參數(shù)資料
型號(hào)： SAA7114
廠商： NXP Semiconductors N.V.
英文描述： PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC combfilter, VBI-data slicer and high performance scaler
中文描述： PAL / NTSC制式/ SECAM視頻解碼器與自適應(yīng)PAL / NTSC制式梳狀濾波器，供血，數(shù)據(jù)限幅器和高性能縮放器
文件頁(yè)數(shù)： 64/147頁(yè)
文件大小： 759K
代理商： SAA7114
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2004 Mar 03
64
Philips Semiconductors
Product specification
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb filter, VBI data slicer and high performance scaler
SAA7114
9.2
Audio clock signals
The SAA7114 also synchronizes the audio clock and
sampling rate to the video frame rate, via a very slow PLL.
Thisensuresthatthemultimediacaptureandcompression
processes always gather the same predefined number of
samples per video frame.
An audio master clock AMCLK and two divided clocks
ASCLK and ALRCLK are generated:
ASCLK: can be used as audio serial clock
ALRCLK: audio left/right channel clock.
The ratios are programmable; see Section 8.6.
Table 26
Audio clock pin description
Note
1.
Pin numbers for LQFP100 in parenthesis.
SYMBOL PIN
(1)
I/O
DESCRIPTION
BIT
AMCLK
K12
(37)
J12
(41)
O
audio master clock output
ACPF[17:0] 32H[1:0] 31H[7:0] 30H[7:0] and
ACNI[21:0] 36H[5:0] 35H[7:0] 34H[7:0]
AMXCLK
I
external audio master clock input for the clock
division circuit, can be directly connected to
output AMCLK for standard applications
serial audio clock output, can be synchronized
to rising or falling edge of AMXCLK
audio channel (left/right) clock output, can be
synchronized to rising or falling edge of ASCLK
ASCLK
K14
(39)
J13
(40)
O
SDIV[5:0] 38H[5:0] and SCPH[3AH[0]]
ALRCLK
O
LRDIV[5:0] 39H[5:0] and LRPH[3AH[1]]
9.3
Clock and real-time synchronization signals
For the generation of the line-locked video (pixel) clock
LLC, and of the frame-locked audio serial bit clock, a
crystal accurate frequency reference is required. An
oscillator is built-in for fundamental or third harmonic
crystals. The supported crystal frequencies are
32.11 or 24.576 MHz (defined during reset by strapping
pin ALRCLK).
Alternatively pin XTALI can be driven from an external
single-ended oscillator.
The crystal oscillation can be propagated as a clock to
other ICs in the system via pin XTOUT.
The Line-Locked Clock (LLC) is the double pixel clock of
nominal 27 MHz. It is locked to the selected video input,
generating baseband video pixels according to “ITU
recommendation 601” In order to support interfacing
circuits, a direct pixel clock (LLC2) is also provided.
The pins for line and field timing reference signals are
RTCO, RTS1 and RTS0. Various real-time status
information can be selected for the RTS pins. The signals
are always available (output) and reflect the
synchronization operation of the decoder part in the
SAA7114. The function of the RTS1 and RTS0 pins can
be defined by bits RTSE1[3:0] 12H[7:4] and RTSE0[3:0]
12H[3:0].
相關(guān)PDF資料
PDF描述
SAA7115 PAL/NTSC/SECAM Video Decoder with Adaptive PAL/NTSC Comb Filter, High Performance Scaler, I2C Sliced Data Readback and SQ PIXEL OUTPUT
SAA7116 Digital Video to PCI Interface
SAA7116H Video Converter Circuit
SAA7145
SAA7146
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA7114E 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC comb filter, VBI data slicer and high performance scaler
SAA7114E/V2,518 功能描述:視頻 IC DIGITAL VIDEO DECODER W/COMB F RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7114H 制造商:NXP Semiconductors 功能描述: 制造商:Philips Semiconductor 功能描述:
SAA7114H/V2 制造商:NXP Semiconductors 功能描述:7114H/V2557
SAA7114H/V2,518 功能描述:視頻 IC DIGITAL VIDEO DECODER W/COMB F RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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