13.2.2.1 Port List
The following table lists the SPI signals.
| Name | Type | Polarity | Description |
|---|---|---|---|
| SPI_X_DI | Input | High | Serial data input |
| SPI_X_DO | Output | High | Serial data input |
| SPI_X_CLK | Input/Output | High | Serial clock. It is a serial programmable bit rate clock out signal. Input when SPI is in the slave mode. Output when SPI is in the master mode. |
| SPI_X_SS[0] | Input/Output | Low, except for TI mode |
Slave select. Input when SPI is in the slave mode. Output when SPI is in the master mode. The slave select output polarity is active Low. In TI mode the slave select output is inverted to become active High. |
| SPI_X_SS[7:1] | Output | Low, except for TI mode |
Extra slave select signal. Valid only in the
Master mode. The slave select output polarity is active-low. In TI mode, the slave select output is inverted to become active-high. |
| SPI_X_INT | Output | High | SPI interrupt |
| SPI_X_DOE_N | Output | High | Output enable |
| SPI_X_TXRFM | Output | High | SPI ready to transmit. Used only by MSS PDMA engine |
| SPI_X_RXAVAIL | Output | High | SPI received data. Used only by MSS PDMA engine. |