Datasheet

1−5
1.5 Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
NAME
GQE PW
I/O
DESCRIPTION
AGND 5 15 Analog supply return
AVDD 4 14 Analog supply input. Voltage level is 3.3 V nominal.
BCLK 23 3 I/O I
2
S serial-bit clock. In audio master mode, the AIC23 generates this signal and sends it to the DSP. In
audio slave mode, the signal is generated by the DSP.
BVDD 21 1 Buffer supply input. Voltage range is from 2.7 V to 3.6 V.
CLKOUT 22 2 O Clock output. This is a buffered version of the XTI input and is available in 1X or 1/2X frequencies of XTI.
Bit 07 in the sample rate control register controls frequency selection.
CS 12 21 I Control port input latch/address select. For SPI control mode this input acts as the data latch control. For
2-wire control mode this input defines the seventh bit in the device address field. See Section 3.1 for
details.
DIN 24 4 I I
2
S format serial data input to the sigma-delta stereo DAC
DGND 20 28 Digital supply return
DOUT 27 6 O I
2
S format serial data output from the sigma-delta stereo ADC
DVDD 19 27 Digital supply input. Voltage range is 1.4 V to 3.6 V.
HPGND 32 11 Analog headphone amplifier supply return
HPVDD 29 8 Analog headphone amplifier supply input. Voltage level is 3.3 V nominal.
LHPOUT 30 9 O Left stereo mixer-channel amplified headphone output. Nominal 0-dB output level is 1 V
RMS
. Gain of –73
dB to 6 dB is provided in 1-dB steps.
LLINEIN 11 20 I Left stereo-line input channel. Nominal 0-dB input level is 1 V
RMS
. Gain of –34.5 dB to 12 dB is provided
in 1.5-dB steps.
LOUT 2 12 O Left stereo mixer-channel line output. Nominal output level is 1.0 V
RMS
.
LRCIN 26 5 I/O I
2
S DAC-word clock signal. In audio master mode, the AIC23 generates this framing signal and sends it
to the DSP. In audio slave mode, the signal is generated by the DSP.
LRCOUT 28 7 I/O I
2
S ADC-word clock signal. In audio master mode, the AIC23 generates this framing signal and sends it
to the DSP. In audio slave mode, the signal is generated by the DSP.
MICBIAS 7 17 O Buffered low-noise-voltage output suitable for electret-microphone-capsule biasing. Voltage level is 3/4
AVDD nominal.
MICIN 8 18 I Buffered amplifier input suitable for use with electret-microphone capsules. Without external resistors a
default gain of 5 is provided. See Section 2.3.1.2 for details.
MODE 13 22 I Serial-interface-mode input. See Section 3.1 for details.
NC 1, 9
17, 25
Not Used—No internal connection
RHPOUT 31 10 O Right stereo mixer-channel amplified headphone output. Nominal 0-dB output level is 1 V
RMS
. Gain of
−73 dB to 6 dB is provided in 1-dB steps.
RLINEIN 10 19 I Right stereo-line input channel. Nominal 0-dB input level is 1 V
RMS
. Gain of –34.5 dB to 12 dB is provided
in 1.5-dB steps.
ROUT 3 13 O Right stereo mixer-channel line output. Nominal output level is 1.0 V
RMS
.
SCLK 15 24 I Control-port serial-data clock. For SPI and 2-wire control modes this is the serial-clock input. See
Section 3.1 for details.
SDIN 14 23 I Control-port serial-data input. For SPI and 2-wire control modes this is the serial-data input and also is
used to select the control protocol after reset. See Section 3.1 for details.
VMID 6 16 I Midrail voltage decoupling input. 10-µF and 0.1-µF capacitors should be connected in parallel to this
terminal for noise filtering. Voltage level is 1/2 AVDD nominal.
XTI/MCLK 16 25 I Crystal or external-clock input. Used for derivation of all internal clocks on the AIC23.
XTO 18 26 O Crystal output. Connect to external crystal for applications where the AIC23 is the audio timing master.
Not used in applications where external clock source is used.