参数资料
型号: L64781
厂商: LSI CORP
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封装: PLASTIC, QFP-100
文件页数: 116/164页
文件大小: 2003K
代理商: L64781
Channel Output Interface
3-15
Figure 3.16 FEC Output Parallel Mode B
Figure 3.17 shows the FEC output parallel mode C, in which BCLKOUT
is free-running and DVALIDOUT is LOW during check bytes and gap. In
this mode, OF = 1 and BF = 1.
Figure 3.17 FEC Output Parallel Mode C
3.2.2 Fast Fourier Transform (FFT) Output Mode
When the channel output interface is in Fast Fourier Transform (FFT)
output mode, MUXOUT_SELECT = 001 and the logical mapping is done
as follows:
PCLKOUT = CLK36
BCLKOUT = I_Q_SEL
XCTR_OUT[2] = FFT_STARTOUT_OFF
XCTR_OUT[1] = FFT_DVOUT_OFF
FSTARTOUT and DVALIDOUT and CO[7:0] = FFT_XOUT[9:0] when
I_Q_SEL = 0 or FFT_YOUT[9:0] when I_Q_SEL = 1
Figure 3.18 shows the FFT output waveform.
Message
Check Byte
(FMODE = 1)
Gap
(FMODE = 0)
BCLKOUT
FSTARTOUT
CO[7:0]
DVALIDOUT
Message
Check Byte
(FMODE = 0 or 1)
Gap
BCLKOUT
FSTARTOUT
CO[7:0]
DVALIDOUT
l64781.book Page 15 Friday, January 19, 2001 1:28 PM
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