Coding of NVB (Number of Valid Bits)
Length: 1 byte
The upper 4 bits are called “Byte count” and specify the integer part of the number of all valid data bits transmitted by the PCD (including SEL and NVB) divided by 8. Consequently, the minimum value of “Byte count” is 2 and the maximum value is 7.
What does the bold text mean?
- Number of all the bits in a valid-data transmission?
- Number of all the valid-bits in a data transmission?
I mean how can I understand what is the reference of valid (data or bits)?