SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Buffer Offset
Indicates how many unused bytes are at the start of the buffer. A value of 0000h indicates that no unused bytes are at the start of the buffer and that valid data begins on the first byte of the buffer. A value of 000Fh (decimal 15) indicates that the first 15 bytes of the buffer are to be ignored by the port and that valid buffer data starts on byte 16 of the buffer. The host sets the Buffer_Offset value (which may be zero to the buffer length minus 1). Valid only on SOP.
Buffer Length
Indicates how many valid data bytes are in the buffer. Unused or protocol specific bytes at the beginning of the buffer are not counted in the Buffer Length field. The host sets the Buffer_Length. The Buffer_Length must be greater than zero.