IDTSTAC9758XXTAEB1XR IDT, Integrated Device Technology Inc, IDTSTAC9758XXTAEB1XR Datasheet - Page 71

• Manufacturer Part Number: IDTSTAC9758XXTAEB1XR
• Description: IC CODEC AC'97 6CH 2.3 48-TQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Audio Codec '97r

Specifications of IDTSTAC9758XXTAEB1XR

• Data Interface: Serial
• Resolution (bits): 20 b
• Number Of Adcs / Dacs: 2 / 3
• Sigma Delta: Yes
• Voltage - Supply, Analog: 3.14 V ~ 3.47 V; 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.14 V ~ 3.47 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.135V
• Single Supply Voltage (max): 3.465/5.25V
• Package Type: TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: STAC9758XXTAEB1XR

IDT™
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
8.2.19.1.
The lower half of this register is read-only status, a 1 indicating that each subsection is “ready”.
Ready is defined as the subsection's ability to perform in its nominal state. When this register is writ-
ten, the bit values that come in on AC-Link will have no effect on read-only bits 0-7.
When the AC-Link “CODEC Ready” indicator bit (SDATA_IN slot 0, bit 15) is a 1, it indicates that the
AC-Link and AC'97 control and status registers are in a fully operational state. The AC'97 controller
must further probe this Power Down Control/Status Register to determine exactly which subsec-
tions, if any are ready. When this register is written, the bit values that come in on AC-Link will have
no effect on read only bits 0-7.
8.2.19.2.
The STAC9758/9759 is capable of operating at reduced power when no activity is required. The
state of power down is controlled by the Powerdown Register (26h). See the section “Low Power
Modes” for more information.
8.2.19.3.
The EAPD bit 15 of the Powerdown Control/Status Register (Index 26h) directly controls the output
of the EAPD output, pin 47, and produces a logical 1 when this bit is set to logic high. This function is
used to control an external audio amplifier power down. EAPD = 0 places approximately 0V on the
output pin, enabling an external audio amplifier. EAPD = 1 places approximately DVdd on the output
pin, disabling the external audio amplifier. Audio amplifiers that operate with reverse polarity will
require an external inverter to maintain software driver compatibility.
EAPD can also act as a GPIO or SPDIF_IN. See Section 8.4.1: page81. The GPIO controls in
Section8.4: page81 have no effect on EAPD.
Ready Status
Powerdown Controls
External Amplifier Power Down Control Output
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STAC9758/9759
PC AUDIO
V 1.2 1206