KX1400 audio playback ic the KX1400 is an audio playback ic designed to play 8 khz audio data directly to an external speaker via an on-chip digital audio processor and class-d driver. both 12-bit pcm and 4-bit ima adpcm data formats are supported. it also has a built-in tone generator capable of generating tones at 4096 different frequencies. the on-chip audio processor eliminates the need for an external low-pass filter in most cases. the KX1400 utilizes low-power cmos technology and provides a stand-by power-savings state, making it well suited for battery-powered applications. example application circuit the example circuit shown in the right column below shows the KX1400 in host-controlled operation with audio data stored in external serial memory. commands are sent from the mcu to play tones and audio phrases from external memory. audio data and commands can also be stored in the mcu's data memory and transmitted to the KX1400, eliminating the need for an external memory ic. the KX1400 operates in either a standalone mode or interfaced to a microcontroller (mcu) host. audio data is provided to the KX1400 from either a user-programmed external serial memory or from the host mcu. under mcu control, the user can select phrases or tone sequences to play from the external memory, play tone sequences via commands, or stream audio data directly to the on-chip audio processor. in standalone mode, no mcu is required; on reset, the KX1400 plays a single phrase from external memory and then retu rns to a stand-by power-saving state. mosi miso mssl mclk vdd vdd2 mode msize rst cs gn d +vd d gpo2 gpo1 bus y scl sdi rdy (optional) clkout (optional) spo+ spo - optiona l host mcu mosi mclk mssl p1.1 gn d xtal 1 cs so gnd vcc sck s i p1.0 serial memory part number KX1400 description KX1400 audio playback ic conexant part number ordering number description packages KX1400eg-11z KX1400eg-11z KX1400 audio playback ic 24qfn 4x4mm KX1400dk-evk KX1400dk-evk KX1400 evaluation kit the devices are lead-free (pb free) and rohs compliant
KX1400 features ? plays pre-recorded 8 khz audio data ? operates standalone or as mcu peripheral ? on-chip tone generator ? built-in digital audio processor ? integrated class-d speaker driver ? no external low-pass filter required ? digital volume control ? on-chip oscillator - no xtal required ? plays up to 4096 pre-recorded audio phrases ? configurable general-purpose clock output ? two general-purpose digital outputs ? low-power standby state (1 a typ.) ? operating voltage: 2.7v - 5.5v ? operating temperature: -40c to 85c ? package: ? 24-pin 4x4mm qfn (KX1400eg) conexant product portfolio conexant?s comprehensive product portfolio includes solutions for imaging, audio, video surveillance, and embedded modem applic ations. KX1400 functional block diagram the KX1400 is offered in a 24-pin 4x4mm qfn (KX1400eg) package digital audio processor memory i/f clock divider mcu i/f tone generator control volume control clkout rst scl sdi cs rdy msize vdd vdd2 gnd mode gpo2 spo+ spo- gpo2 miso mosi mssl mclk c lass-d amp 8 m h z os c. bus y ? 2011 conexant systems, inc. all rights reserved. conexant and the conexant logo are registered trademarks of conexant systems, inc. all other trademarks are owned by their respective owners. although conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. this material is provided as is and without any express or implied warranties, including merchantability, fitness for a paparticular purpose and non-infringement. conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. www.conexant.com general information: u.s. and canada: (888) 855-4562 international: 1+ (949) 483-3000 headquarters 4000 macarthur blvd. newport beach, ca 92660 doc# pbr-202776
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