McASP Registers
Table 22-38. Transmit Bit Stream Format Register (XFMT) Field Descriptions (continued)
Bit
Field
Value
Description
7-4
XSSZ
0-Fh
Transmit slot size.
0-2h
Reserved.
3h
Slot size is 8 bits.
4h
Reserved.
5h
Slot size is 12 bits.
6h
Reserved.
7h
Slot size is 16 bits.
8h
Reserved.
9h
Slot size is 20 bits.
Ah
Reserved.
Bh
Slot size is 24 bits.
Ch
Reserved.
Dh
Slot size is 28 bits.
Eh
Reserved.
Fh
Slot size is 32 bits.
3
XBUSEL
Selects whether writes to serializer buffer XRBUF[n] originate from the configuration bus (CFG) or the
data (DAT) port.
0
Writes to XRBUF[n] originate from the data port. Writes to XRBUF[n] from the configuration bus are
ignored with no effect to the McASP.
1
Writes to XRBUF[n] originate from the configuration bus. Writes to XRBUF[n] from the data port are
ignored with no effect to the McASP.
2-0
XROT
0-7h
Right-rotation value for transmit rotate right format unit.
0
Rotate right by 0 (no rotation).
1h
Rotate right by 4 bit positions.
2h
Rotate right by 8 bit positions.
3h
Rotate right by 12 bit positions.
4h
Rotate right by 16 bit positions.
5h
Rotate right by 20 bit positions.
6h
Rotate right by 24 bit positions.
7h
Rotate right by 28 bit positions.
3864
Multichannel Audio Serial Port (McASP)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated