Espressif ESP32 Technical Reference Manual page 160

7 SPI Controller (SPI)
31 30 29
0 0 0 0 0 0 0
RX_FIFO_EMPTY The SPI DMA RX FIFO is empty. (RO)
RX_FIFO_FULL The SPI DMA RX FIFO is full. (RO)
RX_DES_ADDRESS The LSB of the SPI DMA inlink descriptor address. (RO)
Espressif Systems
Register 7.44. SPI_DMA_TSTATUS_REG (0x14C)
20 19
0 0 0 0 0 0 0 0
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0 0 0 0 0 0 0 0
160
0 0 0 0 0 0 0 0
ESP32 TRM (Version 5.2)
0
0
Reset