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 returns to a stand-by
power-saving state.
MOSI
MISO
MSSL
MCLK
VDD
VDD2
MODE
MSIZE
RST
CS
GND
+VDD
GPO2
GPO1
BUSY
SCL
SDI
RDY (Optional)
CLKOUT (Optional)
SPO+
SPO-
Optional
Host MCU
MOSI
MCLK
MSSL
P1.1
GND
XTAL1
CS
SO
GND
VCC
SCK
SI
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 µA
Typ.)
Operating Voltage: 2.7V - 5.5V
Operating Temperature: -40°C to
85°C
Package:
– 24-pin 4X4mm QFN
(KX1400EG)
Conexant Product Portfolio
Conexant’s comprehensive product portfolio includes solutions for imaging, audio, video surveillance, and embedded modem applications.
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 la ss-D
Amp
8 M H z Osc.
BUSY
© 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
