
I2C1_SDA |
7 |
SPIFI_MISO (One) / PB_1 (Pro) |
8 |
SPIFI_SCK (One) / PB_3 (Pro) |
9 |
SPIFI_MOSI (One) / PA_4 (Pro) |
10 |
GND |
11 |
VCC (One) / 3V3AUX (Pro) |
12 |
I2S0_RX_SCK (One) / PA_3 (Pro) |
13 |
I2S0_RX_SDA (One) / I2S0_TX_SDA (Pro) |
14 |
I2S0_RX_MCLK (One) / PB_0 (Pro) |
15 |
I2S0_RX_WS |
16 |
I2S0_TX_SCK |
17 |
I2S0_TX_MCLK |
18 |
GND |
19 |
U0_RXD |
20 |
U0_TXD |
21 |
P2_9 |
22 |
P2_13 |
23 |
P2_8 |
24 |
SDA |
25 |
CLK6 (One) / AUX_CLK2 (Pro) |
26 |
SCL |
P28 SD
SDIO, GPIO, clocks, and CPLD.
Pin |
Function |
|---|---|
1 |
VCC (One) / 3V3AUX (Pro) |
2 |
GND |
3 |
SD_CD |
4 |
SD_DAT3 |
5 |
SD_DAT2 |
6 |
SD_DAT1 |
7 |
SD_DAT0 |
8 |
SD_VOLT0 |
9 |
SD_CMD |
10 |
SD_POW |
11 |
SD_CLK |
12 |
GND |
13 |
GCK2 (One) / P5_6 (Pro) |
14 |
GCK1 (One) / P5_7 (Pro) |
15 |
Trigger out: B1AUX14 (One) / TRIGGER.OUT (Pro) |
16 |
Trigger in: B1AUX13 (One) / TRIGGER.IN (Pro) |
17 |
CPLD_TCK |
18 |
BANK2F3M2 (One) / PE_0 (Pro) |
19 |
CPLD_TDI (One) / I2S0_RX_SDA (Pro) |
20 |
BANK2F3M6 (One) / P9_1 (Pro) |
21 |
BANK2F3M12 (One) / P5_3 (Pro) |
22 |
BANK2F3M4 (One) / P1_7 (Pro) |
P9 Baseband (HackRF One)
A direct analog interface to the high speed dual ADC and dual DAC.
Pin |
Function |
|---|---|
1 |
GND |
2 |
GND |
3 |
GND |
4 |
RXBBQ- |
5 |
RXBBI- |
6 |
RXBBQ+ |
7 |
RXBBI+ |
8 |
GND |
9 |
GND |
10 |
TXBBI- |
11 |
TXBBQ+ |
12 |
TXBBI+ |
13 |
TXBBQ- |
14 |
GND |
15 |
GND |
16 |
GND |
Additional unpopulated headers and test points are available for test and development, but they may be incompatible with some enclosure or expansion options.
Refer to the schematics and component documentation for more information.