lm49370rl National Semiconductor Corporation, lm49370rl Datasheet - Page 52

• Manufacturer Part Number: lm49370rl
• Description: Audio Sub-system With An Ultra Low Emi, Spread Spectrum, Class D Loudspeaker Amplifier, A Dual-mode Stereo Headphone Amplifier, And A Dedicated Pcm Interface For Bluetooth Transceivers
• Manufacturer: National Semiconductor Corporation

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Bits
12.35 PCM PORT MODE CONFIGURATION REGISTER
This register is used to control the audio data interfaces.
0
1
3
4
5
6
7
PCM_ALAW_μLAW
PCM_CLOCK_SOURCE DAC or ADC Clock 0 = DAC, 1 = ADC (Note 32)
PCM_SDO_LSB_HZ
PCM_COMPAND
PCM_SYNC_MS
PCM_OUT_ENB
PCM_IN_ENB
Field
If set, the PCM output bus is enabled. If this bit is cleared, thr PCM output will be tristate and all
RX clocks will be gated.
If set, the PCM input is enabled. If this bit is cleared, the PCM input is ignored and TX clocks are
generated.
If set, PCM_SYNC generation is enabled and is driven by the device (Master).
If set, when the PCM port has run out of bits to transmit, it will tristate the SDO output.
If set, the data sent to the PCM port is companded and the PCM data received by the PCM receiver
is treated as companded data.
If PCM_ COMPAND is set, then the data across the PCM interface to the DAC and from the ADC
is companded as follows:
FIGURE 13. PCM Audio Port CLOCK/SYNC Options
PCM_ALAW_μLAW
TABLE 35. PCM MODE (0x1Ch)
0
1
52
Description
Commanding Type
μ-LAW
A-Law
201917r1