Word Length; Bit Order; Data Type - Analog Devices ADSP-BF506F Hardware Reference Manual

Functional Description

Word Length

Each SPORT channel (transmit and receive) independently handles word
lengths of 3 to 32 bits. The data is right-justified in the SPORT data reg-
isters if it is fewer than 32 bits long, residing in the LSB positions. The
value of the serial word length (SLEN) field in the SPORT_TCR2 and
SPORT_RCR2 registers of each SPORT determines the word length
according to this formula:
Serial Word Length =

The
SLEN
allowed. Continuous operation (when the last bit of the current
word is immediately followed by the first bit of the next word) is
restricted to word sizes of 4 or longer (so

Bit Order

Bit order determines whether the serial word is transmitted MSB first or
LSB first. Bit order is selected by the
and
SPORT_RCR1
words are received (or transmitted) MSB first. When
) = 1, serial words are received (or transmitted) LSB first.
TLSBIT

Data Type

The TDTYPE field of the SPORT_TCR1 register and the RDTYPE field
of the SPORT_RCR1 register specify one of four data formats for both
single and multichannel operation. See
19-28
+ 1
SLEN
value should not be set to 0 or 1; values from 2 to 31 are
registers. When
SPORT_TCR1
ADSP-BF50x Blackfin Processor Hardware Reference

3).
SLEN
and
RLSBIT TLSBIT
(or
RLSBIT
RLSBIT
Table 19-4.
bits in the
) = , serial
TLSBIT 0
(or