alc658 Realtek Semiconductor Corporation, alc658 Datasheet - Page 27

• Manufacturer Part Number: alc658
• Description: Six-channel Ac?97 2.3 Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

The ‘V’ bit in the sub-frame is determined by Validity control (MX3A.15) and VCFG (MX2A.15).
6.2. Vendor Defined Registers (Page ID-00h)
These registers are available to Realtek and Realtek customers for specialized functions.
6.2.1.
Default: 0000h
The data in MX60 are captured from the channel status [15:0] of the S/PDIF-IN signal.
Six-Channel AC’97 2.3 Audio Codec
14:8
Bit
7:6
5:3
15
2
1
0
Type
MX60 S/PDIF Input Channel Status [15:0]
R
R
R
R
R
R
R
Validity
Function
LEVEL (Generation Level)
CC[6:0] (Category Code)
Mode[1:0]
PRE[2:0] (Pre-Emphasis)
COPY (Copyright)
0: Asserted
/AUDIO (Non-Audio Data type)
0: PCM data
PRO (Professional or Consumer Format)
0: Consumer Format
The ALC658 only supports consumer channel status format. This bit is always 0
0
0
1
1
VCFG
Table 34. MX60 S/PDIF Input Channel Status [15:0]
0
1
0
1
Table 33. Validity Control S/PDIF Output
1: Not Asserted
1: AC3 or other digital non-audio data
Operation
If S/PDIF FIFO is under-run, the ‘V’ bit in the sub-frame is set
to indicate that the S/PDIF data is invalid.
If S/PDIF FIFO is under-run, the ‘V’ bit in the sub-frame is
always 0, and pads the data with ‘0’s.
The ‘V’ bit is always 1, and data bits (bit 8 ~ bit 27) should be
forced to 0.
The ‘V’ bit in the sub-frame is always ‘0’, and the S/PDIF
output data should be forced to zero.
1: Professional Format
23
Datasheet
ALC658
Rev. 1.3