CS4299-BQZR Cirrus Logic Inc, CS4299-BQZR Datasheet - Page 46

• Manufacturer Part Number: CS4299-BQZR
• Description: IC AC97 Codec With SRC
• Manufacturer: Cirrus Logic Inc

AC-Link
RESET# - AC ’97 Chip Reset, Input, Pin 11
SYNC - AC-Link Serial Port Sync pulse, Input, Pin 10
BIT_CLK - AC-Link Serial Port Master Clock, Input/Output, Pin 6
SDATA_OUT - AC-Link Serial Data Input Stream to AC ’97, Input, Pin 5
SDATA_IN - AC-Link Serial Data Output Stream from AC ’97, Output, Pin 8
Power Supplies
DVdd1, DVdd2 - Digital Supply Voltage, Pins 1 and 9
DVss1, DVss2 - Digital Ground, Pins 4 and 7
AVdd1, AVdd2 - Analog Supply Voltage, Pins 25 and 38
AVss1, AVss2 - Analog Ground, Pins 26 and 42
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This active low signal is the asynchronous Cold Reset input to the CS4299-BQ. The CS4299-BQ must
be reset before it can enter normal operating mode.
This signal is the serial port timing signal for the AC-link. Its period is the reciprocal of the maximum
sample rate, 48 kHz. The signal is generated by the controller, synchronous to BIT_CLK. SYNC is an
asynchronous input when the CS4299-BQ is configured as a primary audio codec and is in a PR4
powerdown state. A series terminating resistor of 47 Ω should be connected on the signal near the
SYNC source.
This input/output signal controls the master clock timing for the AC-link. In primary mode, this signal is a
12.288 MHz output clock derived from a 24.576 MHz crystal on the XTL_IN input clock. When the
CS4299-BQ is in secondary mode, this signal is an input which controls the AC-link serial interface and
generates all internal clocking including the AC-link serial interface timing and the analog sampling
clocks. A series terminating resistor of 47 Ω should be connected on this signal close to the CS4299-BQ
in primary mode or close to the BIT_CLK source in secondary mode.
This input signal receives the control information and digital audio output streams. The data is clocked
into the CS4299-BQ on the falling edge of BIT_CLK. A series terminating resistor of 47 Ω should be
connected on this signal near the controller.
This output signal transmits the status information and digital audio input streams from the ADCs. The
data is clocked out of the CS4299-BQ on the rising edge of BIT_CLK. A series terminating resistor of
47 Ω should be connected on this signal as close to the CS4299-BQ as possible.
Digital supply voltage for the AC-link section of the CS4299-BQ. These pins can be tied to +5 V digital
or to +3.3 V digital. The CS4299-BQ and controller AC-link should share a common digital supply
Digital ground connection for the AC-link section of the CS4299-BQ. These pins should be isolated from
analog ground currents.
Analog supply voltage for the analog and mixed signal sections of the CS4299-BQ. These pins must be
tied to the analog +5 V power supply. It is strongly recommended that +5 V be generated from a
voltage regulator to ensure proper supply currents and noise immunity from the rest of the system.
Ground connection for the analog, mixed signal, and substrate sections of the CS4299-BQ. These pins
should be isolated from digital ground currents.
CS4299-BQ
CS4299-BQ
DS319-BQPP2