Rainbow Electronics AT73C246 - Manual (Page 137)

137
11050A–PMAAC–07-Apr-10
AT73C246
// account.
TWI_WRITE 0x3F @ AUDIO_CONTROL
TWI_WRITE 0x2F @ AUDIO_CONTROL
// STANDBY release. The codec softly starts.
TWI_WRITE 0x40 @ AUTOSTART.
// Codec Pause by Standby
// All gains are softly ramped down to mute. The codec functions are
// shut down. Current consumption is reduced to a few hundreds of micro-
// amps. VMID remains charged
TWI_WRITE 0x60 @ AUTOSTART
// Pause out: Standby release. The codec softly re-starts.
TWI_WRITE 0x40 @ AUTOSTART
// On-the-fly path change: the stereo microphone inputs are added to the
// DAC playback. The software sets: ONMICL, ONMICR, and ONSIDETONE.
TWI_WRITE 0x70 @ INPUT_CTRL
TWI_WRITE 0x6F @ OUTPUT_CTRL
TWI_WRITE 0x00 @ INPUT_MIXER
// Sidetone gain
TWI_WRITE 0x00 @ SIDETONE_VOL
// ENCONF pulse: the audio controller takes the requested changes into
// account. The path modification is here immediate because STANDBY=0.
TWI_WRITE 0x3F @ AUDIO_CONTROL
TWI_WRITE 0x2F @ AUDIO_CONTROL
// Codec Shutdown. ENAC = 0, STANDBY = 1. The codec turns off smoothly.
// In case of AC Coupling output configuration, HPR & HPL will slowly
// discharge following VMID time constant.
TWI_WRITE 0x20 @ AUTOSTART
WAIT 600ms
// Disable DCBLOCK bit.
TWI_WRITE 0x07 @ AUDIO_CONTROL
// LDO4 shutdown.
TWI_WRITE 0x0C @ VDD4_CONTROL