參數資料
型號： ML6430
廠商： Fairchild Semiconductor Corporation
英文描述： Genlocking Sync Generator with Digital Audio Clock for NTSC, PAL & VGA(用于NTSC, PAL & VGA數字式音頻同步時鐘發(fā)生器)
中文描述： 同步鎖相同步發(fā)生器用于NTSC，PAL與數字音頻時鐘
文件頁數： 17/33頁
文件大?。?/td> 384K
代理商： ML6430
ML6430/ML6431
17
FUNCTIONAL DESCRIPTION
(Continued)
Audio Clock
: The Ml6430/ML6431 outputs a clock at
32kHz, 44.1kHz, or 48kHz. This clock is locked in
frequency to the basic video clock regardless of the
standard being used. With VCR head switches, the phase
correction required to track the timing is removed from
the audio clock by a patented circuit. This prevents the
audio clock from being modulated by step changes in
video timing. See the Table 9 for the audio clock rates
supported and how they are derived internally.
ADDITIONAL CONTROL REGISTERS (ML6431 ONLY)
DisAutoVCR
:
Disables the auto VCR detect circuit.
Register 7, Bit 0: DisAutoVCR
PHERROUT:
MUX phase error signal onto
AUDIOCLK/PHERROUT pin.
Register 7, Bit 3: PHERROUT enable
This bit controls the source of AUDIOCLK/PHERROUT.
When this bit is low, AUDIOCLK/PHERROUT provides the
audio clock output. When this bit is high, AUDIOCLK/
PHERROUT provides the 1-bit digital phase error of each
Hsync edge.
Additionally, when both PHERROUT enable and VGA bits
are logic high, the reset point of the pixel counter is
changed from 512 to 256. This changes the equation for
calculating the number of pixels per line verses the Pixel
Counter bits to the following:
P[10:0] = 2
′
(number of pixels per line) – 512
(2)
Table 9. Audio Clock Generation (ML6430/ML6431)
VIDEO STANDARD
AUDIO RATE
AUDIO/PIXEL CLOCK RATIO
AUDIO/FRAME RATE RATIO
CCIR601 NTSC
CCIR601 NTSC
CCIR601 NTSC
48kHz
44.1kHz
32kHz
(96000 ÷ 27MHz)
′
13.5MHz
(88200 ÷ 27MHz)
′
13.5MHz
(64000 ÷ 27MHz)
′
13.5MHz
(8008 ÷ 5)
′
29.97Hz
(147147 ÷ 100)
′
29.97Hz
(16016 ÷ 15)
′
29.97Hz
CCIR601 PAL
CCIR601 PAL
CCIR601 PAL
48kHz
44.1kHz
32kHz
(96000 ÷ 27MHz)
′
13.5MHz
(88200 ÷ 27MHz)
′
13.5MHz
(64000 ÷ 27MHz)
′
13.5MHz
(1920)
′
25Hz
(1764)
′
25Hz
(1280)
′
25Hz
NTSC Square Pixel
NTSC Square Pixel
NTSC Square Pixel
48kHz
44.1kHz
32kHz
(105600 ÷ 27MHz)
′
12.27MHz
(97020 ÷ 27MHz)
′
12.27MHz
(70400 ÷ 27MHz)
′
12.27MHz
(8008 ÷ 5)
′
29.97Hz
(147147 ÷ 100)
′
29.97Hz
(16016 ÷ 15)
′
29.97Hz
PAL Square Pixel
PAL Square Pixel
PAL Square Pixel
48kHz
44.1kHz
32kHz
(96000 ÷ 29.5MHz)
′
14.75MHz
(88200 ÷ 29.5MHz)
′
14.75MHz
(64000 ÷ 29.5MHz)
′
14.75MHz
(1920)
′
25Hz
(1764)
′
25Hz
(1280)
′
25Hz
NTSC 4xFSC
NTSC 4xFSC
NTSC 4xFSC
48kHz
44.1kHz
32kHz
(105600 ÷ 31.5MHz)
′
14.32MHz
(92400 ÷ 30MHz)
′
14.32MHz
(70400 ÷ 31.5MHz)
′
14.32MHz
(8008 ÷ 5)
′
29.97Hz
(147147 ÷ 100)
′
29.97Hz
(16016 ÷ 15)
′
29.97Hz
PAL 4xFSC
PAL 4xFSC
PAL 4xFSC
48kHz
44.1kHz
32kHz
(76800 ÷ 28.37MHz)
′
17.72MHz
(70560 ÷ 28.37MHz)
′
17.72MHz
(51200 ÷ 28.37MHz)
′
17.72MHz
(1920)
′
25Hz
(1764)
′
25Hz
(1280)
′
25Hz
相關PDF資料
PDF描述
ML6431 Genlocking Sync Generator with Digital Audio Clock for NTSC, PAL & VGA(用于NTSC, PAL & VGA數字式音頻同步時鐘發(fā)生器)
ML6440 Multi-Standard 8-bit Adaptive Digital Input Comb Filter(多標準8位自適應數字輸入組合濾波器)
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ML6509 Active SCSI Terminator(SCSI系統(tǒng)的有源終端器)
ML6510 Series Programmable Adaptive Clock Manager(系列可編程自適應時鐘管理器)
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