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| AT73C213 |
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 ATMEL
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2 page 
2 2744A–PMGMT–27-Jan-05 AT73C213 The stereo 32 Ohm headset pair of drivers also includes a mixer of a LINEL and LINER pair of stereo inputs, as well as a differential monaural auxiliary input (line level). The DAC output can be connected through a buffer stage to the input of the audio power ampli- fier, using 2x coupling capacitors The mono buffer stage also includes a mixer of the LINEL and LINER inputs, as well as a differential monaural auxiliary input (line level) which can be, for example, the output of a voice Codec output driver in mobile phones. The audio power amplifier is a dual-mode AB class amplifier with differential output and pro- grammable volume control. In full power mode, it is capable of driving an 8-ohm loudspeaker at maximum power of 1W at 5V supply and 440 mW at 3.6V supply. In low power mode, it can drive the same loudspeaker as an earpiece, making it suitable as a handsfree speaker driver in wireless handset application. The volume, mute, power down, de-emphasis controls and 16-bit, 18-bit and 20-bit audio formats are digitally programmable via a 4-wire SPI bus and the digital audio data are provided through a multi-format I2S interface. 2. Block Diagram Figure 2-1. AT73C213 Functional Block Diagram AT73C213 RSTB SMODE VDIG SDIN LRFS BCLK Digital Filter LINER LINEL HSR HSL AVDDHS LOLC: -6 to +6dB in 3dB step 32 driver 32 driver Volume Control LMPG: -34.5dB to +12dB in 1.5dB step and mute VCM PGA Digital Filter Volume Control LLIG: -33 to +12dB in 3dB step + 20dB and mute SPI_DOUT SPI_CLK SPI_CSB SPI SPI_DIN DAC + + LLOG: -46.5dB to 0dB in 1.5dB step and mute + + GNDD MCLK INGND Status Registers + PGA AUXN AUXP MONO MONOP MONON DAC MONO RLIG: -33 to +12dB in 3dB step + 20dB and mute RMPG: -34.5dB to +12dB in 1.5dB step and mute Volume Control Volume Control RLOG: -46.5dB to 0dB in 1.5dB step and mute ROLC: -6 to +6dB in 3dB step AUXG: -33 to +12dB in 3dB step +20 dB and mute APAGAIN -22 to +20dB in 3dB step |
