STAC9753XXTAEB2X Datasheet STAC9753XXTAEB2X, STAC9753XXTAEB2XR | P73-P75

STAC9752/9753

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

IDT™

73 STAC9752/9753

REV 3.3 1206

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

8.4.6. Digital Audio Control (6Ah, Page 00h)

To access Register 6Ah, Page 00h must be selected in Register 24h.

4 1 IV

Information Valid Bit: Indicates whether a sensing method is provided by the

CODEC and if information field is valid. This field is updated by the CODEC.

0 - After CODEC RESET# de-assertion, it indicates the CODEC does NOT

provides sensing logic and this bit will be Read Only. After a sense cycle is

completed, indicates that no information is provided on the sensing method.

1 - After CODEC RESET# de-assertion, it indicates the CODEC provides

sensing logic for this I/O and this bit is Read/Write. After clearing this bit by

writing 1, when a sense cycle is completed the assertion of this bit indicates that

there is valid information in the remaining descriptor bits. Writing 0 to this bit has

no effect.

BIOS should NOT write this bit, as it is reset on RESET#.

3-1 0 RESERVED Bits not used, should read back 0

0 NA FIP

Function Information Present

This bit set to a 1 indicates that the G[4:0], INV, DL[4:0] (Register 68h, Page 01h)

and ST[2:0] (register 6Ah, Page 01h) are supported and R/W capable.

This bit is Read Only.

Table 22. Reg 68h Default Values

Reg 66h Function Code Reg 68h Default Value

00h Line Out 0010h

01h Headphone Out 0010h

05h Mic1 0010h

06h Mic2 0010h

All other Function Codes 0000h

For RESET#: Reg 68h default value is 0000h.

Table 23. Gain or Attenuation Examples

G[4:0] Gain or Attenuation (dB relative to level-out)

00000 0 dBV

00001 +1.5 dBV

01111 +24 dBV

10001 -1.5 dBV

11111 -24 dBV

Table 24. Register 68h/Page 01h Bit Overview

Bit Bit R/W Overview

D15:D5 Read/Write and only reset on POR (Power on Reset) and not by RESET#.

D4 Read/Write and should NOT be set by the BIOS

D3:1 Reserved

D0 Read Only.

Bit(s) Reset Value Name Description

STAC9752/9753

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

IDT™

74 STAC9752/9753

REV 3.3 1206

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

Default: 0000h

8.4.7. Sense Details (6Ah Page 01h)

Default: NA

D15 D14 D13 D12 D11 D10 D9 D8

RESERVED

D7 D6 D5 D4 D3 D2 D1 D0

RESERVED SPOR DO1 RSVD

Bit(s) Reset Value Name Description

15:3 0 RESERVED Bits not used, should read back 0

2 0 SPOR

Over-ride Register 2Ah, D12 write-lock when SPDIF_EN = 1.

All bits except SPDIF sample-rate are affected (D13-D12). Allows for sub-code

changing on-the-fly.

1 0 DO1

SPDIF Digital Output Source Selection:

DO1 = 0; PCM data from the AC-Link to SPDIF

DO1 = 1; ADC record data to SPDIF

0 0 RESERVED Bits not used, should read back 0

D15 D14 D13 D12 D11 D10 D9 D8

ST2 ST1 ST0 S4 S3 S2 S1 S0

D7 D6 D5 D4 D3 D2 D1 D0

OR1 OR0 SR5 SR4 SR3 SR2 SR1 SR1

Bit(s) Reset Value Name Description

15-13 ST2:ST0

Connector/Jack location bits

This field describes the location of the jack in the system.

0h - Rear I/O Panel

1h - Front Panel

2h - Motherboard

3h - Dock/External

4h:6h - Reserved

7h - No Connection/unused I/O

These bits are Read/Write.

12-8 S4:S0

Sensed bits meaning relates to the I/O being sense as output or inputs.

Sensed bits (outputs): See Table 25: page75.

This field allows for the reporting of the type of output peripheral/device plugged in

the jack. Values specified below should be interrogated in conjunction with the

SR[5:0] and OR[1:0] bits for accurate reporting.

Sensed bits (inputs): See Table 26: page75.

This field allows for the reporting of the type of input peripheral/device plugged in

the jack. Values specified below should be interrogated in conjunction with the

SR[5:0] and OR[1:0] bits for accurate reporting.

This field is Read Only.

STAC9752/9753

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

IDT™

75 STAC9752/9753

REV 3.3 1206

TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

7-6 OR1:0

Order Bits. These bits indicate the order the sense result bits SR[5:0] are using.

00 - 10

(i.e., Ohms)

01 - 10

(i.e., 10 Ohms)

10 - 10

(i.e., 100 Ohms)

11 - 10

(i.e., 1K Ohms)

5-0 SR5:SR0

Sense Result bits

These bits are used to report a vendor specific fingerprint or value. (Resistance,

impedance, reactance, etc.). This field is Read Only.

Table 25. Sensed Bits (Outputs)

Reported Value Output Peripheral/Device

0h Data not valid. Indicates that the reported value(s) is (are) invalid.

1h No connection. Indicates that there are no connected devices.

2h Fingerprint. Indicates a specific fingerprint value for devices that are not specified or unknown.

3h Speakers (8 ohms)

4h Speakers (4 ohms)

5h Powered Speakers

6h Stereo Headphone

7h Reserved

8h Reserved

9h Headset (mono speaker left channel and microphone.)

Other. Allows a vendor to report sensing other type of devices/peripherals. SR[5:0] together with

OR[1:0] provide information regarding the type of device sensed.

Bh-Eh Reserved

Fh Unknown (use fingerprint)

Table 26. Sensed Bits (Inputs)

Reported Value Input Peripheral/Device

0h Data not valid. Indicates that the reported value(s) is (are) invalid.

1h No connection. Indicates that there are no connected devices.

2h Fingerprint. Indicates a specific fingerprint value for devices that are not specified.

3h Microphone (mono)

4h Reserved

5h Stereo Line In (CE device attached)

6h Reserved

7h Reserved

8h Reserved

9h Headset (mono speaker left channel and microphone.)

Other. Allows a vendor to report sensing other type of devices/peripherals. SR[5:0] together with

OR[1:0] provide information regarding the type of device sensed.

Bh-Eh Reserved

Fh Unknown (use fingerprint)

Bit(s) Reset Value Name Description

STAC9753XXTAEB2X

Mfr. #:

Buy STAC9753XXTAEB2X

Manufacturer:

Tempo Semiconductor

Description:

Interface - CODECs AC97 2.3 2-CH AUDIO CODEC

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New from this manufacturer.

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STAC9753XXTAEB2X

STAC9753XXTAEB2X

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