VT1616 데이터 시트보기 (PDF) - Unspecified
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VT1616 Datasheet PDF : 40 Pages
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VT1616 6-Channel AC97 Codec with S/PDIF
Extended Audio ID Register (Index 28h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
ID1 ID0 –
–
–
– AMAP LDAC SDAC CDAC –
–
– SPDIF – VRA 01Exh
The Extended Audio ID is a read only register that indicates the capabilities of the VT1616.
ID[1:0]
(See Table below)
One primary and an additional codec may be supported as an option. Since the VT1616 codec has
all six outputs implemented, the ID pin setting affects only the BIT_CLK direction and the register
decoding. BIT_CLK output the power-up default. Setting the codec besides default changes
BIT_CLK to input mode. As indicated by D9, AMAP=0, there is no need to change slot mappings.
Note:
Table 5. Multiple Codec Mode Status Bits
ID1
ID0
Codec Mode
0
0
Primary Codec (default)
0
1
Secondary Codec
1
0
Invalid
1
1
Invalid
The state of the ID pins is reported in reverse polarity on register 28h, bits D15 and D14. If you use this table to configure the codec via
pins 45 and 46, use the inverse values. Please, refer to Figure 4 on page 27. BIT_CLK is an output for the primary codec and an input
pin for the controller and secondary codecs. ID[1:0] pins with internal pull-up resistors defaults codec as primary codec.
AMAP
Slot/DAC mapping based on Codec ID
“0” : Feature not applicable since all possible channels are available on VT1616.
xDAC
Multi-channel Output Capabilities
“1”: LDAC, SDAC, CDAC report to the querying host that the codec has all six outputs
implemented.
SPDIF
Sony/Philips Digital Audio Interface
“1” : Feature implemented in compliance to “S/PDIF Output for AC ‘97, Rev 1.0”
“0” : Indicates that SPDIF_OUT pin 48 is left floating or pulled-high. It reflects the lack of
external S/PDIF application circuitry.
VRA
Variable Sampling Rate PCM Audio
“1” : Feature implemented in compliance to AC ‘97 2.2 Appendix A
Revision 1.5, October 11, 2002
19
Data Sheet
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