STA308 STMicroelectronics, STA308 Datasheet - Page 7

• Manufacturer Part Number: STA308
• Description: IC AUDIO PROCESSOR DGTL 64-TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA308

• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -

STA308
1.0 PIN DESCRIPRTION
1.1 MVO: Master Volume Override
This pin enables the user to bypass the Volume Control on all channels. When MVO is pulled High, the Master
Volume Register is set to 00h, which corresponds to its Full Scale setting. The Master Volume Register Setting
offsets the individual Channel Volume Settings, which default to 0dB.
1.2 SDI_12 through 78: Serial Data In
Audio information enters the device here. Six format choices are available including I2S, left- or right-justified,
LSB or MSB first, with word widths of 16, 18, 20 and 24 bits.
1.3 RESET
Driving this pin (low) turns off the outputs and returns all settings to their defaults.
1.4 I2C
The SA, SDA and SCL pins operate per the Philips I2C specification. See Section 2.
1.5 PLL: Phase Locked Loop
The phase locked loop section provides the System Timing Signals and CKOUT.
1.6 CKOUT: Clock Out
System synchronization and master clocks are provided by the CKOUT.
1.7 OUT1 through OUT8: PWM Outputs
The PWM outputs provide the input signal for the power devices.
1.8 EAPD: External Amplifier Power-Down
This signal can be used to control the power-down of DDX power devices.
1.9 SDO_12 through 78: Serial Data Out
Audio information exits the device here. Six different format choices are available including I2S, left- or right-
justified, LSB or MSB first, with word widths of 16, 18, 20 and 24 bits.
1.10 PWDN: Device Power-Down
This puts the STA308 into a low-power state via appropriate power-down sequence. Pulling PWDN low begins
power-down sequence, and EAPD goes low ~30ms later.
2.0 II2C BUS SPECIFICATION
The STA308 supports the I2C protocol. This protocol defines any device that sends data on to the bus as a
transmitter and any device that reads the data as a receiver. The device that controls the data transfer is known
as the master and the other as the slave. The master always starts the transfer and provides the serial clock
for synchronization. The STA308 is always a slave device in all of its communications.
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