參數資料
型號: CS4265-DNZR
廠商: Cirrus Logic Inc
文件頁數: 37/46頁
文件大小: 0K
描述: IC CODEC 24BIT 104DB 32-QFN
標準包裝: 6,000
類型: 立體聲音頻
數據接口: 串行
分辨率(位): 24 b
ADC / DAC 數量: 2 / 2
三角積分調變:
動態(tài)范圍,標準 ADC / DAC (db): 104 / 104
電壓 - 電源,模擬: 3.13 V ~ 5.25 V
電壓 - 電源,數字: 3.13 V ~ 5.25 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 32-QFN
供應商設備封裝: 32-QFN 裸露焊盤(5x5)
包裝: 帶卷 (TR)
配用: 598-1001-ND - BOARD EVAL FOR CS4265 CODEC
42
DS657F3
CS4265
6.11
DAC Channel B Volume Control - Address 0Bh
6.11.1
Volume Control (Bits 7:0)
Function:
The digital volume control allows the user to attenuate the signal in 0.5 dB increments from 0 to -127 dB.
The Vol0 bit activates a 0.5 dB attenuation when set, and no attenuation when cleared. The Vol[7:1] bits
activate attenuation equal to their decimal equivalent (in dB). Example volume settings are decoded as
shown in Table 16. The volume changes are implemented as dictated by the DACSoft and DACZero-
Cross bits in the DAC Control 2 register (see Section 6.12.1).
6.12
DAC Control 2 - Address 0Ch
6.12.1
DAC Soft Ramp or Zero Cross Enable (Bits 7:6)
Function:
Soft Ramp Enable
Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally ramp-
ing, in 1/8 dB steps, from the current level to the new level at a rate of 1 dB per 8 left/right clock periods.
Zero Cross Enable
Zero Cross Enable dictates that signal-level changes, either by attenuation changes or muting, will occur
on a signal zero crossing to minimize audible artifacts. The requested level change will occur after a time-
out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal
does not encounter a zero crossing. The zero cross function is independently monitored and implemented
for each channel. See Table 17.
Soft Ramp and Zero Cross Enable
Soft Ramp and Zero Cross Enable dictate that signal-level changes, either by attenuation changes or mut-
ing, will occur in 1/8 dB steps and be implemented on a signal zerocrossing. The 1/8 dB level change will
occur after a time-out period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sam-
76
543
21
0
Vol7
Vol6
Vol5
Vol4
Vol3
Vol2
Vol1
Vol0
Binary Code
Volume Setting
00000000
0 dB
00000001
-0.5 dB
00101000
-20 dB
00101001
-20.5 dB
11111110
-127 dB
11111111
-127.5 dB
Table 16. Digital Volume Control Example Settings
76
543
21
0
DACSoft
DACZero
InvertDAC
Reserved
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