3. TECHNICAL BRIEF
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3.18 VIBRATOR
The vibrator is placed in the folder cover and connected to KEYPAD PCB through FPCB.
The vibrator is driven from AD6527 by PWM.
3.19 Audio CODEC
The device integrates complete interfaces to stereo or mono microphones and a stereo headphone.
External component requirements are drastically reduced as no separate microphone or headphone
amplifiers are required. Advanced on-chip digital signal processing performs graphic equaliser, 3-D
sound enhancement and automatic level control for the microphone or line input. This chip operate as a
master or a slave, with various master clock frequencies including 12 or 24MHz for USB devices, or
standard 256fs rates such as 96kHz, 48kHz, 44.1kHz Are generated directly from the master clock
without the need for an external PLL.
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