92hd75b Integrated Device Technology, 92hd75b Datasheet - Page 17

• Manufacturer Part Number: 92hd75b
• Description: Four Channel Hd Audio Codec
• Manufacturer: Integrated Device Technology

4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
92HD75B
4-CHANNEL HD AUDIO CODECS OPTIMIZED FOR LOW POWER
BITCLK
SDI
ADC0.CnvrtID.Channel = 0
ADC1.CnvrtID.Channel = 2
ADC0.CnvrtID.Channel = 2
ADC1.CnvrtID.Channel = 0
1.4.11.
0
The following figure describes the bus waveform for a 24-bit, 48KHz capture stream with ID set to 1.
EAPD
The EAPD pin (pin 47) also supports SPDIF and GPIO functions. The pin defaults to EAPD after
power on reset and will remain in EAPD mode until either GPIO is enabled for pin 47 or the port I/O
is enabled to support SPDIF. The EAPD value is reflected on the EAPD pin; a 1 causes the external
amplifier to power up, and a 0 causes it to power down. When the EAPD value = 1, the EAPD pin
must be placed in a state appropriate to the current power state of the associated Pin Widget even
though the EAPD value may remain 1. The default state of this pin is 0 (driving low) and a Pull-down
prevents the line from floating high when the part is in reset.
ADC1 CnvtrID
ADC0 CnvtrID
STREAM ID
0
0
Stream ID
Stream ID
1
STREAM TAG
0
Table 5: Example channel mapping
Figure 5. Multi-channel timing diagram
Length
Length
0
Data
Data
Figure 4. Multi-channel capture
DATA LENGTH
1
(NID = 0x08)
[3:0]
(NID = 0x07)
[3:0]
1
Left Channel
Left Channel
ADC0
ADC1
0
0
17
ADC0
L23
Right Channel
Right Channel
LEFT
ADC0
ADC1
Ch = 2
Ch=0
ADC0
L0
ADC0
ADC0
R23
RIGHT
Left Channel
Left Channel
ADC1
ADC0
DATA BLOCK
92HD75B
ADC0
R0
ADC1
L23
LEFT
Right Channel
Right Channel
ADC1
ADC0
ADC1
L0
ADC1
ADC1
R23
RIGHT
PC AUDIO
ADC1
R0
V 1.0 01-09