參數(shù)資料
型號: PCM3794RHBRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 通信及網(wǎng)絡(luò)
英文描述: SPECIALTY TELECOM CIRCUIT, PQCC32
封裝: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數(shù): 48/67頁
文件大小: 1417K
代理商: PCM3794RHBRG4
www.ti.com
SLES193C – AUGUST 2006 – REVISED FEBRUARY 2007
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 90
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
CMT1
CMT0
RSV
G20R
G20L
IDX[6:0]: 1011010b (5Ah): Register 90
CMT[1:0]: VCOM Ramp Up/Down Time Control
Default value: 00
These bits are used for selecting ramp up/down time from ground level to the common-voltage level or from the
common-voltage to ground level during the power up/down sequence, in order to reduce audible pop noise.
CMT[1:0]
VCOM Ramp Up/Down Time Control
0 0
Nominal; RCMT = 60 k (default)
0 1
Slow; RCMT = 120 k
1 0
Fast; RCMT = 30 k
1 1
Fastest; RCMT = 2.73 k
G20R: 20-dB Boost for PG2 (Gain Amplifier for AIN1R, AIN2R, and AIN3R)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G20R = 0
0 dB (default)
G20R = 1
20-dB boost
G20L: 20-dB Boost for PG1 (Gain Amplifier for AIN1L, AIN2L, and AIN3L)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G20L = 0
0 dB (default)
G20L = 1
20-dB boost
52
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