McASP Registers
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22.4.1.47 Read FIFO Status Register (RFIFOSTS)
The Read FIFO status register (RFIFOSTS) is shown in Figure 22-85 and described in Table 22-52.
Figure 22-85. Read FIFO Status Register (RFIFOSTS)
31 16
Reserved
R-0
15 8 7 0
Reserved RLVL
R-0 R-0
LEGEND: R = Read only; -n = value after reset
Table 22-52. Read FIFO Status Register (RFIFOSTS) Field Descriptions
Bit Field Value Description
31-8 Reserved 0 Reserved
7-0 RLVL 0-FFh Read level (read-only). Number of 32-bit words currently in the Read FIFO.
0 0 words currently in Read FIFO.
1h 1 word currently in Read FIFO.
2h 2 words currently in Read FIFO.
3h-40h 3 to 64 words currently in Read FIFO.
41h-FFh Reserved
22.4.2 McASP Data Port Registers
Table 22-53. McASP Registers Accessed Through Data Port
Hex Address Register Name Register Description
Read Accesses RBUF Receive buffer data port address. Cycles through receive serializers, skipping over
transmit serializers and inactive serializers. Starts at the lowest serializer at the beginning
of each time slot. DAT BUS only if XBUSEL = 0.
Write Accesses XBUF Transmit buffer data port address. Cycles through transmit serializers, skipping over
receive and inactive serializers. Starts at the lowest serializer at the beginning of each
time slot. DAT BUS only if RBUSEL = 0.
3880
Multichannel Audio Serial Port (McASP) SPRUH73H–October 2011–Revised April 2013
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