Cirrus-logic EP73xx Bedienungsanleitung PDF herunterladen (Seite 139)

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 and is

placedatthetopofthetransmitFIFO.Thedataisthenshifted

down to the 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 serial shifter, then shifts the

data out onto the

SDOUT pinwiththeappropriateclocks.

DAI Data Register 1 (DAIDR1)

Address: 0x8000.2080, Read / Write

Bit Descriptions:

[0:15]: Bottom Left Receive and Top Left Transmit FIFO. Data is filed and

extracted from the Left Channel FIFOs using this register.

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

placed the top of the receive FIFO and shifted down for each new

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 the FIFO. The bottom value is the

replaced bythe next valueas all information with the FIFO is then

shifted down one location.

Data Write: Data is received by the DAI from the system software and is

placedatthetopofthetransmitFIFO.Thedataisthenshifted

down to the 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 serial shifter, then shifts the

data out onto 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

1 2 ... 134 135 136 137 138 139 140 141 142 143 144 ... 157 158

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Cirrus-logic EP73xx Bedienungsanleitung Seite 139