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: 162/164页
文件大小: 2003K
代理商: L64781
Demod Parameters Registers
5-27
The initial value of AFC_SENSITIVITY is 0b110.
Values in analog the AFC loop mode are:
The initial value of AFC_SENSITIVITY is 110.
5.5.2 Demod Parameters Registers 2, 3, and 4 (0x08, 0x09, 0x0A)
These are three 8-bit wide, read/write registers.
AFC_INIT_FRQ
AFC Initial Frequency Offset
D[7:0]/D[7:0]/D[7:0] R/W
These three registers (AFC_INIT_FRQ_LSB,
AFC_INIT_FRQ_CSB, and AFC_INIT_FRQ_MSB) select
the initial frequency offset directed towards the tuner or
DDFS block.
It is a 24-bit wide register, stored in three 8-bit registers.
In read mode, this value represents the actual
frequency offset (for example, the content of the
integrator) recovered by the system.
In write mode, this value reinitializes the integrator
value.
AFC_SENSITIVITY[2:0]
Denition
00
0
00
1
01
0
01
1
10
0
10
1
11
0
11
1
K
SENS
2.44
4
×10
K
SENS
4.88
4
×10
K
SENS
9.8
4
×10
K
SENS
1.95
3
×10
K
SENS
3.9
3
×10
K
SENS
7.8
3
×10
K
SENS
1.56
2
×10
K
SENS
3.1
2
×10
D7
D0
AFC_INIT_FRQ_LSB
AFC_INIT_FRQ_CSB
AFC_INIT_FRQ_MSB
l64781.book Page 27 Friday, January 19, 2001 1:28 PM
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