L64704 LSI Logic Corporation, L64704 Datasheet - Page 75

• Manufacturer Part Number: L64704
• Description: Satellite Decoder Technical Manual 5/97
• Manufacturer: LSI Logic Corporation

3.6.22
Group 4,
APR 24
Carrier
Frequency
Reference
Period
3.6.23
Group 4,
APR 25, 26
Carrier Loop
Filter Gain
(P and D Terms)
Read/Write: R/W
This register is used to program the preset value for the frequency sweep
reference counter.
Read/Write: R/W
Reserved
CAR_RP[3:0] Reference Period for Carrier Frequency
Program CAR_KP and CAR_KD with values that set the parameters of
the carrier recovery loop. CAR_KP is restricted to values between 30 and
127 inclusive. See
Read/Write: R/W
Group 4 Registers
APR
APR
APR
23
24
25
D7
D7
D7
Reserved Bits
These bits are reserved for LSI Logic internal use only.
Reserved bits should always be set to 0, and will produce
random results when read.
(CAR_DCLKP/N pin) Measurement
Program the preset value for the four MSBs of the fre-
quency sweep reference counter into this register. The
value programmed equals 1024 times the number of
crystal (XOIN) clock cycles. See Section
Acquisition.”
D6
D6
D6
Reserved
Section 5.6.2.2, “Loop Characteristics”
D5
D5
D5
CAR_OFFSET[7:0]
D4
D4
D4
CAR_KP[7:0]
D3
D3
D3
D2
D2
D2
CAR_RP[3:0]
5.6.1, “Carrier
for details.
D1
D1
D1
D0
D0
D0
[7:4]
[3:0]
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