SPRUJ52C june 2022 – july 2023 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
A data buffer is a byte aligned contiguous block of memory used to store packet payload data. Each buffer is described in an entry in either a packet descriptor or in a buffer descriptor. A data buffer may hold any portion of a packet and may be linked together (via descriptors) with other buffers to form packets. Data buffers may be allocated anywhere within the 64-bit memory space.
The Buffer Length field of the packet/buffer descriptor indicates the number of valid data bytes in the buffer. There may be from 1 to 4M-1 valid data bytes in each buffer.