ZHCSK28E April 2003 – July 2019 PCM1753 , PCM1754 , PCM1755
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- 8.6.1
Mode Control Registers (PCM1753/55)
- 8.6.1.1 User-Programmable Mode Controls
- 8.6.1.2
Register Definitions
- 8.6.1.2.1 ATx[7:0]: Digital Attenuation Level Setting
- 8.6.1.2.2 MUTx: Soft Mute Control
- 8.6.1.2.3 OVER: Oversampling Rate Control
- 8.6.1.2.4 SRST: Reset
- 8.6.1.2.5 DACx: DAC Operation Control
- 8.6.1.2.6 DM12: Digital De-Emphasis Function Control
- 8.6.1.2.7 DMF[1:0]: Sampling Frequency Selection for the De-Emphasis Function
- 8.6.1.2.8 FMT[2:0]: Audio Interface Data Format
- 8.6.1.2.9 FLT: Digital Filter Rolloff Control
- 8.6.1.2.10 DREV: Output Phase Select
- 8.6.1.2.11 ZREV: Zero Flag Polarity Select
- 8.6.1.2.12 AZRO: Zero Flag Function Select
- 8.6.1
Mode Control Registers (PCM1753/55)
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
8.6.1.2.2 MUTx: Soft Mute Control
where x = 1 or 2, corresponding to the DAC outputs VOUTL (x = 1) and VOUTR (x = 2).
Default value: 0
The mute bits, MUT1 and MUT2, are used to enable or disable the soft mute function for the corresponding DAC outputs, VOUTL and VOUTR. The soft mute function is incorporated into the digital attenuators. When mute is disabled (MUTx = 0), the attenuator and DAC operate normally. When mute is enabled by setting MUTx = 1, the digital attenuator for the corresponding output is decreased from the current setting to infinite attenuation, one attenuator step (0.5 dB) for every 8/fS seconds. This provides pop-free muting of the DAC output.
By setting MUTx = 0, the attenuator is increased one step for every 8/fS seconds to the previously programmed attenuation level.