STAC9752 Datasheet, PDF (71/95 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
8.4.4.
Function Select (66h Page 01h)
Register 24h must be set to Page 01h to access this register.
Default: 0000h
D15
D14
D13
D12
D11
D10
D9
D8
RESERVED
D7
D6
D5
D4
D3
D2
D1
D0
RESERVED
FC3
FC2
FC1
FC0
T/R
Bit(s) Reset Value Name
Description
15-5
Reserved Reserved
Function Code bits:
00h - Line Out (Master Out)
01h - Head Phone Out (AUX Out)
Setting the T/R bit to 0 = Left,1 = Right
02h - DAC 3 (C/LFE) - Not Supported
03h - SPDIF out
04h - Phone In
05h - Mic1 (Microphone select = 0)
06h - Mic2 (Microphone select = 1)
07h - Line In
08h - CD In
09h - Video In
4-1
00h
FC3:FC0 0Ah - Aux In
0Bh - Mono Out
0C-0Fh - Reserved
For supported Jack and Microphone Sense Functions, see Table21: page71.
The Function Code Bits are used to read Register 68h (Page 01h) and Register
6Ah (Page 01h).
Mono I/O should report relevant sense and function information on Tip, and report
Not-Supported on Ring.
0
0
Setting the function code to unsupported values will return a 0 when accessing the
Information Valid Bit in Page 01, Register 68h, bit 5.
Tip or Ring Selection Bit.This bit sets which jack conductor the sense value is
measured from. Software will program the corresponding the Ring/Tip selector bit
T/R together with the I/O number in bits FC[3:0].
0 - Tip (Left)
1 - Ring (Right)
Note: This register does not reset on RESET#.
Table 21. Supported Jack and Microphone Sense Functions
Function Code
00h
01h
05h
06h
I/O
Line_Out
Headphone_Out
Mic1
Mic2
Sense Capability
Jack Sense
Jack Sense
Microphone Sense
Microphone Sense
IDT™
71
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
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