alc850 Realtek Semiconductor Corporation, alc850 Datasheet - Page 53

• Manufacturer Part Number: alc850
• Description: Eight Channel Ac?97 2.3 Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

10.8. Power-Off CD Function
The Power-Off CD function describes a state where the system has been shut down (digital power is off)
When a +5V analog power is supplied the ALC850 will turn on the CD-IN op-amp and output amplifier.
It is possible to design a system that can bypass op-amp circuitry and pass CD output directly to the
speaker.
The figure below indicates the system application circuitry that supports the Power-Off CD function. The
operating mode is determined by +3.3VCC and +5VA.
Eight Channel AC’97 2.3 Audio Codec
+3.3VCC
Yes (1)
Yes (1)
No (0)
No (0)
No (0)
Table 63. Power-Off CD Function Circuitry
Yes (1)
Yes (1)
No (0)
No (0)
+5VA
-
+5Vstandby Operation Mode
Yes (1)
No (0)
No (0)
45
-
-
Shut Down
Power-Off CD
Power-Off CD
Digital on, Analog off
Normal
Track ID: JATR-1076-21 Rev. 1.4
Datasheet
ALC850