WM9705SEFT/V Wolfson Microelectronics, WM9705SEFT/V Datasheet - Page 37

• Manufacturer Part Number: WM9705SEFT/V
• Description: Audio CODECs Stereo AC'97 Codec T/P Interface
• Manufacturer: Wolfson Microelectronics

Specifications of WM9705SEFT/V

• Number Of Adc Inputs: 1
• Number Of Dac Outputs: 1
• Conversion Rate: 48 KSPS
• Interface Type: AC97
• Resolution: 12 bit
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Minimum Operating Temperature: - 25 C
• Number Of Channels: 2 ADC/2 DAC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM9705
w
CONTROL
BIT
AMUTE
HSCP
MPUEN
MHPZ
PSEL
HSDT
HSEN
HPND
AMEN
I
ADCNDAC
ADCO
HPF
HSCMP
ASS1
ASS0
Table 21 Vendor Specific Control Register 5Ch
AMUTE indicates automute state has been detected. This is a read-only bit. 1 = automute
detected.
HSCP is a read only bit, indicating headset detected. It is the output from the headset autodetect
comparator. 0 = headset detected.
MPUEN enables a 5mA (typ) pull up current on the MIC1 input pin, which when a headset
microphone of high impedance is plugged in, causes the MIC1 pin to pull up to above Vmid, and
be detected. 1 = enable.
MHPZ tristates the MONO headphone driver output buffer. 1 = tristate.
PSEL enables the switch from PHONE input to MONO output; see block diagram. 1 = enable.
HSEN enables headset auto-detect function. HSCMP enables the headset detect comparator. 1 =
enable.
HSDT overrides the headset auto-detect comparator, forcing the left headphone output to tristate
and the HPLOUTL pin to be used as a headset microphone input path to the mic1 preamplifier
input. 1 = autodetect comparator override.
HPND enables the switch which outputs only the analog mixer output to the HPHONE outputs,
without the DAC signal being summed in. See block diagram. 1 = enable.
AMEN enables the DAC automute function, which detects zero data on both dac channels and
auto-mutes the outputs under this condition. 1 = enable.
Bit I
SPEN/I
enable.
ADCNDAC selects input to the ADC from before the point where the DAC signal is summed in. 1
= select.
Bit ADCO is used to select data from the internal ADCs to be output as SPDIF or I
these pins rather than the data from the selected AC link slot. 1 = select.
HPF turns off the digital high pass filter in the ADC output when set to ‘1’.
ASS1, ASS0 are ADC slot mapping control bits. See table below. Default is slots 3 and 4.
2
S
2
S enables I
2
S pin (pin 44). BITCLK is used to clock out the data. Only 48ks/s data is supported. 1 =
FUNCTION
Indicates automute has been detected in the audio DAC (all ‘0’ data) – read only
Headset detect comparator output – read only
Mic pull up enable
Mono headphone tristate enable
PHONE to MONO path switch enable
Overrides Headset detect comparator, forcing left headphone amp to tristate
Headset auto-detect enable
Headphone with no DAC enable
Automute enable bit
I
ADC no DAC path enable
ADC to SPDIF and/or I
ADC high pass filter disable;
Headset comparator enable bit
ADC slot map control
ADC slot map control
2
2
S data output enable
S output, sending an LRCLK to the MASK/LRC pin (pin 43) and I
2
S output
PD Rev 4.5 July 2008
2
Production Data
S data to the
2
S data on
37