参数资料
型号: CDB4265
厂商: Cirrus Logic Inc
文件页数: 36/46页
文件大小: 0K
描述: BOARD EVAL FOR CS4265 CODEC
标准包装: 1
主要目的: 音频编解码器
嵌入式:
已用 IC / 零件: CS4265
主要属性: 立体声 24 位 192 kHz 采样率
次要属性: 图形用户界面,S/PDIF/ I2S / I2C / SPI 接口
已供物品: 板,缆线,CD
产品目录页面: 754 (CN2011-ZH PDF)
相关产品: CS4265-DNZR-ND - IC CODEC 24BIT 104DB 32-QFN
CS4265-DNZ-ND - IC CODEC 24BIT 104DB 32-QFN
598-1039-ND - IC CODEC 24BIT 104DB 32QFN
其它名称: 598-1001
DS657F3
41
CS4265
6.9
ADC Input Control - Address 09h
6.9.1
PGA Soft Ramp or Zero Cross Enable (Bits 4:3)
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 14.
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 asignal zero crossing. 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-
ple rate) if the signal does not encounter a zero crossing. The zero cross function is independently mon-
itored and implemented for each channel. See Table 14.
6.9.2
Analog Input Selection
(Bit 0)
Function:
These bits are used to select the input source for the PGA and ADC. Please see Table 15.
6.10
DAC Channel A Volume Control - Address 0Ah
7
65
432
10
Reserved
PGASoft
PGAZero
Reserved
Select
PGASoft
PGAZeroCross
Mode
0
Changes to affect immediately
0
1
Zero Cross enabled
1
0
Soft Ramp enabled
1
Soft Ramp and Zero Cross enabled (default)
Table 14. PGA Soft Cross or Zero Cross Mode Selection
Select
PGA/ADC Input
0
Microphone-Level Input
1
Line-Level Input
Table 15. Analog Input Selection
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