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: 11/164页
文件大小: 2003K
代理商: L64781
5-38
Registers
Figure 5.4
DTR_INIT_FREQ
5.5.14 Demod Parameters Registers 16, 17, and 18 (0x16, 0x17, 0x18)
These are three 8-bit wide, read/write registers.
DTR_INIT_FREQ
Timing Initial VCXO Offset
R/W
These three registers (DTR_INIT_FREQ_LSB,
DTR_INIT_FREQ_CSB, and DTR_INIT_FREQ_MSB)
specify the base frequency offset to the theoretical
sampling frequency.
The initial value of DTR_INIT_FREQ is
0b10011101010010 (0x002752).
When the DTR is enabled, this 24-bit value is determined
by the equation below:
Equation 5.1
XTAL
Edges
Resampling
Instants
t
0Ts
2Ts
3Ts
4Ts
5Ts
6Ts
7Ts
8Ts
0
Ts +
2Ts + 2
3Ts + 3
4Ts + 4
6Ts + 6
7Ts + 7
D7
D0
DTR_INIT_FREQ_LSB
DTR_INIT_FREQ_CSB
DTR_INIT_FREQ_MSB
InitFreq
2
25
810
6
B
-----------------
1
ε
+
() 1
=
l64781.book Page 38 Friday, January 19, 2001 1:28 PM
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