User Manual

EP7309/11/12 User’s Manual - DS508UM4 16-15

DAI/CODEC/SSI2

1616

Data Write: Data is received by the DAI from the system software an d is

placedatthetopofthetransmitFIFO.Thedataisthenshifted

down to th e lowest location in the FIFO. The transmit logic from

the DAI removes data from the lowest location, load the data into

the correct position within the 64-bit seri al shifter, then shifts the

data out on to the

SDOUT pinwiththeappropriateclocks.

DAI Data Register 1 (DAIDR1)

Address: 0x8000.2080, Read / Write

Bit Descriptions:

[0:15]: Bottom Lef t R eceive and Top Left Transmit FIFO. Data i s filed and

extracted from the Left Channel FIFOs using this register.

Data Read: Data received by the DAI m achine from external hardware and is

placed th e top of the receive FIFO and shifted down for each n ew

entry into the FIFO until it reaches the last empty location within

the FIFO. Data is removed from the FIFO by a system software

read from the bottom of th e FIFO. The bottom value is the

replaced by the n ext value as all information with th e FIFO is then

shifted down one location.

Data Write: Data is received by the DAI from the system software an d is

placedatthetopofthetransmitFIFO.Thedataisthenshifted

down to th e lowest location in the FIFO. The transmit logic from

the DAI removes data from the lowest location, load the data into

the correct position within the 64-bit seri al shifter, then shifts the

data out on to the

SDOUT pinwiththeappropriateclocks.

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

RSVD

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Bottom Left Channel Receive FIFO / Top Left Channel Transmit FIFO