參數(shù)資料
型號: UDA1321
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: USB-Digital To Analog Converters(通用串行總線-數(shù)模轉(zhuǎn)換器)
中文描述: 0.055 MHz, MICROCONTROLLER, PDIP32
文件頁數(shù): 16/44頁
文件大小: 280K
代理商: UDA1321
1998 Oct 06
16
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
UDA1321
B
ASS CONTROL
The bass control is available for the master channel of the UDA1321. Bass can be regulated in three modes: minimum,
flat and maximum mode. The preferred mode is selected at start-up of the device (configuration map). The Bass range
is from 0 to about 14 dB (minimum mode) or about 24 dB (maximum mode) in steps of 2 dB. It should be noted that the
negative bass values as defined in the “USB Device Class Definition for Audio Devices”are not supported by the
UDA1321; the 0 dB value is returned as 0 dB. The maximum Bass value which will be reported to the host is always
24 dB independent of the mode. The maximum mode is the most accurate mode when the Bass values are reported to
the host. The corner frequency is 100 Hz for the minimum mode and 75 Hz for the maximum mode. Table 5 gives the
mapping of the
bBass
value upon the actual bass setting of the USB DAC.
Table 5
Bass control characteristics
bBASS
BASS USB
SIDE (dB)
BASS USB DAC (dB)
B7
B6
B5
B4
B3
B2
B1
B0
minimum
flat
maximum
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
...
5.25
...
7.25
...
9.25
...
11.25
...
13.25
...
15.25
...
17.25
...
0
0
0
1.1
0
1.7
2.4
0
3.6
0
0
0
1
0
1
0
1
3.7
0
5.4
0
0
0
1
1
1
0
1
5.2
0
7.4
0
0
1
0
0
1
0
1
6.8
0
9.4
0
0
1
0
1
1
0
1
8.4
0
11.3
0
0
1
1
0
1
0
1
10.2
0
13.3
0
0
1
1
1
1
0
1
11.9
0
15.2
0
1
0
0
0
1
0
1
13.7
0
17.3
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