SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
Each multicontroller I2C implements two internal 8-bit FIFOs, the RX and TX FIFOs.
The depth of the RX and TX FIFOs can be checked by reading the I2C_BUFSTAT[15-14] FIFODEPTH bit field (0x0: 8 bytes, 0x1: 16 bytes, 0x2: 32 bytes, and 0x3: 64 bytes).