Rctm, Rcrm, Dai data register 0 (daidr0) – Cirrus Logic EP73xx User Manual
Page 138: Dai data register 0 (daidr0) -14
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EP7309/11/12 User’s Manual - DS508UM4
Copyright Cirrus Logic, Inc. 2003
DAI/CODEC/SSI2
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RCTM:
The Left Channel Sample Receive FIFO interrupt mask (LCRM) bit is used to mask or
enable the Left Channel Receive FIFO service request interrupt. When LCRM = 0, the
interrupt is masked and the state of the left channel sample receive FIFO service
request (LCRS) bit within the DAI status register is ignored by the interrupt
controller. When LCRM = 1, the interrupt is enabled and whenever LCRS is set (one)
an interrupt request is made to the interrupt controller. Note that programming
LCRM = 0 does not affect the current state of LCRS or the Left Channel Receive FIFO
logic’s ability to set and clear LCRS, it only blocks the generation of the interrupt
request.
RCRM:
The Right Channel Receive FIFO interrupt mask (RCRM) bit is used to mask or
enable the Right Channel Receive FIFO service request interrupt. When RCRM = 0,
the interrupt is masked and the state of the Right Channel Receive FIFO service
request (RCRS) bit within the DAI status register is ignored by the interrupt
controller. When RCRM = 1, the interrupt is enabled, and whenever RCRS is set (one),
an interrupt request is made to the interrupt controller. Note that programming
RCRM = 0 does not affect the current state of RCRS or the Right Channel Receive
FIFO logic’s ability to set and clear RCRS, for it only blocks the generation of the
interrupt request.
DAI Data Register 0 (DAIDR0)
Address:
0x8000.2040, Read / Write
Bit Descriptions:
[0:15]:
Bottom Right Receive and Top Right Transmit FIFO. Data is filed
and extracted from the Right 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 by the next value as all information with the FIFO is then
shifted down one location.
31
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29
28
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25
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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 Right Channel Receive FIFO / Top Right Channel Transmit FIFO