参数资料
型号: CS42L51-CNZR
厂商: Cirrus Logic Inc
文件页数: 37/43页
文件大小: 0K
描述: IC CODEC LOW-V 24BIT 32-QFP
标准包装: 6,000
类型: 立体声音频
数据接口: PCM 音频接口
分辨率(位): 24 b
ADC / DAC 数量: 2 / 2
三角积分调变:
动态范围,标准 ADC / DAC (db): 98 / 98
电压 - 电源,模拟: 1.8V,2.5V
电压 - 电源,数字: 1.8V,2.5V
工作温度: -10°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 32-QFP
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 管件
配用: 598-1005-ND - BOARD EVAL FOR CS42L51 CODEC
其它名称: Q3956082
42
DS679F1
CS42L51
4.9
Recommended Power-Down Sequence
To minimize audible pops when turning off or placing the CODEC in standby,
1.
Mute the DAC’s and ADC’s.
2.
Set the PDN bit in the power control register to ‘1’b. The CODEC will not power down until it reaches a
fully muted sate. Do not remove MCLK until after the part has fully muted. Note that it may be necessary
to disable the soft ramp and/or zero cross volume transitions to achieve faster muting/power down.
3.
Bring RESET low.
ADC Initialization
DAC Initialization
Software Mode
Registers setup to
desired settings.
RESET = Low?
No Power
1. No audio signal
generated.
Off Mode (Power Applied)
1. No audio signal generated.
2. Control Port Registers reset
to default.
Control Port
Active
Control Port Valid
Write Seq. within
10 ms?
Hardware Mode
Minimal feature
set support.
PDN bit = '1'b?
Sub-Clocks Applied
1. LRCK valid.
2. SCLK valid.
3. Audio samples
processed.
Valid
MCLK/LRCK
Ratio?
No
Yes
No
Yes
No
Yes
No
Normal Operation
Audio signal generated per control port or stand-
alone settings.
Analog Output Freeze
1. Aout bias = last audio sample.
2. DAC Modulators stop operation.
3. Audible pops.
ERROR: MCLK removed
PDN bit set to '1'b
(software mode only)
Standby Mode
1. No audio signal generated.
2. Control Port Registers retain
settings.
Reset Transition
1. Pops suppressed.
Power Off Transition
1. Audible pops.
ERROR: Power removed
Valid
MCLK Applied?
No
20 ms delay
Charge Caps
1. VQ Charged to
quiescent voltage.
2. Filtx+ Charged.
2048 internal
MCLK cycle delay
Digital/Analog
Output Muted
50 ms delay
Charge Pump
Powered Up
Headphone Amp
Powered Up
20
s delay
Headphone Amp
Powered Down
20
s delay (DAC
only)
Stand-By
Transition
1. Pops suppressed.
ERROR: MCLK/LRCK ratio change
RESET = Low
Figure 22. Initialization Flowchart
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