參數(shù)資料
型號: ST70134A
英文描述: ASCOT (TM) INTEGRATED ADSL CMOS ANALOG FRONT-END CIRCUIT
中文描述: 阿斯科特(TM)集成寬頻CMOS模擬前端電路
文件頁數(shù): 16/22頁
文件大?。?/td> 154K
代理商: ST70134A
ST70134A
16/22
RX Signal Dynamic
The dynamic of the signal from the ADC is limited to 13bits. Those bits are converted to a signed (2’s
complement) representation with a maximal positive number of 2
14
-1 and a most negative number -2
14
.
The 2 LSBs are filled with ’0’.
Table 20 :
RX Data Bit Map
The two sign bits must be identical.
Figure 9 :
TX/ RX Digital Interface Timing
BIT MAP/NIBBLE
N0
N1
N2
N3
RXD0
0
data bit 2
data bit 6
data bit 10
RXD1
0
data bit 3
data bit 7
data bit 11
RXD2
d0 = data bit 0 (LSB)
data bit 4
data bit 8
data SIGN
RXD3
data bit 1
data bit 5
data bit 9
data SIGN
Table 21 :
RX Nibble Bit Map
N3
N2
N1
N0
sign
sign
d11
d10
d9
d8
d7
d6
d5
d4
d3
d2
d1
d0
0
0
CLKM
35.328MHz
CLWD
8.832MHz
TXDx/RXDx
N0
N1
N2
N3
OSR = 4
CLKNIB
17.664MHz
CLWD
4.4162MHz
TXDx/RXDx
N0
N1
N2
N3
OSR = 2
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