参数资料
型号: CDB4398
厂商: Cirrus Logic Inc
文件页数: 29/46页
文件大小: 0K
描述: BOARD EVAL FOR CS4398 DAC
标准包装: 1
DAC 的数量: 2
位数: 24
采样率(每秒): 192k
数据接口: I²C,SPI?
DAC 型: 电压
工作温度: -10°C ~ 70°C
已供物品: 板,线缆
已用 IC / 零件: CS4398
产品目录页面: 757 (CN2011-ZH PDF)
相关产品: 598-1067-5-ND - IC DAC 120DB 192KHZ W/VC 28TSSOP
其它名称: 598-1155
DS568F1
35
CS4398
7.7
Ramp and Filter Control - Register 07h
7.7.1
Soft Ramp AND Zero Cross CONTROL (SZC1:0) Bits 7-6
Default = 10
Function:
Immediate Change
When Immediate Change is selected, all level changes will take effect immediately in one step.
Zero Cross
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.
Soft Ramp PCM
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.
Soft Ramp DSD
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 512 DSD_SCLK periods
(1024 periods if 128x DSD_SCLK is used).
Soft Ramp and Zero Cross
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 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 sample
rate) if the signal does not encounter a zero crossing. The zero cross function is independently monitored
and implemented for each channel.
7
6
5
432
10
SZC1
SZC0
RMP_UP
RMP_DN
Reserved
FILT_SEL
Reserved
DIR_DSD
10
11
00
SZC1 SZC0
PCM Description
DSD Description
0
Immediate Change
01
Zero Cross
1
0
Soft Ramp
1
Soft Ramp on Zero Crossings
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