Bus Pirate I/O Pin Descriptions/es
From DP
This table displays the Bus Pirate pinout in various modes. The Bus Pirate I/O pins try to be consistent across all libraries, the same pins are used for similar functions. Unused pins are usually in a safe high-impedance state.
Modes not shown in the above diagram are similar to other libraries: MIDI=UART; raw2wire=HD44780=PC keyboard=I2C; raw3wire=SPI. All bus pins output at 3.3volts, but tolerate up to 5volts (5.5volts maximum).
| Pin | Description |
|---|---|
| Master-out slave-in (MOSI) | Primary data pin, it's used for bi-directional data transfer in protocols like I2C and 1-Wire, and as data-out from the Bus Pirate in uni-directional protocols like SPI and asynchronous serial (UART). In bus sniffer modes each pin becomes an input for the same signal usually assigned to that pin. |
| Clock | Always a clock-out signal from the Bus Pirate, except in the PC keyboard library where the keyboard provides a clock signal to the Bus Pirate. |
| Master-in slave-out (MISO) | Used with protocols that have a dedicated data-input, such as SPI and UART. |
| Chip select (CS) | An output used to activate the serial interface in SPI-like protocols. Use the auxiliary pin config menu (c) to get manual control of the CS pin through the auxiliary pin commands (a, A, @). |
| Auxiliary(AUX) | Used as an output or input from the Bus Pirate terminal interface with the A, a, and @ commands. It's useful for protocols that require an additional signal, such as a reset. |
In bus sniffer modes each pin becomes an input for the same signal usually assigned to that pin.
Pinout
| Pin name | Description (Bus Pirate is the master) |
|---|---|
| MOSI | Master data out, slave in (SPI, JTAG), Serial data (1-Wire, I2C, KB), TX* (UART) |
| CLK | Señal de reloj (I2C, SPI, JTAG, KB) |
| MISO | Entrada de datos maestra, salida esclava (SPI, JTAG) RX (UART) |
| CS* | Chip select (SPI), TMS (JTAG) |
| AUX | Auxiliary IO, frequency probe, pulse-width modulator |
| ADC | Voltage measurement probe (max 6volts) |
| Vpu | Voltage input for on-board pull-up resistors (0-5volts). |
| +3.3v | Fuente de alimentación de +3.3volt |
| +5.0v | Fuente de alimentación de +5volt |
| GND | Tierra, connect to ground of test circuit |
Notes: * TX moved from CS to MOSI in firmware v0g.