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PDF ( 数据手册 , 数据表 ) ZL3459

零件编号 ZL3459
描述 4.1-Chanel Audio Procesor
制造商 ZLmicro
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ZL3459 数据手册, 描述, 功能
ZL3459
4.1-Channel Audio Processor with Subwoofer
Features
Application
Controlled by I² C Interface
Car Audio
4 Stereo Inputs (including 1 quasi-differential input)
with selectable input gain
2 Channels Electronic Volume+15 to -79dB with
1dB/step
1 Subwoofer Output: +15 to -79dB with 1dB/step
Adjustable crossover frequency for Subwoofer
Tone Control (Bass and Treble): -15 to +15dB,
1dB/step
Input Gain Control: 0 to +15dB, 1dB/step
Loudness: 0 to -15dB, 1dB/step
4 independent speaker outputs: +15 to -79dB with
1dB/step & independent programmable mix
input with 50% mixing ratio for front speakers
Low Distortion and Low Noise
LQFP44 package
Description
The ZL3459 is a 4.1CH audio processor designed for Car Audio purpose. Using I2C interface controls all of the
functions. Like most of audio processor, it equipped up to 4 stereo sources input with adjustable gain, master volume
with adaptive loudness, treble and bass tone control.
In a car entertainment system needs front and rear seat individual control, the ZL3459 provides separate input source
selection and output volume adjust ; a special design mixing amp is very easy combine the navigation system or cellular
phone’s voice into the car audio system.
Block diagram
Ver:1.0
WWW.ZLMICRO.COM
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ZL3459 pdf, 数据表
ZL3459
4.1-Channel Audio Processor with Subwoofer
enough.
Data validity
A data on the SDA Line is considered valid and stable only when the SCL Signal is in HIGH State. The HIGH and LOW
State of the SDA Line can only change when the SCL signal is LOW. Please refer to the figure below.
Start and stop conditions
A Start Condition is activated when
1) The SCL is set to HIGH and
2) SDA shifts from HIGH to LOW State.
The Stop Condition is activated when
1) SCL is set to HIGH and
2) SDA shifts from LOW to HIGH State. Please refer to the timing diagram below.
Byte format
Every byte transmitted to the SDA Line consists of 8 bits. Each byte must be followed by an Acknowledge Bit. The
MSB is first transmitted.
Acknowledge
During the Acknowledge clock pulse (ACK), the SDA output port of the master device (μP) would be sets on Hi-Z state,
if peripheral device (ex: audio processor) recognize the I2C command the SDA line will be pull-down by slave device
during the SCL clock pulse held in HIGH state period. Please refer to the diagram below. The slave device that has been
addressed to generate an Acknowledge after receiving each byte, otherwise, the SDA Line will remain at the High level
in period of the ninth (9th) clock pulse. In this case, the host controller will generate a STOP sign in order to abort the
transfer mission.
Ver:1.0
WWW.ZLMICRO.COM
8/21







ZL3459 equivalent, schematic
ZL3459
4.1-Channel Audio Processor with Subwoofer
Mixinglevel (05H)/Speaker attenuator leftfront (06H) /Rightfront (07H) /Leftrear (08H)/Rightrear (09H)
/Subwoofer (10H)
Ver:1.0
WWW.ZLMICRO.COM
16/21










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